대한조선학회논문집 (Journal of the Society of Naval Architects of Korea)

  • 제48권3호
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  • Pages.200-206
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  • 2011
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  • 1225-1143(pISSN)
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  • 2287-7355(eISSN)
대한조선학회 (The Society of Naval Architects of Korea)
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선박 및 해양구조물용 극저온 재료의 온도 및 변형률 속도 의존 통합 구성방정식 개발

Development of Temperature and Strain-Rate Dependent Unified Constitutive Equation for Ships and Offshore Structures

  • 박웅섭 (부산대학교 조선해양공학과) ;
  • 김정현 (부산대학교 조선해양공학과) ;
  • 전민성 (삼성중공업 조선해양연구소(주)) ;
  • 이제명 (부산대학교 조선해양공학과)
  • Park, Woong-Sup (Department of Naval Architecture and Ocean Engineering, Pusan Naval University) ;
  • Kim, Jeong-Hyeon (Department of Naval Architecture and Ocean Engineering, Pusan Naval University) ;
  • Chun, Min-Sung (Marine Research Institute, Samsung Heavy Industries Co., Ltd.) ;
  • Lee, Jae-Myung (Department of Naval Architecture and Ocean Engineering, Pusan Naval University)
  • 투고 : 2010.12.01
  • 심사 : 2011.02.24
  • 발행 : 2011.06.20
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초록

The mechanical properties of the most widely used cryogenic materials, i.e. austenitic stainless steel (ASS), aluminum alloy and invar steel, strongly depend on temperatures and strain rates. These phenomena show very complicated non-linear behaviors and cannot be expressed by general constitutive equation. In this study, an unified constitutive equation was proposed to represent the effect of temperature and strain rate on the materials. The proposed constitutive equation has been based on Tomita/Iwamoto and Bodner/Partom model for the expression of 2nd hardening due to martensite phase transformation of ASS. To simulate ductile fracture, modified Bodner/Chan damage model was additionally applied to the model and the model validity was verified by comparison of experimental and simulation results.

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과제정보

연구 과제 주관 기관 : 한국연구재단

참고문헌

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