Dynamic breakage of quartz glass sphere subjected to impact loading

Abstract

Brittle granular materials are widely used in protection engineering and industrial production, and their crushing mechanism is very complex. In this paper, dynamic crushing experiments of single and double glass spheres with diameter of 11.80mm and 15.80mm have been carried out with SHPB loading device combined with transient infrared temperature measurement method. The impacting velocity ranges from 5.01 m/s to 13.02 m/s. The crushing process of glass spheres under dynamic impact was recorded by high-speed photography, and the crushing mechanism and temperature rise characteristics of single and double quartz glass spheres under impact were discussed in combination with temperature-rise curve. The results show that the partial crushing of glass spheres is not uniform in the process of crushing, and the degree of non-uniformity decreases with the increase of impact velocity. The crushing mechanism of glass spheres is composed of tensile failure and shear failure, and shear failure plays a major role with the increase of impact velocity. The temperature rise of glass spheres is mainly composed of plastic temperature rise and fracture temperature rise, and the fracture temperature rise plays a major role. The results have a good reference for understanding the dynamic failure mechanism and temperature rise characteristics of brittle granular material.