A THERMO-PLASTIC/VISCOPLASTIC DAMAGE MODEL FOR GEOMATERIALS  

作　　者：Hui Zhou Dawei Hu Fan Zhang Jianfu Shao 

机构地区：[1]State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China [2]LML, UMR 8107, CNRS,-University of Lille I, Villeneuve d＇Aseq, France [3]School of Civil Engineering and Architecture, Hubei University of Technology, Wuhan 430068, China

出　　处：《Acta Mechanica Solida Sinica》2011年第3期195-208,共14页固体力学学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(NSFC) (Nos. 10772190,50979104 and 51009132)

摘　　要：A thermo-plastic/viscoplastic damage coupled model was formulated to describe the time independent and time dependent behaviors of geomaterials under temperature effect. The plastic strain was divided into instantaneous plastic strain and creep plastic strain. To take temperature effect into acconnt, a temperature variable was introduced into the instantaneous and creep plastic behavior descriptions and damage characterization, and a linear thermal expansion law was used in constitutive equation formulation. According to the mechanical behavior of rock salt, a specific model was proposed based on the previous model and applied to Avery rock salt, in which the numerical results obtained from our model had a good agreement with the data from experiments.A thermo-plastic/viscoplastic damage coupled model was formulated to describe the time independent and time dependent behaviors of geomaterials under temperature effect. The plastic strain was divided into instantaneous plastic strain and creep plastic strain. To take temperature effect into acconnt, a temperature variable was introduced into the instantaneous and creep plastic behavior descriptions and damage characterization, and a linear thermal expansion law was used in constitutive equation formulation. According to the mechanical behavior of rock salt, a specific model was proposed based on the previous model and applied to Avery rock salt, in which the numerical results obtained from our model had a good agreement with the data from experiments.

关 键 词：thermo-plastic/viscoplastic damage coupled mechanical model geomaterial ROCKSALT 

分 类 号：TG142.1[一般工业技术—材料科学与工程] V267.4[金属学及工艺—金属材料]