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Rebar Mappe 2010 englisch


  • pg 1
									RUMUL Resonant Testing Machine VIBRO-Forte 500 kN

Technical specifications:
Max. upper load                             500 kN
Max. static load (compression or tension)   500 kN
Max. dynamic load                           500 (+/-250 kN)
Max. dynamic stroke                         4 mm

Total weight                                4’100 kg

Separate control unit

Area of load frame                          1.3 x 1.0 m
Necessary area around load frame on
rear and lateral sides                      0.6 m
Necessary area on front = user side         1.2 m

Basic supports on floor by 4 platens of
120 x 120 mm arranged on an area of         0.7 x 0.9 m

Subject to technical changes!                                 October 2008

                                    RUMUL VIBRO-Forte
                                        the ideal system for
                                   Fatigue Testing up to 500 kN

    feature                                     advantage
    bipolar concept of dynamic drive            no countermass needed = low weight/easy installation

    simple and solid construction               reliable system for high loads at a very attractive price

    big and adjustable test area                ideal system for rebars, chains and fasteners

    available gripping devices for rebars,   reliable grips for all high load applications
    fasteners, chains and standard specimens

    dynamic drive „MAGNODYN“                    very high power = very high dynamic load achievable

    newest electronics RUMUL TOPP               Tests with Optimized Power and Precision

    RUMUL Software                              very easy operation and evaluation of tests

IK/bm 15.02.2008
Vorzüge RUMUL VIBRO-Forte
Why a RUMUL Resonant Testing Machine?
♦ Focussing on resonant testing machines for more than 40 years
♦ Family-owned enterprise active in the field of resonant testing machines since 1963
♦ Ultimate competence through specialising in resonant testing systems

Technical Features:
♦ Very low running costs, no maintenance, no additional devices (power pack, cooling)
♦ Higher frequencies achievable, approx. + 10 % to + 100 % compared to other
  resonant testing systems; + 100 % to + 300 % compared to servo-hydraulic systems
♦ Frequency adjustable in 4 - 8 steps (depending on model)

♦ Latest fully digital electronics since 2004
♦ 4 channel 16 bit sampling rate 8 kHz per each channel

♦ 0,5 % of the displayed force values
♦ 0,01 Hz accuracy for frequency drop (crack detection)
♦ < 5% alignment error according ISO 7500-1

♦ Easy operation due to software designed for the use with resonant testing
  machines only
♦ Software available for fatigue, block tests, precracking and crack propagation
♦ Network functions (e-mail or SMS message, test status display on other PCs, etc.)

Documentation of the Tests:
♦ Complete and easy with "History-" function in the basic program
♦ Own evaluation program for Woehler tests with automatic data transfer

Setting of the Tests:
♦ Very easy test set-up by remote control with built-in digital display

Required Space:
♦ Less than 1 sqm due to integrated controller

♦ 18 months software updates free
♦ Daily rates for calibration or repair services approx. € 750 only
♦ 24 months warranty

Future System Add-Ons:

♦ Complete program for environmental simulation (furnaces, climate, corrosion, etc.)
♦ Accessories for crack length measurement

Russenberger Prüfmaschinen AG Gewerbestr. 10 / Rundbuck CH-8212 Neuhausen 2    January 2008
RUMUL VIBRO-Forte rebar application

RUSSENBERGER PRÜFMASCHINEN AG                               Phone    +41 52 672 43 22
Gewerbestrasse 10/Rundbuck                                  Fax      +41 52 672 44 48
CH-8212 Neuhausen am Rheinfall/Switzerland   e-mail

IK/bm 02/2008
                              X (min=20)
     2320+X - 2950+X


                                                                         430+X - 1060+X

                                                   1290                                              925

                         Load capacity 1)                 500 kN                          Separate control unit
                         Max. dynamic force               +/-250 kN
                         Max. static force                500 kN                          1) max. crest value from
                         Frequency 2)                     50-150 Hz                       static and dynamic force
                         Power requirement                3x400 V
                         Fuse                             16 Amps                         2) depending on stiffness
                         Weight approx.                   4100 kg                         of specimen, in addition
                                                                                          adjustable with 4 steps

                                                                                                           Subject to technical change

Änderungen: 30.7.08 neue Abmessungen                      7.10.08 Gewichtangabe

                                                                                                       Gez.    26.01.2008 Be.
 VIBRO-Forte                                                                                           Gepr. 26.01.2008 Be.

