A constitutive model for granular soils

查看全文 作　　者：YAO [1]YangPing;LIU [1]Lin;LUO [1]Ting

机构地区：[1]School of Transportation Science and Engineering, Beihang University

出　　处：《Science China(Technological Sciences)》索引2018年第61卷第10期,共10页

基　　金：supported by the National Basic Research Program of China(Grant No.2014CB47006);the National Natural Science Foundation of China(Grant Nos.51579005&11672015) 摘　　要：A simple constitutive model is presented to describe the mechanical behaviors of granular soils in a large stress range. A novel normal compression line(NCL) is first expressed by introducing a limit void ratio(e_L) in the double logarithmic scale.Subsequently, a state parameter(ξ) is defined to quantify the current state of granular soils, and a unified hardening parameter(H)that is a function of the state parameter(ξ) is developed to govern the hardening process of the drop-shaped yield surface.Combining with flow rule, a constitutive model for granular soils is proposed. Finally, the comparison between the predictions and the test results of Cambria sand and Coarse-grained material indicates that the model is able to describe the mechanical behaviors of granular soils in a large stress range. 关键词：土壤模型组成压力范围 NCL 行为机械

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A constitutive model for granular soils

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