Proceedings of the Korean Society of Precision Engineering Conference (한국정밀공학회:학술대회논문집)
- 2000.11a
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- Pages.473-476
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- 2000
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- 2005-8446(pISSN)
Fatigue crack propagation of buried pipe steel under mixed model loading
혼합모드하중을 받는 매석배관강의 피로균열전파 거동
Abstract
Recently, many studies focus on mixed-mode fatigue-fracture characteristics of characteristics of materials. In order to reveal crack initiation and propagation mechanisms in combined -mode fatigue. This paper investigates the initiation and propagation behavior of the fatigue crack of the STS304 specimens under mixed mode loading conditions. moreover crack arrest and branch phenomena were analyzed with respect to the change do the angle of inclined loading. The relationship between the angle of inclined loading and the angle of branched crack was studied. A greate number of cycles are necessary to initiate a new crack from the initial crack. The direction of the new crack propagation is determined by MTS theory.
Keywords
- Fatigue life;
- Maximum Tangential Stress;
- theory;
- $K_1$(mode 1);
- $K_{II}$(mode II);
- Inclined angle;
- branch crack;
- Traveling microscope
- 피로수명;
- 최대 원주응력 이론;
- 응력확대계수;
- mode II응력확대계수;
- 경사각;
- 가지균열;
- 이동 현미경;