MODELLING OF THERMAL CRACKING PROCESS OF ROCK BASED ON COUPLED THERMO-MECHANICAL-DAMAGE MODEL
In this paper, a numerical method, RFPA-thermal code with a coupled thermo-mechanical-damage constitutive model for rock in the framework of continua mechanics, is applied. The evolution of damage is motivated by thermal stress. In the model, three components, viz., a heat flow description, a stress description, and a failure description, are respectively considered to describe the coupled heat transfer and rock failure problems associated with thermal cracking. Examples are presented in the paper illustrating how the overall macroscopic thermal response of rock materials can be simulated by integration of the interactions between smaller-scale elements. The deformation and failure process of rock induced by thermal cracking was simulated and investigated to gain an insight into the mechanism of the complex thermal cracking between heat flow and rock deformation. The simulated thermal cracking characteristics of the rock greatly helped in the interpretation of the experimental results and the observed phenomena in fields.
T.Xu C.A.Tang S.B.Tang S.H.Yu L.C.Li S.H.Wang
Center for Material Failure Modeling Research,Dalian University, Dalian 116622, P.R.China School of School of Civil & Hydraulic Engineering, Dalian University of Technology,Dalian 116024, P.R.China Institute of Science, PLA University of Science and Technology, Nanjing 211101, P.R.China Center for Rock Instability & Seismicity Research, Northeastern University,Shenyang 110004, P.R.Chin
国际会议
南京
英文
689-697
2006-05-22（万方平台首次上网日期，不代表论文的发表时间）