Dynamic finite element analysis of shot peening process of 2618-T61 aluminium alloy

Shot peening is a surface treatment processes usually used for the improvement of fatigue strength of metallic parts by inducing residual stress field in them. The experimental evaluation of shot peening parameters is not only very complex but also costly. An attractive alternative is the explicit d...

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Bibliographic Details
Published inScientia Iranica. Transaction B, Mechanical engineering Vol. 26; no. 3; pp. 1378 - 1387
Main Authors Ullah, H, Ullah, B, Rauf, A, Muhammad, R
Format Journal Article
LanguageEnglish
Published Tehran Sharif University of Technology 01.06.2019
Subjects
Alloys
Aluminum base alloys
CAD
Compressive properties
Computer aided design
Computer simulation
Constitutive models
Crack initiation
Fatigue strength
Finite element analysis
Finite element method
Mathematical models
Metal fatigue
Metal plates
Numerical analysis
Plastic deformation
Process parameters
Residual stress
Shot peening
Simulation
Strain rate
Stress distribution
Surface treatment
Velocity
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Summary:Shot peening is a surface treatment processes usually used for the improvement of fatigue strength of metallic parts by inducing residual stress field in them. The experimental evaluation of shot peening parameters is not only very complex but also costly. An attractive alternative is the explicit dynamics Finite Element (FE) analysis having the capability of accurately envisaging the shot peening process parameters using a suitable constitutive model and numerical technique for the material. In this study, ANSYS/LS-DYNA software was used to simulate the impact of steel shots of various sizes on 2618-T61 aluminium alloy plate described with strain rate dependent elasto-plastic material model. The impacts were determined at various incident velocities. The effects of shot velocity and size on the induced compressive residual stress and plastic deformation were investigated. The results demonstrated that increasing the shot velocity and size would lead to increase in plastic deformation of the target. The obtained results were close to the published ones, and the numerical models were capable to capture the patterns of residual stress and plastic deformation experimentally observed in aluminium alloys. The study is quite helpful in determining and selecting optimal shot peening parameters for the surface treatment of aluminium alloy parts.
DOI:10.24200/sci.2018.5483.1302