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Composite Failure Criteria: How is it calculate?

User: "Florian KULIC_21663"
New Altair Community Member
Updated by Florian KULIC_21663

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. 

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