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Tutorial
SE : FEA - Static Stress Analysis using Algor

Tushar Suradkar
www.oocities.org/SeGuruCool

  segurucool @ indiatimes.com


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    It is strongly recomended that you first complete the FEA basics tutorial,
    where you learn in-depth the theory behind :

  • Linear Static Analysis
  • Frequency Analysis
  • Linearized Buckling Analysis
  • Thermal Analysis
  • Design Optimization
  • Meshing
  • Material Types

    • In this tutorial, you learn the following:

  • ALGOR's interfacing capability with Solid Edge.
  • Analyze a solid model of a bearing assembly.
  • Access ALGOR's software from within Solid Edge.
  • Generate a surface mesh and a solid mesh.
  • Examine the analysis results using SuperView.

    • Problem Description

    The problem is to model and analyze a model of a bearing assembly.

    The bearing assembly consists of a pillow block housing and a bearing insert.

    The bottom surfaces of both parts are are bolted down.

    A shaft is fitted through the bearing insert, which allows the shaft to rotate.

    The shaft can exert pressure in several directions and we will examine the forces in downward direction only.

    Starting Solid Edge

    Start Solid Edge and open or create a bearing assembly as shown in figure.

    Small features such as fillets, etc are of no consequence to the results of the finite element analysis.


    Adding the ALGOR menu and toolbar

    Select Tools > Add-In Manager.

    Click ALGOR in the list such that the check mark is present.

    Click OK.

    The ALGOR menu and toolbar should appear.


    Generating a finite element mesh

    In Solid Edge, select Algor > Mesh

    The CAD Solid Model environment opens.

    In the lower-left corner of this window, notice the messages that read

    Beginning CAD data import...

    followed by

    Rendering part (1 of 2)...

    and

    Rendering part (2 of 2)...

    When the message reads Ready, select View > Enclose.

    The solid model should look as shown in figure.

    Adjusting the display

    Select Window > New Window and then,

    Window > Tile Horizontally and finally

    View > Display > Features

    This displays the model in multiple windows as shown in figure.

    Hide the bracket

    Select Pillow Block.par:1 in the model tree and select visible from the menu.

    This will hide the pillow block housing.

    Create Surface Mesh

     Select Mesh > Create Surface Mesh.

    Set the mesh size half-way between Coarse and Fine.

    Click the Mesh button.

    The model is meshed as shown in figure.


    Transferring to the FEA Object Editor

     Select Tools > FEA Object Editor.

    The FEA Object Editor loads the mesh in to ESX database.

    Specifying Analysis Type

    Select Analysis > Parameters.

    On the design scenario toolbar, set analysis type to Linear Static Stress

    Specifying Element and Material Property

     Click on the pillow block housing and right click on it.

    From the menu that appears, select Modify > Materials

    Under Select Material, pick Cast Iron

    Click OK to accept the material information and close the Element Material Specification dialog.

    Similarly, apply Steel to the bearing insert.

    Adding a pressure load

    Select View > Orientation > XY Bottom

    Select Selection > Select > Surfaces

    Using the control key, select both the bottom surfaces of the pillow block housing.

    Right click and choose Add > Surface Loads

    Under Normal Pressure, specify 300 for Pressure.

    Adding Boundary Conditions

    Select View > Orientation > Isometric.

    Click on the surface of the bearing insert hole.

    Right click and select Add > Surface Boundary Conditions.

    Under Predefined, click Fixed and then OK

    Checking the model with SuperView

    Select Analysis > Check Model.

    SuperView starts and after verifying the model geometry and
    the finite element data, the assembly will appear in the
    SuperView display window.

    Analysis and PostProcessing

    Select Analysis > Perform Analysis... .

    Click the analyze button.

    After the analysis is over, select View > Results.

    Select Results > Displacement Data > Displaced Model.

    Click on Displaced Model ON

    Display Stresses

    Select Results > von Mises Stress.

    Select File > Save Image As.

    Click the list Save as type at the bottom of the save dialog and select .jpg

    Select File > Exit.



    Tushar Suradkar     segurucool @ indiatimes.com

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