Impact Fracture of Ceramic Plates Using Extended Distinct Element Method
Koichi KAIZU, Toshiro SAIKI, Shuji TOMINAGA and Kiyohiko IKEDA
Abstract:This paper presents an impact fracture analysis of a ceramic plate by the extended distinct element method (EDEM) . The EDEM model consists of springs, dampers and sliders between two elements in both the normal and tangential directions. This model has the continuity by introducing the pore-springs, which show the effect of the pore material between elements. The medium composed of the EDEM model becomes gradually discontinuous with the destruction of the pore-springs. The purpose of this study is to confirm usefulness of this method for the analysis of the impact fracture and to examine the effect of the impact velocity on the impact fracture behavior. From numerical results, it is shown that the impact velocity greatly influences in the mode of the impact fracture and the generation of the crack is localized at the collision part with the increase in the impact velocity. It is also found the position of fracture is closely related to the position of the high equivalent stress. Key Words:Numerical analysis, Extended distinct element method, Impact strength, Stress wave, Ceramics