Damage driven crack initiation and propagation in ductile metals using XFEM

• Type: Article in International Scientific Journal
• Date: 2013

Authors

seabra, mrr (Author) FEUP; sustaric, p (Author) Other; de sa, jmac (Author) FEUP; rodic, t (Author) Other

Journal

Title: Computational Mechanics

Vol. 52

Pages: 161-179

ISSN: 0178-7675

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 25 Citations

Scopus - 46 Citations

Other information

Authenticus ID: P-004-ZVS

DOI: 10.1007/s00466-012-0804-9

Abstract (EN): Originally Continuum Damage Mechanics and Fracture Mechanics evolved separately. However, when it comes to ductile fracture, an unified approach is quite beneficial for an accurate modelling of this phenomenon. Ductile materials may undergo moderate to large plastic deformations and internal degradation phenomena which are well described by continuum theories. Nevertheless in the final stages of failure, a discontinuous methodology is essential to represent surface decohesion and macro-crack propagation. In this work, XFEM is combined with the Lemaitre ductile damage model in a way that crack initiation and propagation are governed by the evolution of damage. The model was built under a finite strain assumption and a non-local integral formulation is applied to avoid pathological mesh dependence. The efficiency of the proposed methodology is evaluated through various numerical examples.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 19