Hi everyone,
I'm having some issues using Cohesive Zone Modelling in HyperMesh OptiStruct. I’ve run two simulations using exactly the same adhesive (same stiffness parameters, damage initiation, and damage evolution), but with slightly different Single Lap Joint geometries.
One of them, as shown in the attached second image, gives a reasonable response, while in the first one, the cohesive elements just stretch but no damage initiates at all.
At first, I thought it might be an issue related to the reference system of the cohesive elements, but even after defining it explicitly, the result remains the same.
Can anyone help me understand what’s going wrong and how to fix it? I’m quite stuck and really don’t know what else to try. I would really appreciate your help.
I’ve also attached both models in case anyone would like to run them.
