中文摘要：

岩石具有重要的不可忽略的黏滞特性，准静态条件下试样应力-应变曲线表现出明显的加载速率相关特性，宏观表现为试样加卸载过程中的弹性后效，弹性蠕变和松弛等非平衡态非线性效应。基于经典的Preisach-Mayergoyz空间理论模型，引入具有时间依赖性的滞弹细观单元，得到改进的PM空间理论模型。采用所提出的改进的PM空间模型，研究不同加载速率下试样应力一应变曲线关系特征，以及准静态条件下试样加载过程中的非平衡效应。最后，提出滞弹细观单元变形-时间曲线的试验获取方法以及改进PM空间的重构方式。研究结果表明，加载速率越小，试样滞回曲线所围成的面积越小；加载速率越大，试样达到平衡状态所需要的时间越长。

英文摘要：

Rocks possess viscosity property, which cannot be ignored. Deformation behaviors of rock-like materials display the characteristics of the rate-dependence, which manifest macroscopically non-equilibrium nonlinear effect of elastic aftereffect, creep, and relaxation. Based on the classic Preisach-Mayergoyz space theoretical model, anelastic mesoscopic unit（AMU） possessing time-dependent peculiarity is introduced to obtain the modified PM theoretical model. By adopting the modified PM space model, characteristic of stress-strain curves with different loading rates and the non-equilibrium effect are studied in detail. Finally, experimental approach to obtain the deformation-time curve of the AMU and reconfiguration of the modified PM space is proposed. Results obtained in this paper indicate that, the area of stress-strain hysteresis loop increases with increment of loading rate. The larger the loading rate, the longer the time is taken for the sample to reach equilibrium state.