Learning Forum

[jinglun]

Hello, im simulating a side-to-side compression test of a helmet. The model consists of the helmet, an indenter and a plate (to restrict the helmet's movement). The geometry is slide in half at the helmet midplane.

[Sean Harvey]

,nOne thing you may wish to isolate is if the contact and related contact stiffness is playing into this. What I would do is remove the contact and put in some appropriate fixed displacements. Then use enforced displacement and replot the graphs. If they still track differently, then we have ruled out contact. In that case, for your 1 to 4 layers, are the materials all identical with same orientation? nIf the track the same after removing contact, then you can change some of the contact settings such as to increase the contact normal stiffness factor and repeat, or set a realistic absolute value for the penetration tolerance, assuming you are using default augmented lagrange contact. It may not be related to contact, but it is worth ruling it out.nThank younSeann