Finite element analysis of anisotropic structures at large inelastic deformations
作者： Bernhard Eidel , Friedrich Gruttmann
DOI: 10.1007/978-3-540-36564-8_3
关键词:
摘要: A constitutive model for orthotropic elastoplasticity at finite plastic strains is discussed and basic concepts of its numerical implementation are presented. The essential features the multiplicative decomposition deformation gradient in elastic inelastic parts, definition a convex domain stress space representation equations related to intermediate configuration. free energy function yield formulated an invariant setting by means introduction structural tensors reflecting privileged directions material. accounts kinematic isotropic hardening. associative flow rule integrated using so-called exponential map which preserves exactly incompressibility condition. implemented brick type shell element. Due special interpolation techniques element able predict lockingfree behaviour even very thin structures. Representative simulations demonstrate suitability proposed formulations.
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