煤样的微细观裂纹损伤本构模型  

Damage constitutive model of mico-and meso-cracks of coal sample

作　　者：李振华[1] 王林 李化敏[1] 

机构地区：[1]焦作工学院资源与材料工程系,河南焦作454000 [2]河南神火煤电公司葛店煤矿,河南永城476600

出　　处：《西安科技学院学报》2004年第1期79-81,93,共4页

基　　金：河南省自然科学基金项目(0211051300)

摘　　要：基于对煤样受载变形过程中其内部微细观裂纹及变形损伤特征,通过选取合适的损伤参量,推导出单轴压缩下煤样的损伤本构模型,并得出材料常数A和n的表达式,进而解释其含义。实验结果表明实验曲线与理论曲线拟合度较高。Based on the micro-and meso-cracks and the detailed damage characteristics during the loading and deformation of coal specimen,a suitable damage parameter is selected and the damage constitutive equation of coal in uniaxial compression is subsequently deduced. Experimentally, the results of damage tests are well fitted with theory results.

关 键 词：微细观裂纹 损伤 变形 全应力应变曲线 

分 类 号：TD313[矿业工程—矿井建设]