Implicit numerical algorithm for Chaboche elastoplastic model
J. P. Lopes1; L. Malcher1
1 University of Brasilia
doi:10.20906/CPS/CILAMCE2015-0428
Resumo
This paper seeks the implicit implementation of the Chaboche's model, utilizing the von Mises' yield function. Initially, the von Mises' and Chaboche's kinematic hardening model is developed, by formulating the necessary constitutive relations. Then, the numerical model for the solution of the constitutive relations is developed, using the Chaboche's law with 3 terms and Euler's discretization. The implementation results are presented, referring to Chaboche's law with two non-linear terms and one linear term and Armstrong-Frederick's law (Chaboche with one non-linear term). Steels 304 and S460N were used, being subjected to uniaxial traction-compression, uniaxial shear, multiaxial proportional and multiaxial non-proportional loading trajectories. The results are compared among themselves and with experimental data.
Palavras-chave: Cyclic Plasticity; Kinematic Hardening; Implicit Implementation