Learning Forum

[Raghav]

Hello everyone, I am modelling composites for impact simulations but i am unable to validate existing literature. I have alligned the fibers into desired direction as well.

I have given eroding surface to surface contact between projectile and composite layers and automatic surface to surface tiebreak between composite layers.

After the impact, the elements of one composite layer are falling into other without maintaining the proper contact (image below). How can I solve this issue?  What other possible errors could be there for my simulation to not match the previously published results apart from the material properties. Would symmetry plays a major role in results. I have set 3 boundary conditions, fixed and x and z symmetry by restricting the degree of freedom for respective case.

Thankyou

[igandiko]

Please check if the tiebreak contact is working correctly. Try setting IGNORE=1 in automatic tiebreak contact and make sure the segment normals are oriented correctly. It might be netter to use segment sets instead of part ids in the contact definitions. Look for warnings in d3hsp file regarding missing tied nodes. For solid elements, use type 1 with HG control type 2.