 Layout                                                                                       1:20
                                                                                                       Datei   0401.02V-8.idw

                                           RUSSENBERGER PRÜFMASCHINEN AG
                                           CH-8212 NEUHAUSEN
          Available Gripping Devices
            for Rebars for use with
          Resonance Testing Systems

I.   Standard Grips "type PAUL"
     (offered by competitor)

cheap solution
very high risk of rupture within gripping
area for higher diameters (> 20 mm)
specimen preparation needed for all diameters

II. RUMUL HydroGrip 160 kN
very low risk of rupture within gripping area
no specimen preparation needed!
higher investment volume

III. RUMUL PowerGrip 300 kN and 500 kN
very low risk of rupture within gripping area
for higher diameters (> 20 mm)
no specimen preparation needed!
higher investment volume

IK/bm 15.02.2008
Vorzüge RUMUL VIBRO-Forte
                Gripping heads 400 kN "Paul System"

                Specimen preparation for grips "PAUL-System"

February 2007                                           PAUL System
                 RUMUL Gripping Devices

Gripping Heads RUMUL HydroGrip 160 kN

Inserts for RUMULHydroGrip 160 kN

RUSSENBERGER PRÜFMASCHINEN AG                               Phone    +41 52 672 43 22
Gewerbestrasse 10/Rundbuck                                  Fax      +41 52 672 44 48
CH-8212 Neuhausen am Rheinfall/Switzerland   e-mail

IK/bm 02/2008
RUMUL HydroGrip rebar application

Russenberger Prüfmaschinen AG Gewerbestr. 10 / Rundbuck CH-8212 Neuhausen 2   April 2010
RUMUL HydroGrip
rebar application zoom

Russenberger Prüfmaschinen AG Gewerbestr. 10 / Rundbuck CH-8212 Neuhausen 2   April 2010
RUMUL PowerGrip 300 kN resp. 500 kN

RUSSENBERGER PRÜFMASCHINEN AG                               Phone    +41 52 672 43 22
Gewerbestrasse 10/Rundbuck                                  Fax      +41 52 672 44 48
CH-8212 Neuhausen am Rheinfall/Switzerland   e-mail

IK/bm 06/2008
         Gripping heads RUMUL PowerGrip 500 kN
         ( 300 kN version as well available)

February 2007                                  PowerGrip 500 kN for rebars
RUMUL PowerGrip 500 kN

RUSSENBERGER PRÜFMASCHINEN AG                               Phone    +41 52 672 43 22
Gewerbestrasse 10/Rundbuck                                  Fax      +41 52 672 44 48
CH-8212 Neuhausen am Rheinfall/Switzerland   e-mail

IK/bm 09/2007
RUMUL PowerGrip 500 kN Zoom

RUSSENBERGER PRÜFMASCHINEN AG                               Phone    +41 52 672 43 22
Gewerbestrasse 10/Rundbuck                                  Fax      +41 52 672 44 48
CH-8212 Neuhausen am Rheinfall/Switzerland   e-mail

IK/bm 09/2007
RUMUL Model View

RUSSENBERGER PRÜFMASCHINEN AG                               Phone    +41 52 672 43 22
Gewerbestrasse 10/Rundbuck                                  Fax      +41 52 672 44 48
CH-8212 Neuhausen am Rheinfall/Switzerland   e-mail

IK/bm 09/2007

RUMUL Resonanzprüfmaschine / RUMUL Resonant Testing Machine

500 kN

CELSA, Cardiff, Great Britain
Fontana Luigi s.p.a., Veduggio (MI), Italy
Force Technology, Brondby, Denmark
L. G. Balakrishnan & Bros. Ltd., Coimbatore, India
Mittal Steel Krivorozstal, Krivojrog, Ukraina
Politecnico di Bari, Italy
Reinz-Dichtungs-GmbH, Neu-Ulm, Germany
SSAB Tunnplat AB, Borlänge, Sweden
Tecnica UK Limited, Doncaster, Great Britain
TU München, Germany


