Tang Hongxiang, Song Rui, Dong Yan, Song Xiaoyu
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China.
Anhui Transport Consulting & Design Institute Co., LTD., 180 Xiangzhang Avenue, Hefei 230000, China.
Materials (Basel). 2019 Sep 27;12(19):3170. doi: 10.3390/ma12193170.
A slant plate flat throw test system for measuring the restitution coefficient of granular materials and a sliding friction test instrument for measuring the friction coefficient between discrete particles and continuum boundary surface materials are developed. The restitution coefficients of the glass bead particles, the glass beads relative to the glass plate, the composite of glass plate and the rubber membrane and the friction coefficients between the glass beads and the rubber film and the filter paper are measured by the designed methods. Based on the measured restitution coefficient and friction coefficient, the discrete element numerical simulation is carried out for triaxial test and plane strain test. Through comparing the experimental results and the discrete element numerical simulation results, the feasibility and rationality of the designed measurement methods and the discrete element numerical simulation are verified. The measuring methods developed in this paper can be further applied to the tests of other fine particles.
开发了一种用于测量粒状材料恢复系数的斜板平抛试验系统以及一种用于测量离散颗粒与连续边界表面材料之间摩擦系数的滑动摩擦试验仪器。通过所设计的方法测量了玻璃珠颗粒、玻璃珠相对于玻璃板、玻璃板与橡胶膜复合材料的恢复系数以及玻璃珠与橡胶膜和滤纸之间的摩擦系数。基于所测量的恢复系数和摩擦系数，对三轴试验和平面应变试验进行了离散元数值模拟。通过比较实验结果和离散元数值模拟结果，验证了所设计测量方法和离散元数值模拟的可行性与合理性。本文所开发的测量方法可进一步应用于其他细颗粒的试验。
