Foda

ANSYS Tutorials
Grady Lemoine

Table of Contents Example 1: 2-D Static Stress Analysis in ANSYS..............................................2 Example 2: 3-D Static Stress Analysis ................................................................5 Example 3: 2-D Frame With Multiple Materials and Element Types...............10 Example 4: 3-D Truss........................................................................................15 Example 5: Simple 2-D Heat Transfer ..............................................................20 Example 6: Modal Analysis...............................................................................22 Example 7: Plate Buckling Analysis Part 1: Eigenvalue Buckling Analysis....26 Example 8: Plate Buckling Analysis Part 2: Nonlinear BucklingAnalysis......31 Example 9: Simple Dynamic Analysis ..............................................................35 Example 10: Box Beam .....................................................................................39

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Example 1: 2-D Static Stress Analysis in ANSYS
In this example we will examine the stress concentrations in a flat plate with three holes, as shown in Figure 1.1.Figure 1.1

Preprocessor
First, we will select an element type, define element and material properties, create a model, and mesh it in the Preprocessor.

Selecting an element type:
1. Click on ‘Preprocessor’ in the ANSYS main menu at the left side of the screen. 2. Click on ‘Element Type->Add/Edit/Delete’. 3. Click ‘Add’. 4. Choose ‘Solid’ from the ‘Structural’ list of element types, then‘Quad 4node 42’ from the list on the right. This chooses a four-node quadrilateral 2D element. 5. Click ‘OK’, then click ‘Close’ on the Element Types box and close the Element Types menu.

Defining material properties:
1. Click ‘Material Props’ in the Preprocessor menu. 2. Click ‘Material Models’. 3. Double-click ‘Structural’ in the right side of the window, then ‘Linear’, then ‘Elastic’, thenfinally ‘Isotropic’.

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4. Enter in values for Young’s modulus and Poisson’s ratio. In this problem we use a Young’s modulus of 70e9 and a Poisson’s ratio or 0.3, which are ballpark values for aluminum (note that ANSYS understands scientific “e” notation). No other material properties will be needed, so click ‘OK’, then close the Material Properties menu.

Creating a model:
1. Click‘Create’ under the ‘-Modeling-‘ heading on the Preprocessor menu. 2. First create the rectangle for the plate. Under the ‘-Areas-‘ heading click ‘Rectangle’, then ‘By Dimensions’ on the menu that pops up. 3. Put 0 and 0.5 in the X1,X2 boxes and 0 and 0.2 in the Y1,Y2 boxes. This will create a rectangle with corners at (0,0) and (0.5,0.2). 4. Now create the circles for the holes. Under the ‘-Areas-‘heading click Circle, then ‘Solid Circle’ on the resulting menu. 5. Create the circles by entering the X and Y coordinates in the boxes marked ‘WP X’ and ‘WP Y’ and the radius in the box marked ‘Radius’. (You can also create circles by clicking in the graphics window, but this method cannot discriminate finely enough to be usable here.) Enter in the following for the circles, clicking ‘Apply’ after eachone. WP X WP Y Radius Circle 1 0.25 Circle 2 0.23 Circle 3 0.27 0.1 0.1 0.1 0.01 0.005 0.005

6. Now you are done creating areas and can subtract the circles from the rectangle to create the desired plate with holes. Close the ‘Create’ menu, and click ‘Operate’ under the ‘-Modeling-‘ heading on the Preprocessor menu. 7. Click ‘Subtract’ under the ‘-Booleans-‘ heading, then click ‘Areas’. 8.First click the area you want to subtract from (the rectangle in this case). The selected area will change color. If you select the wrong area, you can unpick it by right-clicking to switch unpick mode, then clicking it again (you can then switch back to pick mode by right-clicking again). Be sure that the entire area and only the area you want to subtract from is highlighted. When you are...