Non-local damage and fracture model of rock and concrete-like materials

来源期刊:中国有色金属学报(英文版)2009年增刊第3期

论文作者:毕忠伟 张明 金峰

文章页码:824 - 828

Key words:non-localization; rock and concrete-like materials; damage model

Abstract: In view of the non-local phenomena appearing in the rock and concrete-like materials, the non-local damage and fracture model of rock and concrete-like materials was established through non-local method of Gaussian weighting function. The result indicates that, the stress of one point in the material is correlated not only to its strain history, but also to the interaction of the points in its certain adjacent region of the material. Based on the established non-local model, the numerical simulation of notch containing three-point bending beam was carried out. The results show that the grid sensitivities have been avoided and the fracture direction of the material has not been influenced by the grid shape, and the model proposed can be used to better simulate the damage developing process of the rock and concrete-like materials.

基金信息:the National Natural Science Foundation of China
China Postdoctoral Science Foundation

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