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Side effects of shot peening on fatigue crack initiation life

Gangaraj, S. M. H ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. DOI: 10.5829/idosi.ije.2011.24.03a.06
  3. Publisher: 2011
  4. Abstract:
  5. The beneficial effects of shot peening on fatigue life of mechanical components are well known. However, there are some reports in the literature that indicate inappropriate shot peening parameters tend to reduce the fatigue life. It is therefore, the purpose of this study to find a logical quantitative justification for these observations. Using finite element method, a dynamic elasticplastic simulation of shot peening was presented. Effect of shot velocity and size on surface morphology after shot peening were examined. Fatigue crack initiation life calculation of shot peened specimens revealed that beneficial effect of shot peening significantly vanishes in the case of high velocities and bigger shots
  6. Keywords:
  7. Fatigue crack initiation life ; Surface roughness ; Crack initiation ; Cracks ; Fatigue crack propagation ; Fatigue of materials ; Finite element method ; Stress concentration ; Stress corrosion cracking ; Surface roughness ; Beneficial effects ; Elastic-Plastic ; Fatigue crack initiation ; Finite Element ; High velocity ; Mechanical components ; Shot peening parameters ; Side effect ; Shot peening
  8. Source: International Journal of Engineering, Transactions A: Basics ; Volume 24, Issue 3 , 2011 , Pages 275-280 ; 17281431 (ISSN)
  9. URL: http://www.ije.ir/Vol24/No3/A/6.pdf