基于不同分布的分段式岩石损伤本构模型  

Study on Segmentary Damage Constitutive Model Based on Different Distribution

作　　者：赵红鹤 高富强[2] 杨小林 

机构地区：[1]河南理工大学土木工程学院,河南焦作市454000 [2]洛阳理工学院土木工程系,河南洛阳市471023

出　　处：《矿业研究与开发》2015年第4期64-67,共4页Mining Research and Development

基　　金：国家自然科学基金项目(51204096);河南省高等学校青年骨干教师资助计划项目(2013GGJS-188);河南省科技攻关课题(112102310604;142102210569);河南省教育厅科学技术研究重点项目(12B130002)

摘　　要：基于干燥和饱水状态下的砂岩单轴压缩试验结果,采用传统的损伤本构模型得到的理论曲线与试验曲线吻合度较差,考虑其应力应变曲线的压密段,进行了分段式损伤本构模型的研究。微元强度采用幂函数分布和Weibull分布,并对两种损伤本构模型进行比较,分析饱水对砂岩本构模型的影响。结果表明:考虑压密段的分段式损伤本构模型优于传统损伤本构模型,采用幂函数的损伤本构模型优于Weibull分布的损伤本构模型,饱水降低了砂岩理论和试验曲线峰后段的吻合程度。Based on experimental results of sandstone under uniaxial compression in the dry and water saturated situation,the theoretical curves from the traditional damage constitutive model were in poor consistency with the experimental curves.Segmentary damage constitutive model was studied considering the compression section of stress-strain curves.Power function distribution and Weibull distribution were used in the micro unit strength.Then,two damage constitutive models were contrasted to research the influence of saturated state on constitutive model of sandstone.The results showed that the damage constitutive model considering segmented compression section was superior to the traditional one,and the model with power function distribution was better than that with Weibull distribution.Besides,water saturation of sandstone reduced the match degree of the theoretical curves and the experimental curves after the peak period.

关 键 词：损伤本构模型 幂函数分布 WEIBULL分布 砂岩 

分 类 号：TD315.1[矿业工程—矿井建设]