Lemaitre’s damage nonlocal model performance under crack initiation and propagation

Mariana R.R. Seabra, Jose M.A. Cesar De Sa

IDMEC-Institute for Mechanical Engineering,Faculty of Engineering, University of Porto,Rua Dr. Roberto Frias s/n 4200-465 Porto, Portugal.

DOI:

https://doi.org/10.7494/cmms.2013.1.0407

Abstract:

Modelling of ductile fracture is a rather challenging task due to the complexity of the physical phenomena involved. In ductile metals, material progressive degradation, which is strongly associated with large plastic straining, may be captured using the Lemaitre damage model. Nevertheless, to model the propagation of macro-cracks, the use of a discontinuous approach is in general imperative. Therefore, in this work, the Lemaitre Damage model is combined with the XFEM for a complete description of ductile failure. In addition, as in general continuous softening models suffer from pathological mesh dependence, a non-local formulation is implemented and its effects on crack initiation and propagation are evaluated.

Cite as:

Seabra, M., & Sa, J. (2013). Lemaitre’s damage nonlocal model performance under crack initiation and propagation. Computer Methods in Materials Science, 13(1), 30 – 35. https://doi.org/10.7494/cmms.2013.1.0407

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