Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Development of Local Failure Criteria for Well Thinning Defect by Simulated Specimen Tests

모사시편 시험을 통한 감육결함 국부손상기준 개발

  • 김진원 (조선대학교 원자력공학과) ;
  • 김도형 (조선대학교 원자력공학과) ;
  • 박치용 (한전 전력연구원 원전기계재료그룹) ;
  • 이성호 (한전 전력연구원 원전기계재료그룹)
  • Published : 2007.03.01
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Abstract

The objective of this study is to develop a local failure criterion for a wall thinning defect of piping components. For this purpose, a series of tensile tests was performed using several types of simulated specimens with different stress states, including smooth round bar, notched round bar (five different notch radii), and grooved plate (three different groove radii). In addition, finite element (FE) simulations were performed on the simulated specimen tests and the results were compared with the test results. From the comparisons, the equivalent stress and strain corresponding to maximum load and final failure of notched specimens were proposed as failure criteria under tensile load. The criteria were verified by employing them to the estimation of failure of grooved plate specimens that simulate the wall thinning defect. It showed that the proposed criteria accurately estimate the maximum load and final failure of grooved plate specimen tests.

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References

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