Heterogeneous Ultrasonic Shot Peening: Experiment and Simulation

Author:  Micoulaut Retraint Viot Fran
Source:  Conf Proc: ICSP-9 (pg 119-124)
Doc ID:  2005061
Year of Publication:  2005
Abstract:  
ABSTRACT We study the behaviour of an ultrasonic shot peening process from two viewpoints: a) an experimental setup made of a chamber with a sonotrode (frequency 20kHz, amplitude 25um) and shot of diameter 3mm and b) a Molecular Dynamics simulation of a model of inelastic hard spheres that are fluidized by a vibrating bottom wall. The simulation cell has the same characteristics and parameters as the experimental setup. It is found that the impact profile on the sample depends strongly on the value of the particle side wall restitution coefficient cw and a heterogeneous distribution of impacts on both the sample and the sonotrode is obtained with decreasing cw. We compute within this model impact parameters such as impact angle, impact velocity, etc. and compare them with our experimental findings.