fedoo.constitutivelaw.Simcoon.manages_material_frame

property Simcoon.manages_material_frame

Hyperelastic kernels built from F (_Lt_from_F) are objective by construction and keep the initial material basis. Other Simcoon UMATs transport material history through DR and return the corotational box tangent d(tau_hat)/dD, but sim.umat does not convect their material axes. Fedoo runs them in the frame that follows the material.