糜棱岩多孔介质混合粒径模型分析  

Analysis of porous media based on the mixed radius model for the study of mylonite

作　　者：胡宗军[1] 李和平[1] 白嘉楠[1] 杨伯源[1] 

机构地区：[1]合肥工业大学土木建筑工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2007年第9期1183-1186,共4页Journal of Hefei University of Technology：Natural Science

基　　金：合肥工业大学青年科研基金资助项目(040802F)

摘　　要：在糜棱岩原岩韧性孔洞损伤的多孔介质等粒径模型的基础上,建立了混合粒径(非等径)多孔介质体胞单元(RVE)。基于该体胞,应用有限元计算对一具体的糜棱岩原岩-花岗岩糜棱化产生的多孔介质进行了数值模拟,并应用修正的莫尔-库伦破碎准则判定韧带破碎情况;把混合粒径模型计算结果同等粒径模型作了比较,发现混合粒径模型与地质调查结果吻合的更好。The mixed radius model of porous media is established for the study of mylonite based on the uniform radius porous media model. The meso-damage mechanical representative volume element （RVE） of granite, a kind of concrete mylonite parent rock, is described. Based on the RVE, numerical simulation of brittle brokenness of porous media is done by using the MSC. Nastran program. The modified Mohr-Coulomb brokenness rule is applied to determining which point in the porous media may be broken. Compared with the results by the uniform radius model, the computational results by the mixed radius model are in good agreement with geological researches.

关 键 词：糜棱岩 损伤力学 混合粒径模型 数值模拟 

分 类 号：P553[天文地球—构造地质学] O348.1[天文地球—地质学]