Simulation of SiCp/Al Cutting Considering Effect of Particle-matrix Friction Behavior
Friction coefficient is the main factor that affects cutting force,cutting heat and surface morphology.In this paper,by setting up a force-heat controllable friction experimental platform,the particle-matrix friction behavior in SiCp/Al cutting process under the influence of temperature and pressure is investigated.Based on the surface roughness and surface morphology of friction workpiece,the influence mechanism of temperature and pressure is revealed.The results show that the essence of temperature-pressure effect is to affect the grinding depth of SiC particles.The friction coefficient is greatly af-fected by the pressure effect,and the combined action of temperature,pressure and particle self-sharpening determines the workpiece surface roughness after friction.The SiCp/Al cutting simulation model considering the effect of particle-matrix friction behavior can effectively predict the simulation cutting force,and the average error is3.28%.Increasing the cutting speed can effectively improve the triangular defect width formed by SiC particles ploughing matrix,and reduce by 38.3%on average.This study provides a theoretical basis for further understanding of friction characteristics in SiCp/Al cutting process and improving simulation prediction accuracy.
SiCp/Altemperature-pressure actionparticle-matrix friction behaviorfinite element simulation
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