Feed

Tutorial - Solving 2D Truss problem using Mechanical APDL (ANSYS) Part 1?

Tutorial by Sudhir Gill
Small

In general, a finite element solution may be broken into the following three stages.
1. Preprocessing: defining the problem;
- Define keypoints/lines/areas/volumes
- Define element type and material/geometric properties
- Mesh lines/areas/volumes as required
2. Solution: assigning loads, constraints and solving;
3. Postprocessing:
- Lists of nodal displacements
- Element forces and moments
- Deflection plots
- Stress contour diagrams
In this tutorial we will go through first and seecond step here.

  1. Step 1:

    Start Mechanical APDL.

  2. Step 2:

    Click Preferences and select Structural. Click OK.

  3. Step 3:

    Under Preprocessor goto >> Element Type >> Add/Edit/Delete.

  4. Step 4:

    Click Add and then select 3D finit stn. Click OK and then close.

  5. Step 5:

    Under Real constants click Add/Edit/Delete.

  6. Step 6:

    Click Add and then define Area = .1. Click OK and Click Close.

  7. Step 7:

    Under Material Props >> Material Models.

  8. Step 8:

    Under Structural >> Linear >> Elastic >> Isotropic.

  9. Step 9:

    Input EX=200e9 and PRXY=0.3. Click OK and then close Material Model window.

  10. Step 10:

    Goto Preprocessor >> Modeling >> Create >> Keypoints >> In Active CS.

  11. Step 11:

    Input Keypoint 1 = (0,0,0)

  12. Step 12:

    Input Keypoint 2 = (0.8,1.5,0) & 3 = (2.8,0,0)

  13. Step 13:

    Goto Modeling >> Create >> Lines >> Lines >> In active Coord to create lines.

  14. Step 14:

    Select keypoints and create lines. Click OK after done.

  15. Step 15:

    Goto Meshing >> Size Controls >> Manual Size >> Lines >> All lines.

  16. Step 16:

    Input No. of element divisions = 1. Click OK.

  17. Step 17:

    Goto Meshing >> Mesh >> lines.

  18. Step 18:

    Click Pick all.

  19. Step 19:

    Now save the job. Click File >> Save as.

  20. Step 20:

    Save the job.

  21. Step 21:

    Under Solution select Analysis type >> New analysis.

  22. Step 22:

    Select Static and click OK.

  23. Step 23:

    Goto Define Loads >> Apply >> Structural >> Displacement >> On Keypoints.

  24. Step 24:

    Select both keypoints.

  25. Step 25:

    Select All UX,UY and UZ. Click OK.

  26. Step 26:

    Goto Define loads >> Apply >> Structural >> Force/Moment >> On Keypoints.

  27. Step 27:

    Select the top Keypoint. Click OK.

  28. Step 28:

    Input Force = 2800. Direction be FX. Click OK.

  29. Step 29:

    Now save the job.

  30. Step 30:

    Goto Solution >> Solve >> Current LS.

  31. Step 31:

    Click OK.

  32. Step 32:

    Click Close.