Dear all,
I'm trying to modeling an 3d Mode I delamination problem using VCCT method. C3DR8 element is used thereby. Every time after submitting the job it warned me with that "Solver problem: zero pivot...". I assume it may be caused by over-constraint, but I can't find where I exactly goes wrong. I've uploaded the .inp file. Could anyone can give me a hand? Thanks a lot.
Leo
Dear all, I am an applied mathematician and I have been stucked by the this general question for a while, i.e., to determine the stiffness matrix of transversely isotropic material from known strain and stress tensors. The definition of transversely isotropic tells us that the stiffness matrix can be defined by 5 constants, see attached figure. C44 is easy to determine, so we can focus on the remaining 4 constants. I attempted to establish 4 linear equations for these 4 constants with the known strain and stress components.
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