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Plane strain compression tests were performed on large specimens that were either unreinforced or reinforced with 6 or 11 layers or geogrid, both 57.0 cn in height and 24.4cn

covering ratio， finite elment method， geogrid， grid rigidity， interface frictiion angle， plane strain compres-sion test， reinforced sand

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2006年12月18日

【期刊论文】A work-hardening and softening constitutive model for sand: modified plastic strain energy approach∗

彭芳乐， Fangle Peng， M.S.A. Siddiquee， Shaoming Liao

，-0001，（）：

-1年11月30日

摘要

The paper describes an energy-based constitutive model for sand, which is modified based on the modified plastic strain energy approach, represented by a unique relationship between the modified plastic strain energy and a stress parameter, independent of stress history. The modified plastic strain energy approachwas developed based on results from a series of drained plastic strain compression tests along various stress paths on saturated dense Toyoura sand with accurate stress and strain measurements. The proposed model is coupled with an isotropically work-hardening and softening, non-associtated, elasto-plastic material description. The constitutive model concerns the inherent and stress systeminduced cross-anisotropic elastic deformation properties of sand. It is capable of simulating the deformation characteristics of stress history and stress path, the effects of pressure level, anisotropic strength and void ratio, and the strain localization.

Sand， Energy-based， Hardening and softening， Elasto-plastic model， Stress-strain relation

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同济大学，上海

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