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- W2046257817 abstract "This paper is concerned with the implementation of a viscoplastic material model of the Chaboche type in the framework of the finite element method (FEM). The equations of the used constitutive law, that incorporates isotropic hardening, back stress evolution with static recovery terms and drag stress evolution, are introduced. A representation of their numerical integration using the implicit backward Euler method under the assumption of small deformations and an isothermal formulation follows. The use of the backward Euler method leads to a nonlinear algebraic system of three equations, which is solved by a combination of the Pegasus method and a fixed-point iteration. After considering the accuracy of the presented integration algorithm in form of iso-error maps, the derivation of the consistent viscoplastic tangent operator is shown. The integration scheme and the calculation of the consistent viscoplastic tangent operator are implemented in the commercial finite element code ABAQUS, using the possibility of the user-defined material subroutine (UMAT). Finally a numerical example in form of a notched bar under tension is presented." @default.
- W2046257817 created "2016-06-24" @default.
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- W2046257817 date "2006-01-06" @default.
- W2046257817 modified "2023-09-27" @default.
- W2046257817 title "Numerical integration and FEM-implementation of a viscoplastic Chaboche-model with static recovery" @default.
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- W2046257817 doi "https://doi.org/10.1007/s00466-005-0021-x" @default.
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