Study on Accelerated Creep Properties and Creep Damage Constitutive Relation for Volcanic Breccias

摘要：

　　In order to know about the accelerated creep properties of volcanic breccias,triaxial compression rheological experiments are carried out on rock servocontrolled triaxial rheology equipment.Based on the experimental results,theaccelerated creep phase of creep curve of volcanic breccias is analyzed.It is shown that the strain rate increases sharply,the rock damage rapidly increases; the acoustic emission dramatic increases with the increase of time during the stage of accelerated creep,and the accelerated growth of rock damage leads to the sharp increase of creep rate.Then based on the accelerated creep deformation,the relation of damage variable versus time is obtained,and and the creep damage constitutive equation of volcanic breccias is established.It is shown that the established nonlinear creep damage models based on time function is correct and reasonable.

关键词： Volcanic breccias Accelerated creep properties Creep damage model

作者: Rubin Wang Weiya Xu Jiuchang Zhang Wei Wang

作者单位: Institute of Geotechnical Engineering,Hohai University,Nanjing 210098,China;College of Water Conserv Institute of Geotechnical Engineering,Hohai University,Nanjing 210098,China

会议类型: 国际会议

会议名称: The Second International Symposium on Constitutive Modeling of Geomaterials: Advances and New Applications (第二届国际岩土本构模型研讨会(IS-Model 2012))

会议地点: 北京

会议语种:英文

页码: 633-639

在线出版日期: 2012-10-15（万方平台首次上网日期，不代表论文的发表时间）