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JKL

Issue with results

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Hi!

I am performing an axial quasi-static crash test of a crash box. However, the results are not at all plausible. I have checked all the parameters of the material as well as the properties.

Please help! Which parameters should I change in my model?

 

Thank You!

 

TP005_1_0000.rad

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Hi,

 

The engine file is not included (again). Use Engine File Assistant to easily define control cards. Engine file can be merged with starter on export: check the "Merge starter and engine file" option so the engine control cards defined will be in the starter file (_0000.rad). Open the _0000.rad file in Textpad or Notepad and ensure that engine control cards are present. 

Capture.PNG.ab40f9328dbbb6c676feb7ca1e8bf9e4.PNG

 

It is not obvious how the model is not plausible- do you have experimental tests or previous experience? I can only think of the axial crushing might be too stiff. A geometric imperfection can be introduced with a /RANDOM nodal noise.

 

There are intersections and penetrations in the contact interface which should be corrected. There are also 10 bad quality elements (negative volume).

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