非均匀材料损伤破坏的多尺度耦合理论固体力学.docAmulti-scalecouplingtheoryfordamageandfailureofheterogeneousmaterialsZHANGTian-jun,XUHong-jie,LIShu-gang,RENShu-Xin(1CollegeofSciences,Xi'anUniversityofScienceandTechnology;Xi'an710054,China;2CollegeofEnergy,Xi’anUniversityofScienceandTechnology,Xi’an710054,China)Abstract:Inordertostudytheimpactofmicro-damageonthemacro-failureofheterogeneousmaterials,webuilta3-Dmicro-,ordancewiththesimulationresults,-(1)thelargerthedamagefractionandthenominalstressofthematerialsare,andthecloserthedistancebetweenthedamagegroupis,thegreaterthemacroscopicdamageprobabilityis;(2)whenthedamagefractionissmaller,thematerial’strans-scalesensitivityincreaseswiththeincreaseofdamagefraction;(3)whendamagefractionislarger,thematerial’strans-scalesensitivitydecreasesasthedamagefractionincreases;and(4)thematerial’strans-scalesensitivityisdependentonthesizeofthesystem,andthelargerthesystem,:multi-scale;strengthdistribution;damageprobability;sensitivity非均匀材料损伤破坏的多尺度耦合理论收稿日期:2008基金项目:国家自然科学基金项目(50574072,50874089),陕西省教育厅专项科研基金(08JK366)作者简介:张天军(1971-),男,陕西临潼人
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