Mechanics & Industry
Volume 18, Number 6, 2017
|Number of page(s)||8|
|Published online||02 February 2018|
On the residual stress modeling of shot-peened AISI 4340 steel: finite element and response surface methods
School of Mechanical Engineering, Iran University of Science and Technology,
2 School of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Iran
* e-mail: email@example.com
Accepted: 12 October 2017
Shot peening is a well-known process in applying the residual stress on the surface of industrial parts. The induced residual stress improves fatigue life. In this study, the effects of shot peening parameters such as shot diameter, shot speed, friction coefficient, and the number of impacts on the applied residual stress will be evaluated. To assess these parameters effect, firstly the shot peening process has been simulated by finite element method. Then, effects of the process parameters on the residual stress have been evaluated by response surface method as a statistical approach. Finally, a strong model is presented to predict the maximum residual stress induced by shot peening process in AISI 4340 steel. Also, the optimum parameters for the maximum residual stress are achieved. The results indicate that effect of shot diameter on the induced residual stress is increased by increasing the shot speed. Also, enhancing the friction coefficient magnitude always cannot lead to increase in the residual stress.
Key words: Shot peening process / residual stress / AISI 4340 steel / response surface methodology / modeling
© AFM, EDP Sciences 2017
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