CHEN Bo,LI Yongqiang,LIU Xufeng,et al.Study on Stick-slip Behaviour of Granular Materials in Triaxial Test[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(03):568-575.
CHEN Bo,LI Yongqiang,LIU Xufeng,et al.Study on Stick-slip Behaviour of Granular Materials in Triaxial Test[J].Journal of Disaster Prevention and Mitigation Engineering,2023,43(03):568-575.DOI:
Study on Stick-slip Behaviour of Granular Materials in Triaxial Test
Spherical glass sand and stainless-steel beads are two typical granular materials. These two materials are used for conventional drained triaxial compression tests and undrained triaxial compression tests under different confining pressures to examine the stick-slip behavior of granular materials during triaxial tests. The research work shows that both materials exhibit obvious stick-slip behavior in drained triaxial compression tests, and the confining pressure directly affects the amplitude of stress drop during stick-slip behavior. However, the two materials demonstrate noticeable differences in their stick-slip behavior. Moreover, repeated drying of the glass sand sample significantly reduces or even eliminates the stick-slip behavior. The results show that the preparation history of glass sand samples has an important influence on the development of the stick-slip behavior. The different surface characteristics of glass sand and steel beads are important factors contributing to the dissimilar stick-slip behaviors between the two materials. The surface characteristics of reused glass sand particles change obviously, which is an important reason for the gradual weakening of its stick-slip behavior. The test results provide valuable insights for a deeper understanding of the stick-slip behavior in granular materials such as glass sand and steel beads. In addition, they provide potential directions for exploring the micro-mechanism of stick-slip evolution.
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