Investigation in the Creep-Fatigue Coupled Effect of Rock Salt

This open access book provides the uniaxial, triaxial, fatigue, creep, creep-fatigue loading tests in order to investigate the salt mechanical response and the related damage mechanisms defining relation between plastic deformation, dilatancy and damage. Based on the experimental results, a new creep-fatigue constitutive model for salt rock that considers creep-fatigue interaction was established by incorporating a state variable that characterizes rock hardening level on the basis of the Norton creep model. Different salt rock mechanical test data sets with varying stress paths were used to validate this creep-fatigue constitutive model. The fit curves and test curves of the stress paths demonstrate good consistency, indicating that the model comprehensively considers the effects of time, load, and state on salt rock's creep-fatigue, effectively describing the creep-fatigue plastic deformation features of salt rock under different stress paths.

Introduction.- Dilatancy properties of salt under monotonous compression and brief introduction into dislocation theory.- The conventional creep and fatigue mechanical properties of rock salt.- Discontinuous fatigue mechanical properties for rock salt.- Creep-fatigue mechanical characterization of rock salt under uniaxial stresses.

Dr. Jinyang Fan is an Associate Professor of the School of Resources and Safety Engineering at Chongqing University, a Ph.D. supervisor, and the Head of the Department of Safety Science and Engineering. He has long been engaged in research on underground space utilization and safety. He has been recognized among the world's top2% of scientists and is a recipient of the Chongqing Postdoctoral Innovation Support Program. Currently, he leads over ten national research projects, including the National Natural Science Foundation of China's General Program, Young Scientists Fund, and Special Funding for Postdoctoral Researchers. His work has earned him the First Prize for Scientific and Technological Progress from the Ministry of Education of China and five first prizes from various research associations. He has received support from the China National Publication Fund to publish one monograph and has authored 60 high-quality SCI papers, with over 2,000 citations.