A probabilistic nonlocal model for crack initiation and propagation in heterogeneous brittle materials

Abstract : A probabilistic damage model is developed to study crack initiation and growth in quasi-brittle materials. Two different thresholds are considered to describe these mechanisms. A Weibull model is used to account for the randomness of crack initiation(s) and then a fracture mechanics based threshold is considered to model crack propagation. The model is integrated in a finite element code via a nonlocal damage approach. A regularization operator based on a stress regularization is introduced. Both damage thresholds are checked using the 'regularized' stress field to avoid mesh dependence. The interaction between propagating cracks and potential initiation sites is accounted for.
Complete list of metadatas

Cited literature [41 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-00694320
Contributor : François Hild <>
Submitted on : Friday, May 4, 2012 - 9:22:14 AM
Last modification on : Friday, May 17, 2019 - 1:22:17 AM
Long-term archiving on : Sunday, August 5, 2012 - 2:22:55 AM

File

IJNME2012-ccsd.pdf
Files produced by the author(s)

Identifiers

Citation

Nicolas Guy, Darius Seyedi, François Hild. A probabilistic nonlocal model for crack initiation and propagation in heterogeneous brittle materials. International Journal for Numerical Methods in Engineering, Wiley, 2012, 90 (8), pp.1053-1072. ⟨10.1002/nme.3362⟩. ⟨hal-00694320⟩

Share

Metrics

Record views

285

Files downloads

305