Load Transfer Mechanism of Limestone under Uniaxial Compression Using the Particle Flow Method
详细信息
- 责任者：Cao Shitan (Department of Civil Engineering ; Shanghai University ; Shanghai 200072 ; China) ; Xu Jinming
- 刊名：Hydrogeology and Engineering Geology
- 出版年：2012
- 卷期：39(6)
- 关键词：石灰岩 ; limestone ; 压缩试验 ; compression tests ; 离散元法 ; discrete element methods
- 页码：p.57-61
- 图表：illus., 3 tables, 15 refs.
- 分类号：1702
- issnNo：ISSN1000-3665
- isbnNo：CN11-2202/P
摘要
The particle flow method was used to simulate the load transfer mechanism in this paper.Taking a limestone sample with the size of 50 mm× 50 mm as an example,the particles of rock were characterized with circular discs and the parallel bond model was adopted to simulate the linkages among the particles.The results show that the strong contact forces were 19.8 percentages of all forces but took 75 percentages of the strain energy in the sample;the ratios of the normal to shear contact forces were larger than 3.5,the normal contact forces dominated all of the stresses in the limestone;the local porosity of the sample after failure varied quite litttle with a decrease of only 0.002.This paper may be used as references in investigating the microscopic mechanism of the deformation and failure of rock materials under external load.
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