A gradient-extended anisotropic damage-plasticity model in the logarithmic strain space

European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS)

Abstract

Within this contribution, we discuss additional theoretical as well as numerical aspects of the material model developed in [1, 2], where a `two-surface' damage-plasticity model is proposed accounting for induced damage anisotropy by means of a second order damage tensor. The constitutive framework is stated in terms of logarithmic strain measures, while the total strain is additively decomposed into elastic and plastic parts. Moreover, a novel gradientextension based on the damage tensor's invariants is presented using the micromorphic approach introduced in [3]. Finally, going beyond the numerical examples presented in [1, 2], we study the model's ability to cure mesh-dependency in a three-dimensional setup.

Authors 4

1. H. Holthusen corresponding Aachen Institute of Applied Mechanics

   RWTH Aachen University

   Affiliation as printed

   Institute of Applied Mechanics ( RWTH Aachen University) , Mies-van-der-Rohe-Str. 1 , D-52074 Aachen , Germany,

   Institute of Applied Mechanics (RWTH Aachen University), Mies-van-der-Rohe-Str. 1, D-52074 Aachen, Germany,

2. T. Brepols Aachen Institute of Applied Mechanics

   RWTH Aachen University

   Affiliation as printed

   Institute of Applied Mechanics ( RWTH Aachen University) , Mies-van-der-Rohe-Str. 1 , D-52074 Aachen , Germany,

   Institute of Applied Mechanics (RWTH Aachen University), Mies-van-der-Rohe-Str. 1, D-52074 Aachen, Germany,

3. J. Simon Aachen Institute of Applied Mechanics

   RWTH Aachen University

   Affiliation as printed

   Institute of Applied Mechanics ( RWTH Aachen University) , Mies-van-der-Rohe-Str. 1 , D-52074 Aachen , Germany,

   Institute of Applied Mechanics (RWTH Aachen University), Mies-van-der-Rohe-Str. 1, D-52074 Aachen, Germany,

4. Stefanie Reese Aachen Institute of Applied Mechanics

   RWTH Aachen University

   Affiliation as printed

   Institute of Applied Mechanics ( RWTH Aachen University) , Mies-van-der-Rohe-Str. 1 , D-52074 Aachen , Germany,

   Institute of Applied Mechanics (RWTH Aachen University), Mies-van-der-Rohe-Str. 1, D-52074 Aachen, Germany,