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Defining ALE Adpative Mesh Domain for crash simulation

Defining ALE Adpative Mesh Domain for crash simulation

Defining ALE Adpative Mesh Domain for crash simulation

(OP)
Hi everyone! I'm using linear tet element for a car shape solid to simulate front impact in Abaqus/Explicit. I have defined velocity using "predefined field" in both "initial" and "dynamic, explicit" step. Then in the dynamic step I added gravity load, "frictionless" contact between the road and the car, and "normal - hard contact" for the front contacting area between the wall and the car.

The model seems running up to this point if I set a very short time that it doesn't hit the wall.

Then I added ALE adaptive mesh constraint for the front part of the car, hoping ALE could control meshing for the large deformation in the front. However no matter how I chose the whole solid body or just chose surfaces, the error message told me "ALE adaptive mesh constraint requires definition of adaptive mesh domains." My question is how should I define adaptive mesh domain correctly?

Could anyone help me look at the .inp file and see where I did wrong that there's no adaptive mesh domain? Should I define the adaptive mesh domain from other modules, e.g. Mesh module?

Thank you very very much!

RE: Defining ALE Adpative Mesh Domain for crash simulation

Define ALE mesh domain in STEP module ; Other -> ALE Adaptive Mesh Domain -> Manager. Then several options for the ALE meshing can be set from Other -> ALE Adaptive Mesh Controls -> Manager.

RE: Defining ALE Adpative Mesh Domain for crash simulation

(OP)
Thanks a lot it's working now!! The simulation took about 1.5hr to run!

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