Stress Intensity Factors (SIFs) for cracks emanating from circular holes in two-dimensional orthotropic bodies were numerically computed taking into account the effect of geometry and orthotropy. A semi-analytical expression correction factor was found fitting numerical data. Finally, it demonstrated how same can be used to calculate SIF elliptical once appropriate changes variables are made. •...

In this paper, we derive the second-order crack opening displacement tensor for an arbitrarily oriented elliptical in elliptically orthotropic (EO) matrix. This result is obtained explicit closed form. The approach based on Saint-Venant’s idea of linear transformation between boundary value problems and isotropic bodies. solution utilizes classical representation ellipsoid where smallest aspect...

Underground excavation is a necessary process for constructing mines, tunnels and depots in granite rock mass. In this study, the numerical specimens were established by discrete element method confirmed laboratory experiments order to investigate peak stress, cracking development failure properties of pre-holed under coupled biaxial loading unloading conditions. The results show that, containi...

Abstract The incremental normal compliance of a contact “irregular” (non-elliptical) shape between two elastic half spaces is considered. modeled as external crack. An approximate expression for the stress intensity factor (SIFs) around its boundary, in conjunction with Rice (1975) theorem that interrelates SIFs and crack compliances, are used to evaluate compliance. results cover broad class s...

In this paper, stress-intensity factor solutions are presented for an embedded elliptical crack in a round bar subjected to tensile load. The factors (SIF) tabulated form and were obtained from three-dimensional finite-element analyses of configuration. provide the as function three dimensionless parameters representative size, aspect ratio flaw its relative position cross section. cover ranges...