kratos 3d structural analysis tutorial

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GiD-Kratos Singapore Workshop Kratos Structural Analysis October 2009

Kratos 3D Structural Analysis Tutorial

Pooyan DadvandNelson La Fontaine

Kratos Team

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Analysis of 3D cantiliver

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1. Click the Files menu > Save as command to save the project.

2. Click the Geometry menu > Create > Straight line command.

3. In order to draw better, click the Utilities > Tools > Coordinates window commnad.

Creating the Model

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4. When the Coordinates window is displayed, type:

0.00 in the x, y and z edit box. Then click the Apply button.

Do the same for:

x = 0.20, y = 0.00, z = 0.00

x = 0.20, y = 2.00, z = 0.00

x = 0.00, y = 2.00, z = 0.00

x = 0.00, y = 0.00, z = 0.00. In this case, Create point procedure window is displayed. Click in the Joint button.

Creating the Model

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Creating the Model5. Once you have drawn the rectangle, click the

Geometry > NURBS > By contour command and select all lines. Press Esc.

6. Click the Geometry > Edit > Divide > Surfaces > Num Divisions command and select the area object. Then Dialog window is displayed; click in the Usense button and type 2 in the Number of divisions box.

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The area Object now looks like this.

7. Click the Utilities > Copy command, and Copy window is displayed.

In the Entities edit box select Surfaces.

In the Transformation edit box select Translation.

In the Second Point z edit box type 0,1.

In the Do extrude edit box select volumes.

In the Multiple copies edit box type 2.

Click the Select button and select all area. Then press Esc. The volume object now looks like the right figure.

Creating the Model

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8. Click the Data > Problem type > Structural Application command to load the Solver.

9. Click the Structural Application > Nodal Values command, select the surface icon and fix all displacement. Click the Assign button and select the bottom surfaces of the model.

10. Select Point icon, and then select Force. Type values of nodal forces and assign it in the top center point of the model.

Creating the Model

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11. Click the Structural Application > Elements command, select the volume icon. A list of available elements is displayed. Select the TotalLagrangian3D8N and assign it to the volumes of the model. This element can be applied only for hexahedra.

12. Click the Structural Application > Structure Materials command and type all material properties of the model. Isotropic material is assumed at first instance. Click in the Update changes icon to save the data. Then assign it to all volume object of the model. To give effect to the changes do not forget to click close button.

Creating the Model

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13. Click the Structural Application > Conditions command, select the point icon and select the Pointforce3D. Assign it in the top center point of the model.

14. Click the Structural Application > Problem Parameters. Verify that StaticSolver in the Solver type box is selected. Press Accept button.

Creating the Model

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15. Click the Mesh > Structured > Volumes command and select all volume in the model. In the Enter value window type 60 number of cells and assign it to the all vertical lines of

the model. Press Esc and then type 3 number of cells applied to the all horizontal lines on top and bottom of the model.

16. Click the Mesh > Structured > Draw > Num of Divisions command to display all line divisions.

17. Click the Mesh > Structured > Generate mesh command. A Dialog window appears like the bottom left figure.

Generating the Mesh

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The volume mesh object looks like this.

18. Save the project.

19. Click the Calculate > Calculate command to run the analysis.

20. To view the analysis, click the Calculate > View procces info command.

21. When the analysis is completed, click the File > Post process command and load the file with extention “post.bin”.

Calculate

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From left to right. Absolute Displacement fields for a static load of F = 0.2, 0.4, 0.8, 1.6 using a6 x 60 mesh.

Post processing

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From left to right. Absolute Displacement fields for a static load of F = 0.2, 0.4, 0.8, 1.6 using a10 x 100 mesh.

Post processing

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Thanks…

Kratos Web page:http://www.cimne.com/kratos/

Kratos Wikihttp://kratos.cimne.upc.es/kratoswiki/index.php/Main_Page

These Tutorials:http://kratos.cimne.upc.es/kratoswiki/index.php/Kratos_Tutorials

kratos 3d structural analysis tutorial

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