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中文摘要：
基于所提出的岩土材料统一各向同性破坏准则,通过引入椭圆-抛物双屈服面模型以及结构性损伤屈服面,结合复合体损伤概念,建立了三维主应力空间中弹塑性损伤本构模型,该模型能够反映结构性软土应力应变的非线性、剪胀剪缩特性、结构性以及中主应力对变形的影响。通过结构性软土试验结果与模型的计算结果对比分析,表明该模型能够较好地预测结构性软土三维空间的应力-应变特性。
英文摘要：
Based on the proposed failure criterion for general geomaterials,an elasto-plastic damage constitutive model in three-dimensional stress space is presented by combining the elliptic-parabolic yielding surfaces,the damage yielding surface and the concept of composite framework for structured soft soils.This model can capture such behaviors as the nonlinear stress-strain,shear dilatancy,damage and strain dependence on the intermediate principal stress for structured soft soil.Besides,it can well describe the stress-strain behaviors of structured soft soils based on the comparisons between the true triaxial test results and the simulations.
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同项目期刊论文
New double yield surface model for coarse granular materials incorporating nonlinear unified failure
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