                                 RUSSENBERGER PRÜFMASCHINEN AG
Fatigue Parameters for rebars to comply with current European
              Standards (DE, ES, PT, NO, GB)

                 Nom        Lower          Mean     Upper    Lower     Upper     Specimen         Length      Free Length
     Size        Area       Load           Load     Load     Stress    Stress     Length            new        Spain only
                (mm²)        (kN)          (kN)      (kN)    (Mpa)     (Mpa)       (mm)            (mm)          (mm)
                                                                                GB only            (x 14)    140mm/x10/x15
       6          28,27         3,39         5,94     8,48    120,00   300,00           180               84            140
       8          50,27         6,03        10,56    15,08    120,00   300,00           240             112             140
      10          78,54         9,42        16,49    23,56    120,00   300,00           300             140             140
      12         113,10        13,57        23,75    33,93    120,00   300,00           360             168             140
      14         153,94        18,47        32,33    46,18    120,00   300,00           420             196             140
      16         201,06        24,13        42,22    60,32    120,00   300,00           480             224             140
      18         254,47        30,54        53,44    76,34    120,00   300,00           540             252             180
      20         314,16        37,70        65,97    94,25    120,00   300,00           600             280             200
      25         490,87        58,90       103,08   147,26    120,00   300,00           750             350             250
      28         615,75        73,89       129,31   184,73    120,00   300,00           840             392             280
      32         804,25        96,51       168,89   241,27    120,00   300,00           960             448             480
      40        1256,64       150,80       263,89   376,99    120,00   300,00          1200             560             600
                          lower load levels in GB                               not in practice

IK/14.11.2007                                                          Fatigue loading parameters European standards for rebars
 Requirements        ISO 15630-1        ENV 10080       BS 4449:2005           DS 13080          NS 3576-3       SFS 1201                                                LNEC E-460
Free length; mm       ≥ 140 or 14Dn         ---                ---                   ---              ---          14Dn                                                  ≥ 140 or 14Dn
Number of load         Specified by
                                          ≥ 2×106           ≥ 5×106             ≥ 2×106          until failure    ≥ 3×106                                                  ≥ 2×106
     cycles          product standard
                                                           1 ÷ 200 Hz
  Frequency, f         1 ÷ 200 Hz        1 ÷ 200 Hz     (in accordance to            ---              ---        1 ÷ 200 Hz                                                 200 Hz
                                                          ISO 15630-1)
                                                               ---               1
Upper stress, Rup                                                                  ReHk
                                                        Dn≤16                                     420 MPa

                                                                                                                   Determined depending on the purpose of the testing,
                                                                     250MPa      3
                       Specified by                   16<Dn≤20       231MPa                       315 MPa
            Fup                           300 MPa                                                                                                                          300 MPa
                     product standard                                                             252 MPa
    Rup =                                             20<Dn≤25       213MPa B500BR     167 MPa
                                                                                                  200 MPa
            S0                                        25<Dn≤32       200MPa B550BR     183 MPa
                                                        Dn>32        188MPa

                                                                                                                                 through σ-N diagram
Lower stress, Rlow
                                                        Dn≤16         50MPa                        20 MPa
                       Specified by          ---      16<Dn≤20        45MPa
                                                                                 0 MPa
                                                                                                   15 MPa
                                                                                                                                                                           150 MPa
            Flow     product standard    (120 MPa)    20<Dn≤25        43MPa                        12 MPa
   Rlow =
            S0                                        25<Dn≤32        40MPa                        10 MPa
                                                        Dn>32         38MPa
                                                          σ max
                                                                = 0,2                ---
                                                          σ min                                   400 MPa
 Stress range, Rr
                       Specified by                     Dn≤16        200MPa                       300 MPa                                                                     ---
                                        2σA=180 MPa
                     product standard                 16<Dn≤20       185MPa                       240 MPa                                                                 (150 MPa)
 R r = Rup − Rlow                                     20<Dn≤25       170MPa B500BR     167 MPa
                                                                                                  190 MPa
                                                      25<Dn≤32       160MPa B550B      183 MPa
                                                        Dn>32        150MPa

