Criterion for crack kinking out of the interface of two orthotropic layers subjected to thermal and mechanical loading

conference paper

English

The problem of crack path stability along the interface between two orthotropic elastically dissimilar materials under the presence of in-plane residual stresses is analyzed using the concept of Finite Fracture Mechanics and matched asymptotic procedure. An energy based fracture criterion is introduced for this problem and it is investigated whether and how is the criterion for the prediction of crack kinking from the interface affected by residual stresses. The complex stress intensity factor and the T-stress characterizing the stress state at the crack tip are calculated both for the thermal (residual stresses) and mechanical loading using the two-state integral. The matched asymptotic procedure together with FEM is used to derive the change of the potential energy induced by the crack growth by crack increment of finite length.

Interface crack, Finite Fracture Mechanics, Crack Propagation, Fracture Criterion, FEM

DAMBORSKÝ, P.; ŠEVEČEK, O.; PROFANT, T.; KOTOUL, M.

2014

6. 1. 2014

Trans Tech Publications

Švýcarsko

978-3-03785-934-6

Materials Structure and Micromechanics of Fracture VII

1

1013-9826

Key Engineering Materials (print)

592-593

1

Swiss Confederation

169

172

4