WIT Press


3D-simulation Of Ductile Crack Growth

Price

Free (open access)

Paper DOI

10.2495/BT990561

Volume

23

Pages

10

Published

1999

Size

903 kb

Author(s)

H. Baaser and D. Gross

Abstract

Based on GlJRSON's damage model a simulation of ductile crack growth in three-dimensional CT-specimens is presented. After de- scribing the 3D finite element formulation and some computational aspects related to the multiplicative split of the deformation gradi- ent and the integration of the constitutive equations, we discuss the regularisation method used involving a characteristic length. Several problems which occur while solving the global FE-problem, are men- tioned and are overcome by a new "node-skipping-technique". A computational example shows the efficiency of the method. 1 Damage Model The damage model proposed by GURSON in [5] and modified in [8] is based on the experimental obsevation, that ductile failure pro- cesses consist of the nucleation,

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