Abstract
A finite element procedure is presented for refined analysis of non-linear elastoplastic structures involving arbitrarily latge displacements, rotations and strains. The relevant points are the integration of the equation of the equation of motion where incremental objectivity and path independence are maintained during finite time steps and where a consistent elastoplastic tangent moduli are obtained in order to preserve the asymptotic rate of quadratic convergence of Newton methods. In particular, the special case of plane stress are discussed. Finally, significant numerical examples show the accuracy of the proposed algorithm.
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