Abstract
Abrading is a very important sub-technology of the surface treatment technology with vast applications in the industry. This study aims at analyzing the inherent laws of friction systems during abrading. In particle flow code modeling, the abrading process can be simplified to the movement of particles in a parallel-plate shear friction system. In this study, the PFC2D software is used to construct the particle flow friction system with the set of parallel plates and the model parameters according to the abrading processing equipment and processing materials, control the simulation of a single variable, and compare the output data to estimate the impact of change of parameters on the force chain. The simulation results show that the shear dilatancy can be divided into three stages: plastic strain, macroscopic failure, and granular recombination stages. The distribution and load rates of the weak force chains depend on the load, velocity, friction coefficient between granules, granular diameter, and number of granular layers. The number of granular layers and the load increase cause the direction of the force chain to be oriented with the vertical direction, and the force chains move toward the horizontal direction as the velocity increases. The increase in load does not cause the shear dilatancy stage to occur; the velocity, friction coefficient between granules, and granular diameter increase cause the shear dilatancy to occur gradually.
Highlights
All granular systems, irrespective of whether conventional solid or a fluid matter, exhibit different properties because of the presence of particulate matter in the parallel plate of the granular flow frictional system
The PFC2D software is used to construct the particle flow friction system with the set of parallel plates and the model parameters according to the abrading processing equipment and processing materials, control the simulation of a single variable, and compare the output data to estimate the impact of change of parameters on the force chain
Based on the aforementioned existing research work, this study further develops the parallel-plate granular flow model of a frictional system based on discrete element method (DEM), aiming to simulate the abrasive flow machining process, provide a method to analyze the force chains in granular flow, and clarify important relationships between the force chains and processing conditions
Summary
Irrespective of whether conventional solid or a fluid matter, exhibit different properties because of the presence of particulate matter in the parallel plate of the granular flow frictional system. The force chain networks produced by the granular systems under external load affect the movement and granular flow of the frictional systems, thereby affecting the quality of abrasive flow machining. This has attracted the attention of scholars globally. The concept of particulate matter was proposed by French scientist Gennes, who is a 1991 Nobel laureate. It refers to a large number of discrete particles forming a system, in which the particle size ranges between 1 lm and 2 lm [1]. According to the sparse degree of particle arrangement, a particle system can be divided into particle gas, particle fluid, and particle solid; the latter two belong to the dense particulate matter systems
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
