Effect of integrating memory on the performance of the fractional plasticity model for geomaterials

作     者：Yifei Sun Yufeng Gao Shunxiang Song 

作者机构：Key Laboratory of Ministry of Education for Geomechanics and Embankment EngineeringHohai UniversityNanjing 210098China 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：2018年第34卷第5期

页      面：896-901页

核心收录：

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

基　　金：the National Natural Science Foundation of China(Grant 41630638) the Priority Academic Program Development of Jiangsu Higher Education Institutions,and the Fundamental Research Funds for the Central Universities(Grant 2017B05214)are appreciated 

主　　题：Plasticity Fractional calculus Memory 

摘      要：A fractional plasticity model for geomaterials is proposed by using the fractional *** to the integral definition of the fractional derivative,the range of load memory for calculating the flow direction may influence the subsequent model ***,an investigation on the memory dependence of the model was *** was found that the load memory affected the stress-dilatancy behavior of the *** to the loss of memory from zero-to confiningstress states,slightly higher strain is reported,whereas an insignificant difference in the predicted deviator stress is ***,for engineering applications,starting the memory from the zero-stress state,which avoids mathematical complexity,is suggested.