Abstract
Abstract: A numerical code named Rock Failure Process Analysis (RFPA) is used to study the dynamic failure process of rock subjected to compressive stress wave with different magnitude. In RFPA, in order to numerically denote the heterogeneity of rock, the rock sample is assumed to be composed of many mesoscopic elements and its material properties are conformed to Weibull distribution. The constitutive law of these mesoscopic elements is formed based on elastic damage mechanics. Based on elastic damage mechanics at mesoscopic scale, a strain-rate-sensitive constitutive law is used and finite element program is employed as a basic stress analysis tool to implement the RFPA code. The different failure patterns of rock specimen subjected to various stress waves are numerically obtained from the numerical simulation of RFPA and the reasons that cause these different failure patterns are analysed. Keywords: dynamic failure, stress wave, numerical simulation, loading condition 1. INTRODUCTION
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