Influence of non-singular stresses on crack paths
Véronique Doquet, CNRS, Laboratoire de Mécanique des Solides, Ecole Polytechnique, Palaiseau, France
Crack path predictions are most often based on the stress intensity factors, or on the singular terms of the crack tip stress field. While a few bifurcation criteria incorporate an influence of the non-singular T-stress, normal to the crack front on crack kinking, as reported in some experimental studies, the effects of a non-singular S-stress parallel to the crack front on crack twisting, in 3D, that of a compressive normal stress in mode II or III, or even that of a hydrostatic compression, are less documented and considered in predictive models.
The aim of this symposium is thus to present and discuss recent experimental, numerical or modelling works on such questions, often encountered under multiaxial loadings linked to pressure vessels, thermal fatigue, fretting or rolling contact fatigue, as well as rock mechanics.