Compressive-shear Fracture Research Articles

An experimental study on fractural features of concrete samples containing hard inclusion

The final fractural forms and variation status of hard inclusion samples under biaxial compression have been primarily studied in this paper. The lateral fractural forms of samples are mainly compressive-shear fracture, two kinds appear on surface: one is strike-slip fault with reversed thrust, and another is thrust. Some hard inclusions rupture and some do not while hard contact serves between hard inclusions and sample; main fracture bypasses hard inclusion while soft contact serves. Finally, process of stress concentration, yield, softening until failure for hard inclusions have been analysed under a certain condition.

Combined compressive-shear fracture of rocks

Investigations are made on the combined compressive-shear fracture of rocks. Three types of specimens are considered. They involve no precracking, fatigue crack, and mechanically cut crack. The critical shear stress and critical stress intensity factor of diorite-porphyrite are obtained. Fracture pattern in rocks under compressive-shear loading is determined experimentally based upon which fracture criterion is assumed. Significant information on the stability of rock mass and mechanism of tectonic fracture can be gained.