FE-SIF Accurate SIF calculations for piping designers by oym20829


									FE-SIF: Accurate SIF calculations for piping
Classical pipe stress analysis programs use piping beam elements that are constrained to
the limitations inherent with beam elements. For example, beam elements do not capture
the effect of ovalization where the cross section of the pipe deforms away from the
unloaded round geometry. To compensate for the limitations, correction factors are applied
to the beam models to more closely match the flexibility and stresses of the pipe to reality.
The correction factors, flexibilities and stress intensification factors (SIFs), are based on
analytical and empirical relations correlated to piping component geometries. The accuracy
of the correlations depends on the geometries of the piping components.
FE-SIF brings finite element analysis (FEA) to the piping designer's toolkit to provide
accurate SIF and flexibility factor calculations for all geometries and load conditions. FE-SIF
can be used to calculate correction factors for components outside the correlational limits
of standardized design codes and for components with no guidance in the design codes.

Using FE-SIF
FEA technology is well understood and
reliable but has been used sparingly
because general purpose finite element
software programs have been too
complicated to input the model and to
interpret the results on a daily basis. FE-
SIF is designed to calculate SIFs and
flexibilities with minimal input to generate
reliable results that can be easily
transferred to pipe stress programs.
The input interface provides visual
guidance that indicates the geometric
input as you proceed to build the model
The results are presented in tables that
are easy to understand and apply to your
pipe stress program.

Geometries analyzed:
Parent piping component
         s   Conical
         s   Cylinder
         s   Elliptical
         s   Flat
         s   Flanged and dished
         s   Hemispherical

Branch or nozzle position
         s   Radial
         s   Lateral
         s   Hillside

Branch or nozzle type
         s   Straight (unreinforced)
         s   Pad reinforced
         s   Barrel (self-reinforced)

Calculated Results

Graphical Results
FE-SIF includes the FE/Pipe graphical viewer that can
be used to interrogate calculated displacement and
stress patterns. The viewer provides insight into the
interaction between loading and resulting displacement.

Tabular Results
Summarized results are reported in tabular format for quick evaluation and application
in pipe stress analysis programs. Allowable loads, flexibilities and stress intensification
factors are presented in easy-to-read grid tables.

Rich Format Reports
FE-SIF write a comprehensive report in rich text format that includes full graphical
and tabular results. The report is fully compatible with most word processing programs
such as Microsoft® Word®. Sample Report

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