 Failure distance
                          ≥ 2Dn             ---              ≥ 2Dn                   ---              ---          ≥ 2Dn                                                    ≥ 2Dn
  from the grips

 Temperature of                                              ≤ 40°C
                         ≤ 40°C             ---         (in accordance to            ---              ---                    ---                                              ---
  the test piece                                          ISO 15630-1)
           RUMUL Software

for applications
on dynamic
testing systems

                   RUMUL Software

Special features in the
RUMUL Software with
graphic display

• clearly arranged display structure

• operating system WINDOWS-NT

• different procedures in displaying,
  controlling and storing the relevant

• extensive On-line help system

• integration into network with mailing
  functions available

• scope function for enhanced
  monitoring facilities

• user friendly and safe operation of
  the testing machine via the graphic
  display and mouse

• automatic setting of the resonant testing
  machine via program

• automatic compensation of the mass
  forces generated by oscillating gripping

• qualified remote control of the
  machine in set-up mode

• easy self-installation of program

• various evaluation methods for
  different tests are available

• customized or adapted software
  on request
                  RUMUL Software

                                                                         Structure of the
                                                                         The software provides an easy to use
                                                                         and easy to understand operating
                                                                         surface and guides the user in a dialog
                                                                         through the single program procedures.
                                                                         The user has a number of different
                                                                         possibilities in order to choose and to
                                                                         display the test parameters, to monitor
                                                                         the machine as well as the ongoing test
                                                                         and to define different program

                                                                         An extensive On-line help system
                                                                         supports the easy use of the program.

                                                                         The data which have been produced
                                                                         are convertible (ASCII-code) and
                                                                         therefore available to work with in
                                                                         customary programs such as EXCEL
                                                                         or WINWORD.

                                                                         The program is structured to calculate
                                                                         and classify the appropriate set values
                                                                         automatically. Function and use of every
                                                                         single program is described in detail on
                                                                         the next pages of this brochure.

                                                                         The programs offer a wide range of
                                                                         flexibility on the basis of our vast
                                                                         experience in running tests in fatigue
                                                                         and fracture mechanics.

                                                                         In addition, we have incorporated into
                                                                         the basic software a mailing function
                                                                         which allows to connect the system to a
                                                                         network and thus to check the status of
                                                                         the current test from the office.

PC configuration
A standard Pentium PC with operating system WINDOWS-NT is used as
workstation and communicates with the process computer responsible for
measuring data processing. The appropriate configuration will be
considered based on customers requirements.

                    RUMUL Software

Extended fatigue test
The tests are carried out in either load or stress control mode
on specimens as well as on components. In case of crack or
failure the program acknowledges a number of measuring
values, e.g. the frequency drop on a resonant testing
machine is a very good indication of a growing crack in the
specimen. The permissible increment is chosen by the user
to adapt the sensitivity to the test specific requirements. In
addition four free choosable measuring channels or calculat-
ed parameters can be displayed.
                                                                   Evaluation based on arc sin √p-Transformation
The program provides a feature to store intermediate results
prior to the final crack. These data consist of information
concerning the damage process during the test and allow
to analyse the deterioration. To allow the user most universal
test conditions a data file with fixed data structure is genera-
ted to be used in combination with the RUMUL evaluation
software for further data processing as well as a free choos-
able data structure to run quite customized tests.

Evaluation software
With the editing function already existing measuring data can
                                                                   Evaluation based on Weibull
be integrated into the evaluation.

