On the potential applications of a 3D random finite element model for the simulation of shot peening

Shot peening is a cold-working process that is used mainly to improve the fatigue life of metallic components. Experimental investigation of the mechanisms involved in shot peening is very expensive and complicated. Therefore, the Finite Element (FE) method has been recognized as an effective mean for characterizing the shot peening process and several types of FE models have been developed to evaluate the effects of shot peening parameters. However, in most of the existing FE models, the shot peening sequence and impact location were defined a priori. It is therefore the purpose of this study to consider the random property of the shot peening process. A novel 3D FE model with multiple randomly distributed shots was developed combining a Matlab program with the ANSYS preprocessor. The explicit solver LS-DYNA has been used to simulate the dynamic impingement process. Several potential applications of this novel model such as: the quantitative relationship of the peening intensity, coverage and roughness with respect to the number of shots have been presented. Moreover, simulations with multiple oblique impacts have been carried out in order to compare with results from normal impingements. Our work shows that such a computing strategy can help understanding and predicting the shot peening results better than conventional FE simulations.

[1]  C. A. Rodopoulos,et al.  Optimisation of the fatigue resistance of 2024-T351 aluminium alloys by controlled shot peening-methodology, results and analysis , 2004 .

[2]  T. Dolan,et al.  Residual Stresses And Fatigue In Metals , 1963 .

[3]  A. Alavi Nia,et al.  A three-dimensional simulation of shot peening process using multiple shot impacts , 2005 .

[4]  Shaker A. Meguid,et al.  Finite element modelling of shot-peening residual stresses , 1999 .

[5]  K. Osakada,et al.  Finite element analysis of peening process with plasticity deforming shot , 1994 .

[6]  Michele Meo,et al.  Finite element analysis of residual stress induced by shot peening process , 2003 .

[7]  J. Y. Ooi,et al.  A numerical study of the residual stress pattern from single shot impacting on a metallic component , 2008, Adv. Eng. Softw..

[8]  L. S. Ong,et al.  Relaxation of peening residual stresses due to cyclic thermo-mechanical overload , 2005 .

[9]  Emmanuelle Rouhaud,et al.  3D Finite Element Models of Shot Peening Processes , 2000 .

[10]  Theoretical Basis of Shot Peening Coverage Control , 2004 .

[11]  V. Schulze,et al.  Evaluation of the Influence of Shot Peening Parameters on Residual Stress Profiles Using Finite Element Simulation , 2003 .

[12]  S. Baragetti.  Three-dimensional finite-element procedures for shot peeening residual stress filed prediction , 2001 .

[13]  M. Desvignes,et al.  Analyse des surfaces grenaillées: fissuration, rugosité et contraintes résiduelles , 1987 .

[14]  Yukitaka Murakami,et al.  Mechanism of creation of compressive residual stress by shot peening , 1998 .

[15]  Lars-Erik Lindgren,et al.  Shot peening simulated by two different finite element formulations , 1995 .

[16]  A. Levers,et al.  A Theoretical and Experimental Investigation into the Development of Coverage in Shot Peening , 2006 .

[17]  J. Chaboche,et al.  FINITE ELEMENTS MODEL OF SHOT PEENING , EFFECTS OF CONSTITUTIVE LAWS OF THE MATERIAL , 2007 .

[18]  K. Schiffner,et al.  Simulation of residual stresses by shot peening , 1999 .

[19]  van der Erik Giessen,et al.  SIMULATION OF MATERIALS PROCESSING: THEORY, METHODS AND APPLICATIONS , 1998 .

[20]  Shaker A. Meguid,et al.  Three—dimensional dynamic finite element analysis of shot-peening induced residual stresses , 1999 .

[21]  Y. F. Al-Obaid,et al.  Three-dimensional dynamic finite element analysis for shot-peening mechanics , 1990 .

[22]  P. K. Sharp,et al.  THE FATIGUE RESISTANCE OF PEENED 7050‐T7451 ALUMINIUM ALLOY—REPAIR AND RE‐TREATMENT OF A COMPONENT SURFACE , 1994 .

[23]  Emmanuelle Rouhaud,et al.  Influence of Shots' Material on Shot Peening, a Finite Element Model , 2002 .

[24]  Y. F. Al-Obaid,et al.  Shot peening mechanics: experimental and theoretical analysis , 1995 .

[25]  Mario Guagliano,et al.  Relating Almen intensity to residual stresses induced by shot peening: a numerical approach , 2001 .

[26]  Shaker A. Meguid,et al.  3D FE analysis of peening of strain-rate sensitive materials using multiple impingement model , 2002 .

[27]  G. A. Webster,et al.  Residual stress distributions and their influence on fatigue lifetimes , 2001 .