Aiming at the process of particle impacting the workpiece involved in hydrodynamic suspension polishing. ,the distribution of the residual stress along the depth direction was studied with respect to the different impact velocity and impact angle. The three-dimensional fi-nite element model that is to represent the single particle impact the surface of workpiece was onstructed by using ABAQUS. The velocity field during particles impacting the surface of workpiece was calculated. The three-dimensional discrete element model of the particles impac-ting the surface of workpiece was developed by using PFC/3D. The results indicate that with the increasing of impact velocity and impact an-gle the pressure stress field was increased in the workpiece surface. The residual stress is decreased sharply along the depth direction and the largest residual stress in the workpiece surface. Considering the collision between abrasives in the fluid has not so big effect to the velocity field of particles impact the workpiece surface.%针对液动压悬浮抛光固-液两相流中固相磨粒与工件表面撞击的过程中,对磨粒以不同的速度和不同的角度撞击工件表面后残余应力沿工件深度方向的分布规律进行了研究,利用ABAQUS软件建立了单颗磨粒撞击工件表面的三维有限元模型.对磨粒流撞击工件表面时的速度场进行了输出,利用PFC/3D软件建立了磨粒流撞击工件表面的三维离散元模型.研究结果表明:随着撞击角度和速度的增大,在工件表层形成的压应力场会增大,沿深度方向残余应力值急剧下降,磨粒流中磨粒间的撞击对磨粒撞击工件表面的速度场影响不大.
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