X-FEM assisted simulation of ductile damage induced 2D crack propagation

Jean-Philippe Crété (1) , Patrice Longère (2) , Jean-Marc Cadou (3)

1 QUARTZ - Laboratoire QUARTZ
2 ICA - Institut Clément Ader
3 LIMATB - Laboratoire d'Ingénierie des Matériaux de Bretagne

The present work is devoted to the numerical simulation of crack propagation in engineering materials whose failure results from void initiation, growth and coalescence. The behavior of the plate material is described via a Gurson type model accounting for the combined effects of strain hardening, thermal softening, viscoplasticity and void growth induced damage. The eXtended Finite Element Method has been retained to describe the kinematic consequences of the crack propagation across the mesh. The crack is assumed to propagate as soon as the stored energy around the crack tip reaches a critical value. The related crack length is estimated from the crack velocity considering the current time increment. The constitutive model and the extended finite elements were both implemented in the engineering FE computation code Abaqus as user subroutines. The numerical simulation of a notched plate under tension loading has been conducted. While making some simplifications, the present work reproduces numerically the 2D propagation of a crack resulting from void growth induced damage.

Domaines: Mécanique des matériaux [physics.class-ph]

Jean-Philippe Crété, Patrice Longère, Jean-Marc Cadou. X-FEM assisted simulation of ductile damage induced 2D crack propagation. European Congress on Computational Methods in Applied Sciences and Engineering, Sep 2012, Vienne, Austria. ⟨hal-02018615⟩