Author(s)

G. Kuhn & A. Foerster

Abstract

A novel formulation of a Field-Boundary-Element-Method (FBEM) for hyperelasticity and elastoplasticity at finite strains is presented. The pro- posed formulation uses a Total-Lagrange scheme. Therefore the system matrices have to be generated only once. The constitutive model used is based on the concept of an intermediate configuration. This enables to split the constitutive equations into a time-independent hyperelastic rela- tion relative to the intermediate configuration and into more complex evo- lution equations for the intermediate configuration and for further internal variables. For the derivation of the boundary integral equation only the time-independent hyperelastic relation for the stress tensor is needed. Con- sequently the basic boundary integral equation itself is time-indepe

Keywords