1. School of Mechanical and Electrical Engineering, Harbin Institute of Technology, Harbin 150001, China2. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
Abstract：Taking the Johnson-Holmquist ceramic brittle material constitutive model as the foundation, the process of the crack formation and extension in the Rotary Ultrasonic Machining was firstly simulated by means of the Smoothed Particle Hydrodynamics method. The simulation results showed that the tensile stress generated by the abrasive impact was the main reason for crack formation. Also, the occurrence of the impact crack was advantageous in reducing the depth of subsurface cracks and improving the surface quality in fundamental. The generation of impact cracks and subsurface cracks benefited for the reduction of the cutting force. And the phenomenon of local micro-impact led to the main cutting force fluctuating in a wide range. The scratching experiments results conducted by Conway proved the feasibility of the SPH method in simulation of crack propagation.
吕东喜;黄燕华;唐永健;王洪祥;张海军. 基于SPH算法的磨粒冲击工件表面过程的数值模拟[J]. , 2013, 32(7): 169-174.
LV Dong-xi HUANG Yan-hua WANG Hong-xiang TANG Yong-jian ZHANG Hai-jun . Simulation Research on the Process of the Abrasive Impacting the Workpiece SurfaceBased on SPH Method. , 2013, 32(7): 169-174.
2013, Vol. 32 
