STUDY ON LOCALIZATION AND BIFURCATION OF GEOMATER1ALS WITH DAMAGE EFFECT
To obtain the damage effect in the process of elasto-plasticity deformation of geomaterials, the isotropic damage loading-unloading equation and damage variable are introduced to the non-continuous bifurcation. The critical hardening modulus, localized orientation angle with consideration of stiffness degradation, and dilatancy are set up. The relationship of the localized orientation angle and the maximal hardening modulus depends on the degree of damage, and the initial Poissons ratio of rock is explored. Comparative analyses are conducted to study the bifurcation of uniaxial tension-compression samples under the conditions of plane stress and plane strain. The variation of the orientation angle of localization and the maximum hardening modulus depends on the initial Poissons ratio and the degree of damage, and the sum of the orientation angle under tension and compression conditions is 90°. Also, there are plane stress and plane strain cases of the maximum hardening modulus which is independent of the uniaxial compression and tension.
DAN ZHENG ZHONG-CHANG WANG LIAN-SHAN SHEN HAI-JIAO WANG
College of Safety Science and Engineering, Liaoning Technical University, Fuxin, 123000, China College of Civil and Architectural Engineering, Dalian University, Dalian 116622, China College of Information Engineering, Dalian University, Dalian 116622, China
国际会议
The 7th International Symposium on Rockburst and Seismicity in Mines(2009年第七届国际岩爆与微振动性学术研讨会)
大连
英文
261-268
2009-08-21（万方平台首次上网日期，不代表论文的发表时间）