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Static Analysis of a Corner Bracket

• Problem Specification
• Problem Description
• Build Geometry Steps
• Define Material Steps
• Generate Mesh Steps
• Apply Loads Steps
• Obtain Solution Steps
• Review Results Steps

Problem Specification

• Applicable ANSYS Products:   ANSYS/Multiphysics, ANSYS/Mechanical, ANSYS/Structural, ANSYS LinearPlus, ANSYS/ED
• Level of Difficulty:  easy
• Interactive Time Required:   60 to 90 minutes
• Discipline:  structural
• Analysis Type:  linear static
• Element Types Used:  PLANE82
• ANSYS Features Demonstrated:   solid modeling including primitives, Boolean operations, and fillets; tapered pressure load; deformed shape and stress displays; listing of reaction forces; examination of structural energy error

Problem Description

This is a simple, single load step, structural static analysis of the corner angle bracket shown below. The upper left-hand pin hole is constrained (welded) around its entire circumference, and a tapered pressure load is applied to the bottom of the lower right-hand pin hole. The objective of the problem is to demonstrate the typical ANSYS analysis procedure. The US Customary system of units is used.

Given

The dimensions of the corner bracket are shown in the accompanying figure. The bracket is made of A36 steel with a Young’s modulus of 30E6 psi and Poisson’s ratio of .27.

Approach and Assumptions

Assume plane stress for this analysis. Since the bracket is thin in the z direction (1/2 inch thickness) compared to its x and y dimensions, and since the pressure load acts only in the x-y plane, this is a valid assumption.

Our approach is to use solid modeling to generate the 2-D model and automatically mesh it with nodes and elements. (Another alternative in ANSYS is to create the nodes and elements directly.)

Summary of Steps

Use the information in the problem description and the steps below as a guideline in solving the problem on your own.  Or, use the detailed interactive step-by-step solution by choosing the link for step 1.

Build Geometry

1. Define rectangles.
2. Change plot controls and replot.
3. Change working plane to polar and create first circle.
4. Move working plane and create second circle.
5. Add areas.
6. Create line fillet.
7. Create fillet area.
8. Add areas together.
9. Create first pin hole.
10. Move working plane and create second pin hole.
11. Subtract pin holes from bracket.
12. Save the database as model.db.

Define Materials

13. Define material properties.

Generate Mesh

14. Set preferences.
15. Define element types and options.
16. Define real constants.
17. Mesh the area.
18. Save the database as mesh.db.

Apply Loads

19. Apply displacement constraints.
20. Apply pressure load.

Obtain Solution

21. Solve.

Review Results

22. Enter the general postprocessor and read in the results.
23. Plot the deformed shape.
24. Plot the von Mises equivalent stress.
25. List the reaction solution.
26. Exit the ANSYS program.

 ANA SAYFAYA DÖNMEK İÇİN TIKLAYINIZ.