FAQ Cast3M
How can I get the components names of stresses computed by SIGM operator ?
To know components nanmes of SIG1 (stresses field) or of any CHAMELEM you can use EXTR operator : list ( extr sig1 'COMP');
Attention, it is dangerous to give a physical meaning to a component of stress tensor which are
not objective values it means that they depends on the coordonates system. It is better to use
invariant values as Von Mises (VMIS operator), Tresca criteria (TRES) ...
Then you have to use EXCO operator :
sig0 = sigma mo0 ma0 dep; mm = extr sig1 'COMP';
sigzz = exco sig0 ( extr mm 1);
sigxx = exco sig0 (extr mm 2);
sigyy = exco sig0 (extr mm 3);
sigxy = exco sig0 (extr mm 4);
sigxz = exco sig0 (extr mm 5);
sigyz = exco sig0 (extr mm 6);
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