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.
基金
河南省自然科学基金项目(0211051300)
关键词
微细观裂纹
损伤
变形
全应力应变曲线
micro-and meso-cracks
damage
deformation
complete stress-strain curve
