1. Kratos 3D Structural Analysis Tutorial
Nelson Lafontaine
Kratos Team
Singapore 2010

2. Defining the geometry

3. Kratos 3D Structural Tutorial
In this tutorial we will solve a simple example using GiD and Kratos
Geometry
Input data and conditions
PostProcess
Singapore 2010

4. GiD-Kratos Singapore Workshop Pre and Post Processing
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GiD-Kratos Singapore Workshop Pre and Post Processing
GiD Practice - Customization October 2010
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GiD-KRATOS PROBLEM TYPE: AN EXAMPLE

5. Click the Files menu > Save as command to save the project.
GiD-Kratos Singapore Workshops
Pre and Post Processing Techniques
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Click the Files menu > Save as command to save the project.
Click the Geometry menu > Create > Straight line command.
In order to draw better, click the Utilities > Tools > Coordinates window command.

6. When the Coordinates window is displayed, type:
GiD-Kratos Singapore Workshops
Pre and Post Processing Techniques
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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 = In this case, Create point procedure window is displayed. Click in the Joint button.

7. GiD-Kratos Singapore Workshops
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Once you have drawn the rectangle, click the Geometry > NURBS > By contour command and select all lines. Press Esc.
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.

8. The area Object now looks like this.
GiD-Kratos Singapore Workshops
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The area Object now looks like this.
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.

9. Problem Input
Singapore 2010

10. GiD-Kratos Singapore Workshops
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Click the Gid > Data > Problem type > Kratos command to load the Solver. A new list of icons at the top left of the screen appears.
Click the Define the group properties icon to define the groups of the structure. An Entities group editor windows appears.

11. Click in Add New Group icon to define 3 groups:
GiD-Kratos Singapore Workshops
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Click in Add New Group icon to define 3 groups:
The structure (Body) that will be Generic type.
The Boundary Conditions (BC) that will be the fixed displacements or velocities.
The Loads (Puntual, Pressure etc.) that will be Load type.
(You can change the name of groups clicking in the right button-> rename command.)

12. GiD-Kratos Singapore Workshops
Pre and Post Processing Techniques
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Select the Body Group, press the Assign button. Click in the Volume icon and select all volume in the model. Then press Scape.
Select the Boundary, press the Assign button. Click in the Surface icon and select the lower surfaces of the model. Then press Scape.
Finally Select the Load , press the Assign button. Click in the Point icon and select the higher-center point of the model. Then pres Scape.

13. GiD-Kratos Singapore Workshops
Pre and Post Processing Techniques
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Click the Define the model properties icon to display the Project properties window. Select Material command and type all the materials parameters.

14. GiD-Kratos Singapore Workshops
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In the Project properties >Model command complete the Project Information and type the path of Kratos. Select 3D in Spatial dimension and “Yes” in Structural Anayisis.

15. In Analysis type > Structural type command select Solids.
GiD-Kratos Singapore Workshops
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In Analysis type > Structural type command select Solids.

16. 17. In Analysis type>Solution type command select Dynamic.
GiD-Kratos Singapore Workshops
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17. In Analysis type>Solution type command select Dynamic.

17. In Analysis type >Analysis Type select non linear.
GiD-Kratos Singapore Workshops
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In Analysis type >Analysis Type select non linear.

18. In Solution Strategy-Linear Solver type command select Direct.
GiD-Kratos Singapore Workshops
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In Solution Strategy-Linear Solver type command select Direct.
In Solution Strategy- Direct Solver type command select Skyline LU.

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21. In Solution In Solution Strategy > Dynamic command type 0.01 for Start time and Delta time. For End time type 5.
22. In Solution Strategy- Non-Linear command double click and press enter for defaults values.

20. GiD-Kratos Singapore Workshops
Pre and Post Processing Techniques
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Select Properties command to assign the id Property, the Property type, the Material and the Material Model.

21. GiD-Kratos Singapore Workshops
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In the Elements>Total Lagrangian command select Hexahedra as Element type and its corresponding Property and Group.

22. 25. Select Loads command to assign the Body Force and a Puntual Load .
GiD-Kratos Singapore Workshops
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25. Select Loads command to assign the Body Force and a Puntual Load .
26. Select Loads-Puntual command and type the value of the Puntual Load in the X and Z direction. Remember that its group is “Load” ; for this case is “Group3”.

23. 28. Check if all values in Activation commnad is equal to 1.
GiD-Kratos Singapore Workshops
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Select Conditions>Displacements command to fix the displacements values of the nodes.
28. Check if all values in Activation commnad is equal to 1.
29. Check if all values in values commnad is equal to 0.

24. Click Mesh-Generate mesh command in Gid program.
GiD-Kratos Singapore Workshops
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Click Mesh-Generate mesh command in Gid program.
Finally click in Calculate-Calculate command to run the Analysis.

25. View > Mode > Post Process
Post Processing
Once the solution finishes, GiD will switch to Postprocess mode
Alternatively, you can switch manually with
View > Mode > Post Process
By default, the results for your model will be loaded
You can open other results with
File > Open
Common result formats are
.post.bin binary results
.post.res ASCII results
.post.lst A list file pointing to multiple result files
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26. Thanks… Kratos webpage: Kratos wiki: Kratos tutorials:
More Kratos at:
Kratos webpage:
Kratos wiki:
Kratos tutorials:
Singapore 2010