지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
이용수
초록· 키워드
오류제보하기
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.
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.
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.
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.
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.
목차
Abstract
1. 序論
2. 破壤力學에 의한 海洋構造物의 疲勞設計를 위한 규격의 검토
3. 試驗片 및 實驗方法
4. 彈塑性應力集中部에 있는 初期疲勞龜裂의 △J
5. 初期龜裂傅播에 대한 實驗結果
6. 考察
7. 結論
參考文獻
참고문헌 (0)
참고문헌 신청함께 읽어보면 좋을 논문
논문 유사도에 따라 DBpia 가 추천하는 논문입니다. 함께 보면 좋을 연관 논문을 확인해보세요!
-
A STUDY ON FATIGUE STRENGTH EVALUATION FOR CRUCIFORM FILLET JOINTS USING EFFECTIVE NOTCH STRESS
대한용접학회 특별강연 및 학술발표대회 개요집
2012 .05
-
Crack Propagation Behavior Based on the Characteristic of the Interaction Between Two Fatigue Cracks
KSME International Journal
1998 .04
-
초음파탐상법을 이용한 Double Edge Notch 선단의 균열발생에 관한 연구
한국안전학회지
1993 .01
-
피로크랙 진전과정에서의 크랙열림점 평가에 관한 연구 ( I ) - 실험에 의한 크랙열림점 측정 -( A Study on Evaluation of Crack Opening Point in Fatigue Crack Propagation Course ( I ) - Measurement of Crack Opening Point by Experiment - )
대한기계학회 논문집
1991 .05
-
강구조부재의 피로균열성장에 미치는 제인자에 관한 연구 (1) : 균열닫힘효과가 피로균열성장속도에 미치는 영향
한국강구조학회지
1996 .06
-
Fatigue Indicator Sensor의 형상에 따른 균열진전 특성의 비교 연구
대한조선학회 논문집
2010 .08
-
알루미늄 합금재의 피로크랙 전파거동에 미치는 미소원공결함
Journal of Advanced Marine Engineering and Technology (JAMET)
2008 .09
-
알루미늄 합금재의 미소원공결함이 피로크랙 전파거동에 미치는 영향
한국마린엔지니어링학회 학술대회 논문집
2008 .06
-
선체 용접부의 균열진전 및 피로수명예측에 관한 연구(Ⅱ)
대한조선학회 논문집
2008 .12
-
열화상기술을 이용한 모멘트 변화에 따른 피로균열진전 연구
한국생산제조학회지
2010 .06
-
Finite element procedures for the numerical simulation of fatigue crack propagation under mixed mode loading
Structural engineering and mechanics : An international journal
2010 .01
-
Al 2024-T3재의 Crack Opening Point의 평가에 관한 연구
한국안전학회지
2004 .01
-
고성능 강재의 피로균열전파와 피로수명평가
대한기계학회 춘추학술대회
2010 .11
-
파괴역학 기반 피로 수명 평가를 위한 피로 균열 진전 파라미터에 관한 연구
대한용접·접합학회지
2017 .02
-
순수 티타늄 판재의 피로균열 전파거동에 관한 연구
한국해양공학회지
1995 .06
-
박판합금재료의 피로균열 전파특성에 대한 피로수명예측과 활용
Journal of the Korean Society for Precision Engineering
2007 .02
-
박판 Al 2024-T3 합금재료의 피로균열성장지연거동과 피로수명예측
한국기계기술학회지
2011 .01
-
복수 표면균열의 확률적 특성을 고려한 용접부 피로수명 평가
대한기계학회 논문집 A권
2005 .11
이 논문의 저자 정보
이 논문과 함께 이용한 논문
최근 본 자료
댓글(0)
0
UCI(KEPA) : I410-ECN-0101-2009-559-015501672