Chandra Sekaran
Ansys Employee
Equation 2-4 in the ANSYS theory manual ( https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v202/en/ans_thry/thy_str1.html?q=orthotropic ) shows the stress-strain relationship used by orthotropic material. I guess you have a case where there are separate contributions that you want to add up. You can put in your own stiffness matrix using Matrix27 element discussed in the Elements manual ( https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v202/en/ans_elem/Hlp_E_MATRIX27.html )nn
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