Study on Residual Stresses Redistribution in Welded Joint in Shot peening process

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tudy on Residual Stresses Redistribution in Welded Joint in Shot peening process R. Moharrami R. Sourki p. Azadian Mechanical Engineering, University of Zanjan, Zanjan, Iran Mechanical Engineering, University of Zanjan, Zanjan, Iran Mechanical Engineering, University of Zanjan, Zanjan, Iran Abstract Investigations illustrate that fatigue behavior, corrosion resistance and failure behavior are one of the most common results affected by residual stresses. The shot peening process which causes compressive residual stress (CRS), is one of the ways to improve the performance of industrial components, especially weld joints with tensile residual stress. In the present paper, numerical analysis of parameters of shot peening process on residual stress distribution is employed on pre-stressed specimen. On one hand, the numerical simulation of this process is investigated. On the other hand, the surface CRS and the effective parameters of this process, by simulating it on the welded specimen, are investigated on and around the welding region. In each section, numerical results were verified not only with former numerical investigations but also with building a proper empirical specimen and measuring the stresses experimentally. Results illustrate the decrease of tensile residual stress or increase of CRS on the surface of the pre-stressed specimen after shot peening process. Moreover, it shows that parameters of the shot peening process have a significant impact on final stresses in the specimen. Besides, based on the results the maximum CRS goes up by increasing the diameter and velocity of the shot. Keywords: Residual stress, Redistribution, Simulation, Shot peening, weld joint. OA8 -N$ T< 1 230! :_ "3.% A $ RF ', 2&3"% 8% -))9 " [E 13 R M N$ Q> " K1F 03 &, 3C T< $$ ' 2', 23"%.% b! KF, ]: 0 F a.18 QV13 9@% $$ Q " % 23 * " B% 2$* 9@% 23 0!.' ))9 Q> 23 I3 23? " 9@% 2$* 1 0! ' 1>% * C -8@A & B% G> 2 -c d " * Q.' 9@% $$ > "% #>X 1J 0<* 23? % " Y '! RZ 3 O% " " 2 +:, 2+ ))9 < "% G ))9 AN; -;E " ( ' W - % 1:; -))9.' * 3 $ ' 2" -( "! 3 "% " "% 28 2 ' * +( ) #(.' " 7 -C/( Q 1; Y '!! 9@% $$ #3 * Q " K1F. + " ' & $$ [ ",( 2+ " ' 230 9@% 1 2', 2\ " 8% ]^ :;.' $ ' * r_moharami@znu.ac.ir :

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, Finite Element Simulation of Shot Peening A Method to Evaluate the Influence of Peening Parameters on Surface Characteristics, Proceedings from International Conference of shot peening (ICSP-8), pp.

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A Numerical Study Comparing The Effect on Residual Stresses of Two Different Types of Projectiles During Shot Peening

Copyright 2016 Tech Science Press CMC, vol.51, no.3, pp.203-215, 2016 A Numerical Study Comparing The Effect on Residual Stresses of Two Different Types of Projectiles During Shot Peening J. Solórzano-López