Sandwich_Nastran_Panel_04

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					Sandwich Panel 4:
    Two Foam Core and 4 Fiber Glass Skin Layers on either side

Creating Sandwich Panel in NE NASTRAN.

  1. Creating the geometry of the Sandwich Panel.
        a. Go to GEOMETRY > SURFACE > CORNERS…
        b. Input the following values for X, Y & Z
                  X                   Y                   Z
                  0                   0                   0,   Click   OK
                  12                  0                   0,   Click   OK
                  12                  3                   0,   Click   OK
                  0                   3                   0,   Click   OK
        c. Click CANCEL
        d. Go to VIEW > AUTOSCALE > ALL
        e. Go to TOOLS > WORKPLANE, Uncheck DRAW          WORKPLANE.


  2. Creating Materials for the Sandwich Panel.
        a. Go to MODEL > MATERIAL…
        b. Enter in the following data for the first material:
           Title                              Fiber Glass
           Young’s Modulus (psi)              4.87e6
           Poisson’s Ratio                    0.34
           Tension                            80000
           Compression                        80000
           Shear                              32000
           Mass Density                       1.647e-4
        c. Click OK
        d. Enter in the following data for the second material:
           Title                              Foam
           Young’s Modulus (psi)              100
           Poisson’s Ratio                    0.3
           Tension                            20
           Compression                        20
           Shear                              8
           Mass Density                       2.998e-5
        e. Click OK
        f. Click CANCEL

  3. Creating Properties for the Sandwich Panel. (2 layers of Fiber Glass
     skin)
        a. Go to MODEL > PROPERTY…
        b. Enter the following Properties for the first material:
           Title                               Fiber Glass Skin
           Material                            Select “Fiber Glass”
           Elem/Property Type                  Select PLATE, Click OK
           Thickness                           0.06
      c.   Click OK
      d.   Enter the following Properties for the second material:
           Title                               Foam Core
           Material                            Select “Foam”
           Palette                             Select Yellow Color, Click OK
           Elem/Property Type                  Select SOLID, Click OK
      e.   Click OK
      f.   Click CANCEL

4. Creating the required Meshing for the geometry created.
      a. Go to MESH > MESH CONTROL > DEFAULT SIZE
      b. Click OK
      c. Go to MESH > GEOMETRY > SURFACE…
      d. Click inside the model once
      e. Click OK
      f. Select “Fiber Glass Skin” for PROPERTY
      g. Click OK

5. Turning off the geometry.
      a. Click on QUICK OPTIONS icon
      b. Click GEOMETRY OFF
      c. Click DONE.

6. Forming Foam Core by extrusion.
      a. Go to MESH > EXTRUDE > ELEMENT…
      b. Click SELECT ALL
      c. Click OK
      d. Select “Foam Core” for PROPERTY
      e. Type ‘1’ for ELEMENTS ALONG LENGTH
      f. Click OK
      g. Type in the following values for Base and Tip:
         Base              0               0                  0
         Tip               0               0                  1.50
         Click OK

7. Creating Skin Surface on the Foam Core
      a. Go to GEOMETRY > SURFACE > CORNERS…
      b. Input the following values for X, Y & Z
                X                   Y                     Z
                0                   0                     1.5,   Click   OK
                12                  0                     1.5,   Click   OK
                12                  3                     1.5,   Click   OK
                0                   3                     1.5,   Click   OK
      c. Click CANCEL
8. Meshing the Fiber Glass Skin Surface
     a. Go to MESH > GEOMETRY > SURFACE…
     b. Click on the top surface of the geometry
     c. Click OK
     d. Select “Fiber Glass Skin” for PROPERTY
     e. Click OK

9. Turning ON the geometry.
      a. Click on QUICK OPTIONS icon
      b. Click GEOMETRY ON
      c. Click DONE.

10.To display Property Color and Node numbering of the model.
      a. Go to VIEW > OPTIONS
      b. Select ELEMENT in Options
      c. Select PROPERTY COLORS in Color Mode
      d. Click APPLY
      e. Select NODE in Options
      f. Select ID in Label Mode
      g. Click APPLY
      h. Click OK

11.To view the solid view of the Sandwich Panel
      a. Click on VIEW STYLE icon
      b. Select SOLID

