A non-linear creep constitutive model for salt rock based on fractional derivatives

Thermal Science

Wu Fei¹  Liu Wei²  Fan Jinyang²  Lu Dan²  Chen Jie² 

[1] Chongqing University, State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing, China + State State Key Laboratory of Water Resource Protection and Utilization in Coal Mining, Beijing, China;Chongqing University, State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing, China;

关键词: creep;    salt rock;    fractional derivatives;   

DOI  :  10.2298/TSCI180510092C

来源: DOAJ

【 摘 要 】

The creep property of the salt rock is an important determinant of deep underground repository of energy storage for long-term operatio. Starting from fractional derivative, this paper proposes a new concept of super Abel dashpot based on Abel dashpot. According to the Nishihara model, the non-linear element of super Abel dashpot is introduced, and a new salt rock creep constitutive model is established. The theoretical analytic solution of this model is then deduced. Fitting analysis of the experimental data indicates that the model can well reflect the whole-process creep curve, especially the non-linear accelerated creep stage.

【 授权许可】

Unknown