用离散单元法分析单剪试验中粒状体的剪切机理(英文)

用离散单元法分析单剪试验中粒状体的剪切机理(英文) English Version

摘要: 用铝棒堆积体作为二维粒状体的模型材料进行单剪试验 ,然后对其用离散单元法进行数值模拟 ,对于宏观应力应变关系 ,两者结果基本吻合。基于数据模拟结果 ,对粒状体的剪切机理 ,例如滑动面上粒子接点角的分布及变化规律 ,进行了微观分析。
- 离散单元法 /
- 粒状体 /
- 微观 /
- 单剪试验
Abstract: By using a special two dimensional simple shear test apparatus with rigid lateral platens, simple shear tests are carried out on an assembly of aluminum rods, one of which is then simulated by distinct element method (DEM). The simulation results by DEM agree well with the test results. Based on the simulation results, the shear mechanism of granular materials in simple shear test, such as the frequency distribution and the variation of contact angles of particles along the mobilized plane, is studied.
- distinct element method /
- granular material /
- microscopic /
- simple shear test