Korean Journal of Computational Design and Engineering (한국CDE학회논문집)

Society for Computational Design and Engineering (한국CDE학회)
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Simulation of Surface Coverage Made by Impeller Type Shot-peening Machines

임펠러식 쇼트피닝 머신에 의한 표면 커버리지 시뮬레이션

  • Shin, Ki-Hoon (Department of Mechanical and Automotive Engineering, Seoul National University of Science and Technology)
  • 신기훈 (서울과학기술대학교 기계.자동차공학과)
  • Received : 2013.11.11
  • Accepted : 2013.12.09
  • Published : 2014.03.01
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Abstract

Shot-peening is frequently used on various mechanical parts because it can improve the fatigue life of components by generating compressive residual stresses on the surface. This can be done by repeatedly hitting the work-piece surface with small balls and making indentations on it. In fact, finding optimal peening time among various peening parameters is the most important. Under-peening can not improve the fatigue life sufficiently while over-peening causes cracks and reduces fatigue life in contrast. In general, optimal peening time is experimentally determined by measuring arc-height using Almen-strip in accordance with SAE J442 standard. To save the time and efforts spent in carrying out experiments to find optimal peening time, this paper presents a computer simulation algorithm for the estimation of surface coverage made by impeller type shot-peening machines (PMI-0608). Surface coverage is defined as the proportion of the work-piece surface that has been indented in a given time of shot-peening. An example (standard tensile test specimen) is presented to validate the proposed method.

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References

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