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논문 기본 정보

자료유형
학술저널
저자정보
안규백 (포스코) 배홍열 (포스코) 노병두 (포스코) 안영호 (포스코) 최종교 (포스코) 우완측 (한국원자력연구원) 박정웅 (조선대학교)
저널정보
대한용접·접합학회 대한용접·접합학회지 大韓熔接·接合學會誌 第33卷 第1號
발행연도
2015.2
수록면
35 - 40 (6page)

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Recently, there have been the increase of ship size and the development of oil and gas in arctic region. These trends have led to the requirements such as high strength, good toughness at low temperature and good weldability for prevent of brittle fracture at service temperature. There has been the key issue of crack arrestability in large size structure such as container ship. In this report for the first time, crack arrest toughness of thick steel plate welds was evaluated by large scale ESSO test for estimate of brittle crack arrestability in thick steel plate. For large structures using thick steel plates, fracture toughness of welded joint is an important factor to obtain structural integrity. In general, there are two kinds of design concepts based on fracture toughness: crack initiation and crack arrest. So far, when steel structures such as buildings, bridges and ships were manufactured using thick steel plates (max. 80~100mm in thickness), they had to be designed in order to avoid crack initiation, especially in welded joint. However, crack arrest design has been considered as a second line of defense and applied to limited industries like pipelines and nuclear power plants. Although welded joint is the weakest part to brittle fracture, there are few results to investigate crack arrest toughness of welded joint. In this study, brittle crack arrest designs were developed for hatch side coaming of large container ships using arrest weld, hole, and insert technology.

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Abstract
1. 서론
2. 적용강재 및 실험방법
3. 시험결과 및 고찰
4. 결론
References

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