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

By Sudhir Gill on 10 Mar 02:31 1 answer 1885 views 0 comments

The problem file is attached here.

• almost 2 years ago

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.

Click OK.

32. ### Step 32

Click Close.