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Memory

Deformations (i.e. the deformation matrix F) can either refer to the previous time point (-updated Lagrange formulation) or to time 0 (-total Lagrange formulation).
In both cases, TOCHNOG composes the deformation tensor with a polar decomposition into F = R U with F the deformation matrix, R the rotation matrix and U the stretch matrix. In a -updated_without_rotation approximation, the rotation matrix is neglected (this saves CPU time). See also group_materi_memory.



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1998-11-16