论文类型：期刊论文

第一作者：Wang Zhong-chang

通讯作者：Wang, ZC (reprint author), Dalian Univ, Dept Liaoning Prov, Key Lab Predict & Control Complicated Struct Syst, Dalian 116622, Peoples R China.

合写作者：Zhao De-shen,Yang Qing

发表时间：2009-12-01

发表刊物：TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA

收录刊物：SCIE、EI、ISTIC、Scopus

文献类型：J

卷号：19

期号：SUPPL. 3

页面范围：S811-S818

ISSN号：1003-6326

关键字：isotropic damage; orientation of localization; maximum hardening modulus; bifurcation; uniaxial sample

摘要：To obtain the damage effect in the process of elasto-plasticity deformation of quasi-brittle materials, the isotropic damage loading-unloading function and damage variable were introduced to non-continuous bifurcation. The critical bifurcation orientation and its corresponding hardening modulus for quasi-brittle materials were derived considering the effect of stiffness degradation and volumetric dilatancy under the assumption of isotropic damage. The relationships of localized orientation angle and maximal hardening modulus dependent on degree of damage and initial Poisson's ratio of rock were explored. Comparative analyses were conducted to study the bifurcation of uniaxial tension-compression samples under the conditions of plane stress and plane strain. It is shown that as the initial Poisson's ratio or degree of damage increases, the localization orientation angle of the plane uniaxial compression sample tends to be initiated to decrease. However, the localization orientation angle of the plane uniaxial tension sample tends to be initiated to increase. The sum of orientation angle under tension and compression conditions is 90 degrees. There are plane stress and plane strain cases of the maximum hardening modulus that is independent of the uniaxial compression and tension.

是否译文：否