http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 堀川浩甫(Kohsuke Horikawa) (검색결과 1 건)
- 무료
- 기관 내 무료
- 유료
-
趙相明(Sang-Myung Cho),堀川浩甫(Kohsuke Horikawa) 한국해양공학회 1988 韓國海洋工學會誌 Vol.2 No.2
In order to consider the concept of the 'fitness for purpose' in fatigue design of offshore structure, fracture mechanics is applied to evaluate initial or weld defects.<br/> Generally, linear elastic fracture mechanics has been applied to estimate initial fatigue crack propagation rate as well as long fatigue crack propagation rate. But, initial fatigue crack propagation rate in elasto-plastic notch field may not be characterized by application of stress intensity factor range △K, because plastic effect due to stress concentration of notch may contribute to initial crack propagation. Therefore, to introduce the plastic effect into fatigue crack driving force, in this studty, the evaluating method of J -integral range △J, was developed for initial fatigue cracks in elasto-plastic notch field. The interpolation function for J -integral by Willson was modified for application to notch field. In calculation of △J obtained from the modified J -integral, stress gradient and crack closure behavior in the notch field were considered.<br/> The initial crack propagation rates in the notch fields of mild steels and high tensile strength steels were correlated to △J. As the result, it was cleared that the present △J is applicable to characterize the fatigue crack propagation rates in both the elastic and elasto-plastic notch fields.
DBpia연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
