期刊论文详细信息
Mathematics 卷:10
Constitutive Modeling of Normally and Over-Consolidated Clay with a High-Order Yield Function
Chen-Xi Tong1  Hong-Wei Liu1  Hai-Chao Li2 
[1] School of Civil Engineering, Central South University, Changsha 410075, China;
[2] Transportation Science and Engineering College, Civil Aviation University of China, Tianjin 300300, China;
关键词: high-order stress–dilatancy relation;    yield function;    sub-loading yield surface;    unified hardening parameter;   
DOI  :  10.3390/math10091376
来源: DOAJ
【 摘 要 】

In this paper, a simple sub-loading yield surface model for both normally consolidated and over-consolidated clay is proposed with emphasis on the effect of the yield surface shape. Compared with the modified Cam-clay model, only one additional material parameter is introduced to reflect geometry features of the yield surface. A higher-order stress–dilatancy relation is given in the current study, leading to a new yield function capable of offering an adequate description of the yield surface of soil samples in the pq plane. By introducing the concept of the sub-loading yield surface and the unified hardening parameter, the proposed model can capture the main features of the over-consolidated clay with dilatancy and strain-softening behavior and the main features of the normally consolidated clay with contraction and strain-hardening behavior. The results show that adjusting the yield surface leads to more accurate predictions than the modified Cam-clay model. The proposed model can also reasonably describe its mechanical behavior for clay samples.

【 授权许可】

Unknown   

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