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Finite Element Based Multi-Scale Ductile Failure Simulation of Full-Scale Pipes with a Circumferential Crack in a Low Carbon Steel

유한요소기반 다중스케일 연성파손모사 기법을 이용한 원주방향 균열이 존재하는 탄소강 실배관의 파손예측 및 검증

  • 한재준 (고려대학교 기계공학과) ;
  • 배경동 (고려대학교 기계공학과) ;
  • 김윤재 (고려대학교 기계공학과) ;
  • 김종현 (한국전력기술 전력기술연구소) ;
  • 김낙현 (한국원자력연구원 고속로설계부)
  • Received : 2014.02.22
  • Accepted : 2014.05.28
  • Published : 2014.07.01

Abstract

This paper describes multi-scale based ductile fracture simulation using finite element (FE) damage analysis. The maximum and crack initiation loads of cracked components were predicted using proposed virtual testing method. To apply the local approach criteria for ductile fracture, stress-modified fracture strain model was adopted as the damage criteria with modified calibration technique that only requires tensile and fracture toughness test data. Element-size-dependent critical damage model is also introduced to apply the proposed ductile fracture simulation to large-scale components. The results of the simulation were compared with those of the tests on SA333 Gr. 6 full-scale pipes at $288^{\circ}C$, performed by the Battelle Memorial Institute.

Keywords

Ductile Fracture;Full-scale Pipes;Virtual Testing Method;Finite Element Analysis;Damage Simulation;Element-size-dependent Critical Damage Model

Acknowledgement

Supported by : 한국연구재단

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