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A Optimal 3D FE Model for Evaluation of Peening Residual Stress Under Angled Multi-impacts

다중경사충돌시 피닝잔류응력 평가를 위한 최적의 3차원 유한요소모델

  • Hyun, Hong-Chul (Dept. of Mechanical Engineering, Sogang Univ.) ;
  • Kim, Tae-Hyung (Gas Turbine Technology Service Center, KEPCO Plant Service & Engineering Co.) ;
  • Lee, Hyung-Yil (Dept. of Mechanical Engineering, Sogang Univ.)
  • 현홍철 (서강대학교 기계공학과) ;
  • 김태형 (한전 KPS(주) GT 정비기술센터) ;
  • 이형일 (서강대학교 기계공학과)
  • Received : 2010.10.26
  • Accepted : 2011.12.13
  • Published : 2012.02.01

Abstract

The FE model for shot peening often assume that shots impact vertically on the engineering parts to generate compressive residual stresses. However, the shots obliquely impact on the surface in actual peening. In this work, we propose a 3D finite element (FE) model for evaluation of residual stress under angled shot peening. Using the FE model for angled multi-impact, we examine the effects of factors such as impact angle, impact pattern and the number of shots. Plastic deformation of shot is also considered. To validate the model, we then compare the FE solution with experimental result by X-ray diffraction (XRD). The proposed model will be a base of 3D multi-impact FE model with diverse impact angles.

Keywords

Angled impact;Peening residual stress;Finite element model;Multi-shots

Acknowledgement

Supported by : 한국학술진흥재단

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