Learning Forum

[naveen.gunasekaran]

Hello, 

I have been trying to simulate crushing of a 3D core auxetic structure with composite plies with static structural nonlinear analysis for calculating the specific energy absorption since composite debonding simulation is not possible in explicit simulation in ansys. I am ending up with error for high distortion of the elment on the composite plies, Here is the heads up, when I try to simulate just the two composite plies debonding with the axial displacement (i.e. Remote displacement) of 10 mm, the results are perfect. When I add a crushing indenter as a contact, then the distortion problem occurs. I have tried the following things:

1. Refined the mesh quality finer until 0.5 mm, whereas the mesh size was 3 mm for the remote displacement; despite that, it works fine. 
2. I had the step size, initial 1000, min 150, and maximum 3000. Just to ensure loading is small enough to converge. 
3. I enabled large displacement; try the stabilization damping factor to 0.1 value.

Its evident that remote displacement-based crushing and plate-based remote displacement have different behaviors. The plate-based remote displacement has convergence issue;3D kindly suggest me what has to be done. If I complete the plate-based remote displacement, then I can somehow finish the debonding with a 3D core. 

Regards

Naveen

[naveen.gunasekaran]

The error message occured for the composite with the plate contact. I understand the non linear behaviour occurs during the contact analysis but i am thriving to find a solution to it. Kindly let me know how to sort it. This tail is continuation to the previous post.