Composite Failure Criteria: How is it calculate?
Helle every body,
i'm currently working on a model with composites materials.
But i want to know wich failure criteria can i use to have the most accurate results.
I'm on sandwich strucutre with alu foam (mesh with 3D elems using PSOLID-MAT1 parameter) and the skin is in Carbon PPA (using 2D elements and PCOMP-MAT8). You could see it in the attachments.
Actually i know the equations of each criteria (TSAI / HILL ..) but i wanted to know how is it calculate in Hypermesh/Optistruct and which is the best for 3D analysis? Do i need to use MAT9 instead of MAT8?
Thank's you best regards.