12.To merge the coinciding nodes in the Sandwich Panel
      a. Go to TOOLS > CHECK > COINCIDENT NODES…
      b. Click SELECT ALL
      c. Click OK
      d. Type ‘0.02’ for MAXIMUM DISTANCE TO MERGE
      e. Check tick the MERGE COINCIDENT ENTITIES
      f. Click OK

13.To renumber the nodes of the Sandwich Panel
      a. Go to MODIFY > RENUMBER > NODE…
      b. Click SELECT ALL
      c. Click OK
      d. Click OK

14.Creating Skin Surface on the sides of the Foam Core
      a. Rotate the sandwich panel such that the side of the foam core is
         visible
      b. Go to GEOMETRY > SURFACE > CORNERS…
      c. Click on METHODS ^
      d. Select ON NODE
      e. Click on the left top corner node from the side of the foam core
      f. Click OK
         g. Select the left bottom corner node from the side of the foam
            core
         h. Click OK
         i. Select the right bottom corner node from the side of the foam
            core
         j. Click OK
         k. Select the right top corner node from the side of the foam core
         l. Click OK
         m. Click CANCEL

   15. Creating Skin Surface on the other sides of the Foam Core (Similar to
      the instructions on step 14)
         a. Now, rotate the sandwich panel such that the other side of the
             foam core is visible
         b. Go to GEOMETRY > SURFACE > CORNERS…
         c. Click on METHODS ^
         d. Select ON NODE
         e. Click on the left top corner node from the side of the foam core
         f. Click OK
         g. Select the left bottom corner node from the side of the foam
             core
         h. Click OK
         i. Select the right bottom corner node from the side of the foam
             core
         j. Click OK
         k. Select the right top corner node from the side of the foam core
         l. Click OK
         m. Click CANCEL

   16.To merge the coinciding nodes on the sides of the Sandwich Panel
         a. Go to TOOLS > CHECK > COINCIDENT NODES…
         b. Click SELECT ALL
         c. Click OK
         d. Type ‘0.02’ for MAXIMUM DISTANCE TO MERGE
         e. Check tick the MERGE COINCIDENT ENTITIES
         f. Click OK

   17.Double click once on the sandwich panel so that the changes get
      applied. Rotate the sandwich panel and observe if BLUE colored
      fiberglass skin layer is visible or not on all the 4 surfaces of the
      sandwich panel.

  18.To Align the Sandwich Panel according to the Work plane
        a. Go To VIEW > ALIGN BY > WORKPLANE
NOTE: This step will show the top surface of the sandwich panel

   19.To apply the Load on the Sandwich Panel
         a. Go to MODEL > LOAD > NODAL…
      b. Type “Force” for TITLE
      c. Click OK
      d. Select the 4 nodal points present on the middle line present on
         the top surface of the sandwich panel
      e. Click OK
      f. Type the value ‘-25’ for FZ
      g. Click OK
      h. Click CANCEL

20.To apply Constraint for the Sandwich Panel
      a. Rotate the Sandwich Panel so that the bottom skin surface is
         visible
      b. Go to MODEL > CONSTRAINT > NODAL…
      c. Type “Pinned” for TITLE
      d. Click OK
      e. Select the 4 nodal points on the line present on the second line
         from the left edge of the panel
      f. Click OK
      g. Click PINNED
      h. Click OK
      i. Select the 4 nodal points on the line present on the second line
         from the right edge of the panel
      j. Click OK
      k. Check tick TY and TZ
      l. Click OK
      m. Click CANCEL

21.To Analyze the Model of the Sandwich Panel
      a. Go to FILE > ANALYZE
      b. Save the file as SANDWICH on the Desktop
      c. Click WRITE
      d. Click OK
      e. Go to ANALYSIS > RUN
      f. Click CONTINUE

22.To view the deformation of the model
      a. Click on VIEW > SELECT
      b. Select DEFORM in Deformed Style and CONTOUR in Contour
         Style
      c. Click DEFORMED AND CONTOUR DATA…
      d. Select 7033.SHELL VON MISES-2 in contour drop down box
      e. Click OK
      f. Click OK

23.Save the file on the Desktop
      a. Go to File > SAVE
      b. Type in your NAME and click SAVE.

				
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posted:1/3/2013
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