Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Finite Element Analysis of Stress and Strain Distribution on Thin Disk Specimen for SCC Initiation Test in High Temperature and Pressure Environment

고온 고압 응력부식균열 개시 시험용 디스크 시편의 응력과 변형에 대한 유한요소 해석

  • Tae-Young Kim (Materials Safety Technology Development Division, Korea Atomic Energy Research Institute) ;
  • Sung-Woo Kim (Materials Safety Technology Development Division, Korea Atomic Energy Research Institute) ;
  • Dong-Jin Kim (Materials Safety Technology Development Division, Korea Atomic Energy Research Institute) ;
  • Sang-Tae Kim (Department of Nuclear Engineering, Hanyang University)
  • 김태영 (한국원자력연구원 재료안전기술개발부) ;
  • 김성우 (한국원자력연구원 재료안전기술개발부) ;
  • 김동진 (한국원자력연구원 재료안전기술개발부) ;
  • 김상태 (한양대학교 원자력공학과)
  • Received : 2022.07.15
  • Accepted : 2022.11.17
  • Published : 2023.03.02
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Abstract

The rupture disk corrosion test (RDCT) method was recently developed to evaluate stress corrosion cracking (SCC) and was found to have great potential for the real-time detection of SCC initiation in a high temperature and pressure environment, simulating the primary water coolant of pressurized water reactors. However, it is difficult to directly measure the stress applied to a disk specimen, which is an essential factor in SCC initiation. In this work, finite element analysis (FEA) was performed using ABAQUSTM to calculate the stress and deformation of a disk specimen. To determine the best mesh design for a thin disk specimen, hexahedron, hex-dominated, and tetrahedron models were used in FEA. All models revealed similar dome-shaped deformation behavior of the disk specimen. However, there was a considerable difference in stress distribution in the disk specimens. In the hex-dominated model, the applied stress was calculated to be the maximum at the dome center, whereas the stress was calculated to be the maximum at the dome edge in the hexahedron and tetrahedron models. From a comparison of the FEA results with deformation behavior and SCC location on the disk specimen after RDCT, the most proper FE model was found to be the tetrahedron model.

Keywords

Acknowledgement

본 연구는 한국연구재단을 통해 과기부 연구개발사업(2021M2E4A1037979, RS-2022-00143718)의 지원을 받아 수행되었다.

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