JI Shi-ming, CAI Yao-jie, JIN Ming-sheng, ZHANG He-teng, JIANG Xin-xin

(Key Lab of Ministry of Education for Province Jointed Mechanical Manufacture & Automation,

Zhejiang University of Technology, Hangzhou 310014, China)

Abstract: In order to solve the problem that the abrasives layers of soft consolidation pneumatic wheel which consist of different material must be experimented one by one to get the properties, the application of discrete element method(DEM) in this domain was investigated for the first time, the model of the abrasives layer was established using the DEM software PFC2D. The abrasives and binder were simulated by circles, the mechanical properties of the abrasives layer was analyzed from microcosmic perspectives, a method was presented to measure the elastic modulus of the abrasives layer through the biaxial experiments. The relationship between the radius of grain and the elastic modulus was established, the feasibility was evaluated by contrasting the result of simulation with the result of tensile experiments. The experimental results show that the error is less than 10% and proved the feasibility of DEM on soft consolidation pneumatic wheel finishing process, laid the foundation of the usage of PFC3D on finishing process.

Key words: pneumatic wheel; abrasives layer; discrete element method(DEM); PFC2D