한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제31권6호
  • /
  • Pages.551-557
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  • 2014
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  • 1225-9071(pISSN)
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  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
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등가응력구배시편의 파괴특성에 관한 연구

A Study on the Fracture Toughness Characteristics of Equivalent Stress Gradient Specimen

  • Park, Keon Tae (Graduate School of mechanical engineering, Sungkyunkwan University) ;
  • Shin, In Hwan (Graduate School of mechanical engineering, Sungkyunkwan University) ;
  • Kim, Ik Hyun (Graduate School of mechanical engineering, Sungkyunkwan University) ;
  • Kim, Yong Seok (Graduate School of mechanical engineering, Sungkyunkwan University) ;
  • Kwon, Hyuck Sam (Graduate School of mechanical engineering, Sungkyunkwan University) ;
  • Koo, Jea Mean (Department of mechanical engineering, Sungkyunkwan University) ;
  • Seok, Chang Sung (Department of mechanical engineering, Sungkyunkwan University)
  • 투고 : 2013.12.18
  • 심사 : 2014.05.12
  • 발행 : 2014.06.01
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초록

Ideally, it is preferable to obtain the fracture characteristics of a piping from the fracture toughness of real pipes. However, a fracture toughness test on real pipes not only incurs much expense, but is very difficult to perform. Therefore fracture toughness tests have been carried out with standard specimens instead of real pipes. But, the estimates of fracture toughness obtained from standard specimens are more conservative than those of real pipes owing to the difference in the constraint effect between real pipes and standard specimens. Therefore, we have been studied with equivalent stress gradient specimen (ESG) which is designed to behave equally compared to real pipe about stress gradient on crack tip. In this study, we will evaluate fracture characteristics of equivalent stress gradient specimen by using analytical methods and compare with those of real pipe. And finally investigate suitability of equivalent stress gradient specimen.

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참고문헌

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