–   protocol with project and specimen data
–   results in tabulated or graphical form
–   data printing
–   evaluation based on the arc sin √p-Transformation
    with different limits of crack probability
–   evaluation based on Weibull with information on the
    statistical values
–   evaluation in using a regression parabola of
    higher degree
–   stair case method in transition range; evaluation of
    Log-Gaussian distribution in fatigue strength range
–   display of probability nets
–   graphics can be copied into WINDOWS office-software
                                                                   Evaluation based on a regression parabola
                    RUMUL Software

Fatigue crack growth based on ASTM E 647
The tests are based on a cyclic stress intensity ∆ K control.
The program calculates the static and dynamic load based
on the current crack length and the required stress intensity.
Following methods to measure the crack length are
supported by the SOFTWARE:

– crack length measuring system FRACTOMAT
– any analog signal (0 up to +10 V) with a free eligible
  calibration function                                           Evaluation of the Paris-Line
– compliance (displaying crack closure at Fop)
– manually via keyboard

The value of the stress intensity is automatically given based
on an eligible function which is depending on the fatigue
crack growth value (default: exponential function)

–   descending ∆ K at a constant R-ratio
–   descending ∆ K at a constant Kmax
–   descending ∆ K at a constant Kmean
–   ascending ∆ K as above
–   constant ∆ K
–   constant load F

A test based on descending ∆ K allows “Threshold”                Evaluation of Fop (opening)
procedures. An appropriate selection of the gradient which
reduces ∆ K exponentially prevents a premature crack arrest
due to
the plastic zone. The option Kmax = constant excludes
a possible crack closure effect.
                                                                 – protocols with project and
The SOFTWARE supports six types of specimens:                      specimen data
– Compact Tension specimen (CT)                                  – tabulated results
– Three Point Bending specimen (3PB)                             – graphical interpretation with
– Round Compact Tension specimen (RCT)                             dynamic scaling
– Center Crack Tension specimen (CCT)                            – generating measuring results,
– free defined tension specimen                                    smoothing of graphs
– free defined compression specimen                              – determination of the Paris-Line in
                                                                   an eligible window
For the first two types of specimens the geometry functions      – editor to edit diagrams
of ASTM are applicable.                                          – printer/plotter configuration
All functions to each type of specimen are free to change.
In particular the free defined specimens allow a customer
specific use of the geometry function.

                    RUMUL Software

Block test                                                                      Blocks

The block test is basically a fatigue test with different load

                                                                 Load [ kN ]
horizons within the test. A sequence of a maximum of 100
load horizons (Blocks) is automatically repeated. A block is
defined by amplitude, meanload and number of cycles or a
hold time.

Inputs                                                                            Sequence
– specimen information
– generating blocks
– criteria of interrupt                                          Blocks

– headings such as date, test or specimen numbers
– current load (static and dynamic)
– current block
– operating frequency
– number of sequences

– protocol with headings
– tabulated print-out

Precracking of fracture mechanic
                                                                 Freq. [ Hz ]

The operating frequency on a resonant pulsator depends very
strongly on the stiffness of the specimen to be tested. The                                  Crack [mm]
stiffness changes with the propagation of the crack, therefore
                                                                 Load [ kN ]

the frequency change is a value of the crack length. In order
to follow the known standards the test is being done in a
number of load steps which correspond to the different crack
lengths. The single load steps are automatically processed.
Running a first precracking test on a specific type of speci-
                                                                 Frequency drop/load
men the crack length corresponding frequency drop is being
determined. The data will be stored and are again available
for later tests.

– test or project number
– specimen dimensions
– data on load steps and crack length

– headings such as date, test and specimen numbers etc.
– current load (static as well as dynamic)
– current load step
– operating frequency
– frequency steps (difference)
                    RUMUL Software

                                                                interface OPTOTRON
                                                                The fiberoptical communication inter-
                                                                face OPTOTRON is designed to switch
                                                                electrical loads up to 3kVA directly like-
                                                                wise to trigger digital in/outputs.

                                                                To control such a variety of different
                                                                devices, an assortment of application-
                                                                boxes is available.

                                                                Due to the potentialfree galvanic isola-
                                                                tion and the noisefree transmission any
                                                                interferences or transients interfering the
                                                                system or the connected external
Universal program ProTest                                       devices are avoided.

