Discrete elements method simulation of the movement of media and the velocity between the media and treated parts during the vibratory peening process

Author:  L. De La Torre a, H. Y. Miao a, B. Changeux b, J. Badreddine b, S. Turenne a, M. Lévesque a a. Département de Génie Mécanique, École Polytechnique de Montréal, C.P. 6079, Succ. Centre-Ville, Montréal, Québec, H3C 3A7 Canada b. Safran Tech, Materials & Pro
Source:  ICSP14 Milan
Doc ID:  2022097
Year of Publication:  2022
Abstract:  
Abstract Vibratory peening combines the shot peening and vibratory finishing processes into one process. It has the same effect as shot peening that increases fatigue life by inducing compressive residual stresses while polishing the treated part, which is usually done by vibratory finishing. In this work, the vibratory peening process was investigated to assess if a correlation can be made with the shot peening process using Almen strips. A vibratory peening machine was equipped with a data acquisition system that can measure the displacement of the whole machine in a three-dimension space. Then, Almen strips were treated using 3 mm steel bearing balls while the data acquisition system recorded the vibrations modes of the tub from 10 Hz to 30 Hz. The vibratory peening process was simulated using a model based on the discrete element method (DEM) and its main output was the impact velocity of the media on the Almen strip. Simulations were compared to the vibratory peening treatments on Almen strips and to the literature on conventional shot peening. Keywords: Vibratory peening, DEM simulation, impact velocity