ISOTROPIC HARDENING MODEL FOR SOILS CONSIDERING STRESS-INDUCED ANISOTROPY
A simple method for describing stress-induced anisotropy of soils, which obeys isotropic hardening rule in modified stress space, is proposed. In present study, a modified stress tij, by which influence of intermediate principal stress on deformation and strength characteristics of soils is suitably taken into account, is extended to a new stress tensor t*ij to be able to consider inclusively the fabric change of soils due to the variation of the intermediate principal stress and the stress histories, namely, stress-induced anisotropy.The evolution rule of t*ij is provided referring to the past experimental and numerical evidences. In this paper, the modified stress t*ij is applied to an isotropic hardening elastoplastic model named subloading tij model as an example. The proposed model is verified by results of true triaxial tests.
Constitutive Model Stress-Induced Anisotropy Modified Stress Isotropic Hardening Rule
M.KIKUMOTO H.KYOKAWA T.NAKAI F.ZHANG M.HINOKIO
Department of Civil Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya,466-8555, Japan
国际会议
第三届中日岩土工程研讨会(Proceedings of the 3rd Sino-Japan Geotechnical Symposium)
重庆
英文
278-289
2007-11-05（万方平台首次上网日期，不代表论文的发表时间）