                                                                Advantages of the optical fiber are:
Free programmable machine program with a reduced and for
                                                                – no transmission of noise or interfer-
RUMUL resonant testing machines optimized command set.
                                                                  ence signals
Easy to use due to self explaining expressions and the same
                                                                – galvanical potential separation
display structure as the program Extended Fatigue Test.
                                                                – electrical isolation
                                                                – no danger of electrical short cuts
The program allows:
                                                                – flexibility and universal use.
– establishing universal test programs
– programmable time and load cycle bases
                                                                Advantages of the new hardware are:
– support of up to 24 in-/output devices
                                                                – modular system
– triggering external devices over potentialfree fiberoptical
                                                                – subsequently mountable
  interface OPTOTRON
                                                                – large assortment of application-boxes
– evaluation of test data by RUMUL evaluation software
– extensive On-line help system
                                                                – integrated signal repreparation of the
                                                                  digitized optical signals.

                                                                – extended fatique tests
                                                                – corrosion tests
                                                                – involving pumps, fans, heaters, etc.
                                                                  into the test process (corrosion tests)
                                                                – data exchange with external measur-
                                                                  ing devices.

                                                                Fiberoptical communication interface to
                                                                integrate external devices interactively to the
                                                                                       05/ 2007

The RUMUL product family

MIKROTRON 5 / 20 kN             TESTRONIC 50 / 250 kN      VIBRO-Forte 500 kN
resonant testing machine        resonant testing machine   resonant testing machine


bending / torsion pulsator

                                SWINGER                    UPGRADE of old
                                resonant testing machine   resonant testing machines

crack length measuring system

CH 8212 Neuhausen am Rheinfall | Tel +41 52 672 43 22 | Fax +41 52 672 44 48
                Wöhler-Software V3.04
What's new?
The successful RUMUL-Software „Extended fatigue
test“ V3.04 has been enlarged with two helpful
functions and the number of monitoring elements
increased to 8.

• e-mail
  The e-mail function can be added as reaction to a
  monitoring element. To send e-mails we
  recommend and deliver the program „BEEE“.
  Each e-mail can be sent with text up to 100
  characters, date and time.

   By means of an according service of an internet
   provider the e-mail can be sent as SMS to a

• History
  The history function enables to record and
  graphically show a running test in real-time. Four
  different history elements can have various
  measuring sizes. The user can determine upper
  and lower limits. If a value over- or under-rides
  these values the measuring size will be shown in
  red colour. The scale can be optimized during the
  running test, in order to always display an
  informative diagram.

   At the end of the test the data for each history
   element can be saved as text file and used for
   further analyses, e.g. in EXCEL.

Advantages for user?

• The productivity and capacity of the machine will
  be increased (reduction of rest periods).
• The user gets information about the state of test
  via e-mail/SMS and can react immediately.
• Due to real-time diagrams the state of test is
  known immediately.
• Diagrams can easily be integrated in testing
  reports, e.g. it is not necessary to prepare data
  graphically in an other program.
• Regarding quality management a complete
  documentation of the test is possible.

                                          Resonant testing
                                        50/100/150/250 kN

Other well proven
RUMUL products

                                          Resonant testing
                                                 5/20 kN

                                   Bending/torsion pulsator
                                   for bending- and torsion
                                    applications 70/160 Nm

Gewerbestrasse 10 / Rundbuck
CH-8212 Neuhausen am Rheinfall
Telefon ++41/52 672 43 22
Telefax ++41/52 672 44 48
e-mail                       Crack length measuring
                                     system FRACTOMAT
                                   for measuring cracks in
                                        fracture mechanics

Technical changes are preserved.
September 2006


                                 In the end of the thirties Max E. Russenberger had a first
                                 contact to the testing technology. Later he became senior chief
                                 engineer at the testing machine company Alfred J. Amsler & Co.
                                 where he designed the resonant testing technology for the first
                                 time, what gave him a worldwide tribute.

                                 In 1964 Max E. Russenberger founded his own business.
                                 His particular aim in the new company was to design and build
                                 dynamic material testing systems. The main product line
                                 was the high frequency resonant pulsator or, in other words,
                                 resonant testing machines.

