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Stochastic structural model of rock

时间:2021-12-10 17:32:33 天文地理论文 我要投稿

Stochastic structural model of rock and soil aggregates by continuum-based discrete element method

This paper first presents a stochastic structural model to describe the random geometrical features of rock and soil aggregates. The stochastic structural model uses mixture ratio, rock size and rock shape to construct the microstructures of aggregates,and introduces two types of structural elements (block element and jointed element) and three types of material elements (rock element, soil element, and weaker jointed element)for this microstructure. Then, continuum-based discrete element method is used to study the deformation and failure mechanism of rock and soil aggregate through a series of loading tests. It is found that the stress-strain curve of rock and soil aggregates is nonlinear, and the failure is usually initialized from weaker jointed elements. Finally, some factors such as mixture ratio, rock size and rock shape are studied in detail. The numerical results are in good agreement with in situ test. Therefore, current model is effective for simulating the mechanical behaviors of rock and soil aggregates.

作 者: WANG Yuannian ZHAO Manhong LI Shihai J.G. Wang   作者单位: WANG Yuannian,ZHAO Manhong,LI Shihai(Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China)

J.G. Wang(Tropical Marine Science Institute, National University of Singapore, 10 Kent Ridge Crescent, Singapore 119260) 

刊 名: 中国科学E辑(英文版)  SCI 英文刊名: SCIENCE IN CHINA SERIES E(TECHNOLOGICAL SCIENCES)  年,卷(期): 2005 48(z1)  分类号: P5  关键词: CDEM   rock and soil aggregate   mixture ratio