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基于连接键应变软化模型的岩石单轴压缩模拟
Alternative Title中国科学院力学研究所流固耦合系统力学实验室;
冯春; 李世海; 刘晓宇
Source Publication2014颗粒材料计算力学会议论文集
2014
Conference Name2014颗粒材料计算力学会议
Conference Date2014-08-22
Conference Place中国甘肃兰州
Abstract基于颗粒间的有限接触假设,提出了可表述颗粒间力、力矩传递的连接键模型。通过在连接键中引入考虑应变软化效应的Mohr-Coulomb准则及最大拉应力准则,实现了连接键的黏聚力及抗拉强度随连接键的等效塑性剪应变、等效塑性拉应变的线性衰减过程。利用上述连接键应变软化模型对岩石的单轴压缩过程进行了模拟,计算结果表明:岩石单轴压缩的应力应变曲线经历了线性上升、非线性上升、非线性下降及缓变等四个阶段,并给出了上述四个阶段与岩石内部损伤破裂状态的内在联系。计算结果还表明,随着软化系数的增大,岩石的破裂模式逐渐由拉剪复合型破裂向单一压剪型破裂转化;随着软化系数的增大,峰值强度及达到峰值强度时的应变均逐渐增大,...
Keyword颗粒流 连接键 应变软化 单轴压缩 损伤断裂
DepartmentLMFS工程地质体力学(LEM)
Funding Organization国家科技支撑计划(2012BAK10B00);; 国家自然科学基金青年基金项目(11302230)
Language中文
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/52164
Collection流固耦合系统力学重点实验室
Recommended Citation
GB/T 7714
冯春,李世海,刘晓宇. 基于连接键应变软化模型的岩石单轴压缩模拟[C]2014颗粒材料计算力学会议论文集,2014.
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