                                 In a later stage Erwin Müller, also a former Amsler employee,
                                 entered the company as a partner. Out of these two names the
                                 abbreviation RUMUL has been originated.

                                 In 1978 Roland Berchtold took over the company and
  History                        from this time on the official name of the company was
                                 RUSSENBERGER PRÜFMASCHINEN AG, but still the
                                 shortened form RUMUL is common.

                                 In 1989 the company moved into new and larger premises in
                                 Neuhausen on the Rhine Falls.

The idea of a resonant testing   Max E. Russenberger,             Roland Berchtold succeeded
machine was created by Max       the father of the modern         in improving the previous
E. Russenberger in 1938.         resonant testing technology,     system concept. The current
                                 with a legendary Vibrophore      construction allows an univer-
                                 machine.                         sal use and opens new ways
                                                                  in testing components.
The Company
The main interest of RUMUL is
the development and design of
resonant testing systems for dynamic
material tests.

The philosophy of the company
– simple concepts, application
  and user oriented
– partnership

Every single one of the staff of
10 employees is responsable for
a proper and efficient progressing
of the incoming orders and all the
necessary services after the
installation of the machines.

Todays material testing market
indicates a trend to high quality and
also fast tests which should also
be very efficient with regards to the
energy consumption. All these aspects
are covered by the resonant testing
systems from RUMUL.
                         Working principle
Resonant testing machines stress specimens or
structures with a dynamic load superimposed to a static

The dynamic load is generated by an oscillating system
(resonator) which runs in its natural frequency. The
oscillating system consists of masses and springs whereas
the structure or the specimen which has to be tested is
also part of.

The machines discussed here work at full resonance,
i. e. the operating point is situated on the top of
the resonance curve. The resonator is excited by an
electromagnet system.

Due to the resonant effect the power consumption is very
low (typical 20 to 500 Watts), the operating frequency is in a
range of 50 to 600 Hertz.
                                                             The machines are very often used for
                                                             fatigue tests (S/N-curves) or in
                                                             the fracture mechanics for precracking
                                                             and crack propagation tests.
                                                             These are the advantages of such
                                                             equipment compared to servo-
                                                             hydraulic ones.

                                                             All kind of tests with a high
                                                             number of load cycles are beneficial
                                                             applications for resonant testing
                                                             machines because of the high testing
                                                             frequency and the resulting very
                                                             short testing time with very low power

                                                             The additional advantage in com-
                                                             parison to servohydraulic systems with
                                                             its actuators, valves and pumps is that
                                                             maintenance is not required due to
                                                             the wear resisting construction.

– fatigue tests (S/N-curves) in R&D and quality control
– fatigue crack growth investigations (fracture mechanics)
– ∆K-Threshold determinations (fracture mechanics)
– precracking of fracture mechanic specimens
– blocked random tests
                                                     The concept of the TESTRONIC
                                                     is based on the latest
                                                     technologies in mechanics
                                                     and electronics.
                                                     The machine is subdivided
                                                     into a separate static and
                                                     dynamic part and allows to
                                                     run any combination of stress

                                                     The TESTRONIC fulfills a
                                                     number of new and advanced
                                                     testing requirements for recently
                                                     developped materials and

                                                         2                               3

Executions in steps of 50 / 100 / 150 / 250 kN

dynamic stroke/displacement:    up to 6 mm
static stroke/displacement:     up to 600 mm
operating frequency:            40 – 300 Hz
power consumption magnet:       < 500 Watt
power requirements:             230 V/16 A
for test on components:         T-nut M 16

1 Connecting rod
2 Corrosion chamber (cooling and heating)
3 High temperature furnace up to 900º C
                                                  The MIKROTRON is the small
                                                  and compact execution of
                                                  the TESTRONIC for smaller loads
                                                  and nevertheless large strokes.
                                                  Simple and successful machine
                                                  concept, also in horizontal
                                                  construction, e.g. for tests
                                                  under corrosive conditions.


