Mechanical Properties of Brittle Materials and Their Single Fracture under Dynamic Loading

Abstract

Two kinds of glassy samples and six kinds of rock samples were used in measuring of mechanical properties. From compression tests, the following results were obtained. 1) The compressive strength and Young's modulus of all kinds of cylindrical specimens increase with increasing strain rate, while Poission's ratio decreases with increasing strain rate.
From compression tests of spherical specimens under dynamic loading rate the following results were obtained. 2) The sphere compressive strength and new surface produced increases with increasing loading rate, but the fracture surface energy has a tendency to decrease with increasing loading rate. Their values were on the order of 10⁴ergs/cm². 3) T he size distribution of fractured products of spherical specimens was represented by the Gaudin-Meloy-Harris size distribution equation.