鋼板桁 덮개판 형상에 따른 피로균열성장특성

• 영문명: Fatigue crack growth characteristics by the cover plate shapes in the steel plate girder
• 발행기관: 강원대학교 산업기술연구소
• 저자명: 정영화(Jung Young Hwa) 김익겸(Kim lk Gyeom) 정진석(Jung Jin Suck) 이형근(Lee Hyung Koon)
• 간행물 정보: 『산업기술연구』vol.19, 1~10쪽, 전체 10쪽
• 주제분류: 공학 > 공학일반
• 파일형태: PDF
• 발행일자: 1999.09.30

영문 초록

When a variety of repeated loads are given, most steel structures failed in much lower level of loads than static failure loads. In addition, bridge always includes the internal defects or discontinuities. from these, fatigue cracks initiates and can lead to sudden failure. Thus, in this study, tensile specimens by the cover plate shapes were used as the test specimens. The fatigue test was performed by constant amplitude fatigue loading and beach mark. From the results of this study, each specimen’s fatigue section was observed. in addition, stress intensity factor at crack tip was calculated by using the Green’s function which applied to discontinuous section where causing stress concentration. Therefore, the fatigue life of structural detail was investigated by adopting the theories of fracture mechanics. each specimen’s crack shape is a semi-elliptical surface crack or center crack sheet, stress gradient correction factor, Fg is the most subjective of all stress intensity correction factors and fatigue life should be predicted by previous proposed function and finite element analysis.

목차

Abstract

1. 서론

2. 응력확대계수범위

3. 실험

4. 피로균열성장특성

5. 결론

참고문헌

키워드

피로균열 피로수명 응력구배계수 응력확대계수K fatigue crack fatigue life Stress gradient correction factor Stress intensity factor