                                                      2                             3

Execution as 5 kN and 20 kN machine

dynamic stroke/displacement:   up to 4 mm
static stroke/displacement:    up to 450 mm
operating frequency:           40 – 250 Hz
power consumption magnet:      < 500 Watt
power requirements:            230 V/10 A

1 Special spring
2 Round specimen with induction furnace
3 Component «Valve lifter»
                                            A handy resonant testing
                                            system for dynamic bending
                                            load applications.

                                            Originally designed to precrack
                                            specimens for fracture mechanics,
                                            the current versions offer much
                                            more possibilities due to a modular

                                            – bending up to 160 Nm
                                            – tension/compression up to 8 kN
                                            – torsion

                                            The kinematic conditions allow a
                                            pure bending moment between the
                                            gripping heads. An electromagnetic
                                            driven resonator, built as a rotary
                                            oscillator, creates an appropriate
                                            bending moment. Independent to
                                            the dynamic drive a static moment
                                            is possible to be applied to the
                                            specimen via a torsion rod.

                      1                 2

        Data                        3               4

Executions as 70 Nm and 160 Nm,
resp. up to 8 kN

operating frequency: up to 300 Hz
power requirements: 230 V/6 A

1 Mounted gripping head for
2 Charpy-specimen with fixture
  for «hot cell»
3 Precracking of small CT-speci-
  men for «hot cell»                5               6
4 Customer tailored fixture for
  sheet metal with induction
  furnace (not visible)
5 Customer tailored fixture for
  sheet metal
6 Valve needles
            The crack length measuring
            system FRACTOMAT works on
            the base of the indirect potential
            drop method and indicates the
            measuring value continuously. It
            generates an accurate result of the
            crack length and can also be
            used to control the propagation
            of the crack. The various interfaces
            allow to use the FRACTOMAT
            in any testing configuration and
            on any non-RUMUL testing
            equipment. The crack length foil
            (KRAK GAGE) serves as a pick-up.
            The KRAK GAGE-structure is
            based on a conducting layer and
            an electrically insulating backing.
            The KRAK GAGES are bonded
            as a strain gage onto the
            specimen and then connected
            to the FRACTOMAT. In addition to
            standard gages special designs
            are available.

            To measure and evaluate cracks on
            fracture mechanic specimens
            in fundamental R&D or on compo-
            nent-like specimens, e.g. in

                                           The new RUMUL control unit
                                           TOPP presents itself as a compact
                                           adaptive testing system. A twin
                                           computer concept allows a
                                           consequent separation in
                                           functions by avoiding the well
                                           known problem of running process
                                           software on unstable PC operating
                                           systems. The host computer is a
                                           pure Windows-PC, the operating
                                           system free. A powerful process
                                           computer system constitutes its
                                           core. The online data acquisition
                                           and the digital controllers consider
                                           the data of the installed transdu-
                                           cers. This control conception will be
                                           used for new testing machines as
                                           well as for modernisations of existing

        RUMUL products
– load cells in executions
  from 0.5 N – 1.000 kN
– standard and custom-designed
  gripping heads
– extensometer FRACTOTRON
– furnace THERMOTRON
– climatic and vacuum chambers
– corrosion package (hard- and software)
– fiberoptical communication interface
– modernisations of dynamic
  testing machines
– special machines and devices
The RUMUL program-package contains
several modules:
for extended fatigue tests (S/N-curves)
for crack propagation test
precracking of fracture mechanics specimens
loading in steps depending on time or
number of cycles *)
free programmable test procedures by the
user *)
*) integrated possibility to control digital I/Os
for operating external instruments.

The program modules are controlling and
monitoring a test and generate reports.
Many helpful functions are available like
online-helpsystem, messaging, e-mail and
SMS functions, test schemes, LAN-
integration, data in ASCII-code, drag and
drop of diagrams, history-recording and
                           RUSSENBERGER PRÜFMASCHINEN AG

                                                 Gewerbestrasse 10/Rundbuck
                                                 CH-8212 Neuhausen am Rheinfall
                                                 Telefon    ++41 52 672 43 22
                                                 Telefax    ++41 52 672 44 48

More detailed catalogues
are available.

                             Two views of the famous Rhine Falls
                             at Neuhausen.


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