【摘要】 结合密砂和中密砂的相变点的概念,提出了以相变状态为参考状态的状态参量表达式,并将此状态参数引入剪胀比的计算公式.在修正剑桥模型的基础上,提出了新的塑性势函数和硬化参数表达式以消除应力路径的影响.在增量塑性理论的基础上,建立了一种适合于密砂和中密砂的与材料状态相关的剪胀性理论模型.更多还原

【Abstract】 Combining with the concept of phase transformation points of dense sand and medium-dense sand,the paper puts forward an expression of state parameter,using the state of phase transformation as the reference state,and introduces this state parameter into the dilatancy ratio formulas.Based on the Modified Cam-clay Model,the paper puts forward new formulas of plastic potential function and the hardening parameter in order to eliminate the influence of the stress path.On the basis of the theory of plastic increment,a dilatancy theoretical constitutive model related to the state of materials,suitable for dense sand and medium-dense sand,is set up.更多还原