| 石膏颗粒接触试验研究 |
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| 引用本文： | 周健,张津,王强强.石膏颗粒接触试验研究[J].同济大学学报(自然科学版),2016,44(1):0067-0072. |
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| 作者姓名： | 周健 张津 王强强 |
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| 作者单位： | 同济大学 土木工程学院， 上海 200092；同济大学 岩土及地下工程教育部重点实验室， 上海 200092,同济大学 土木工程学院， 上海 200092；同济大学 岩土及地下工程教育部重点实验室， 上海 200092,同济大学 土木工程学院， 上海 200092；同济大学 岩土及地下工程教育部重点实验室， 上海 200092；上海申元岩土工程有限公司， 上海 200040 |
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| 基金项目： | 国家自然科学基金（51479138） |
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| 摘 要： | 利用岩石双轴流变试验仪,研究了石膏试件在单轴压缩和颗粒接触条件下的力学特性和破坏模式.结果表明:圆柱单轴压缩试件破坏模式为均匀受力下的一次性剪切破坏,球形颗粒接触试件破坏模式为应力集中下的颗粒破碎多次破坏;在利用离散元模型进行模拟时,同种材料单轴压缩试验的细观参数与颗粒接触试验的细观参数相差较大,不同的受力情况需要分别进行标定.
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| 关 键 词： | 石膏 颗粒接触试验 破坏模式 离散元 |
| 收稿时间： | 2014/12/18 0:00:00 |
| 修稿时间： | 2015/11/16 0:00:00 |
Experimental Study on Contact of Gypsum Particles |
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| ZHOU Jian,ZHANG Jin and WANG Qiangqiang.Experimental Study on Contact of Gypsum Particles[J].Journal of Tongji University(Natural Science),2016,44(1):0067-0072. |
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| Authors: | ZHOU Jian ZHANG Jin and WANG Qiangqiang |
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| Institution: | College of Civil Engineering, Tongji University, Shanghai 200092, China;Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China,College of Civil Engineering, Tongji University, Shanghai 200092, China;Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China and College of Civil Engineering, Tongji University, Shanghai 200092, China;Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education, Tongji University, Shanghai 200092, China;Shanghai Shenyuan Geotechnical Engineering Co., Ltd., Shanghai 200040, China |
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| Abstract: | Uniaxial compressive tests and particle contact tests were conducted to investigate mechanical properties and failure modes of gypsum test specimens using rock rheological testing system. Results show that cylinder specimens under the uniaxial compression tests fail directly in condition of uniform stress, while spherical specimens under the contact tests fail repeatedly with particle breakage in condition of stress concentration. In addition, even for the same kind of material, microscopic calculation parameters vary greatly with discrete element model. The microscopic calculation parameters of the specimens under different kinds of stress situation need to be calibrated separately. |
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| Keywords: | gypsum particle contact tests failure mode discrete element method |
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