Hu Zhengbo, Zhang Junhui, Tan Xin, Yang Hao
National Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410114, China.
College of Civil Engineering, Hunan University, Changsha 410082, China.
Materials (Basel). 2024 Aug 8;17(16):3947. doi: 10.3390/ma17163947.
This study introduces a novel method for particle abrasion derived from fundamental natural phenomena and mechanical principles, allowing precise control over the degree of abrasion and more accurately mimicking natural processes. The method's validity is confirmed using a specific shape index. Through conventional triaxial tests, the mechanical behavior of granular aggregates with varying degrees of abrasion was analyzed. The findings indicate that increased particle abrasion leads to a decrease in the average coordination number and sliding amount, while the rotation amount increases. This suggests an inverse relationship between the degree of abrasion and the structural stability and interlocking of the particle aggregate. The fabric anisotropy of the system is mainly attributed to the anisotropy of the contact normal force, which decreases as particle abrasion increases. The partial stress ratio of the particle system is influenced by fabric anisotropy and remains independent of particle shape. Additionally, the internal friction angle may be overestimated in conventional triaxial tests.
本研究介绍了一种源自基本自然现象和力学原理的新型颗粒磨损方法，该方法能够精确控制磨损程度，并更准确地模拟自然过程。使用特定的形状指数来确认该方法的有效性。通过传统三轴试验，分析了不同磨损程度的粒料集合体的力学行为。研究结果表明，颗粒磨损增加会导致平均配位数和滑动量减少，而转动量增加。这表明磨损程度与颗粒集合体的结构稳定性和联锁之间存在反比关系。系统的组构各向异性主要归因于接触法向力的各向异性，其随颗粒磨损增加而减小。颗粒系统的偏应力比受组构各向异性影响，且与颗粒形状无关。此外，在传统三轴试验中，内摩擦角可能被高估。
