Simulation Research on the Process of the Abrasive Impacting the Workpiece SurfaceBased on SPH Method

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Journal of Vibration and Shock ›› 2013, Vol. 32 ›› Issue (7) : 169-174.

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Simulation Research on the Process of the Abrasive Impacting the Workpiece SurfaceBased on SPH Method

LV Dong-xi 1 HUANG Yan-hua 2 WANG Hong-xiang 1 TANG Yong-jian 2
ZHANG Hai-jun 2

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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.

Key words

rotary ultrasonic machining (RUM) / SPH / johnson-holmquist ceramic (JH-2) / brittle material / crack

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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[J]. Journal of Vibration and Shock, 2013, 32(7): 169-174