대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)
- 제21권11호
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- Pages.1965-1971
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- 1997
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- 1226-4873(pISSN)
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- 2288-5226(eISSN)
DOI QR Code
평직복합재의 노치강도 및 피로특성에 미치는 보조원공의 영향
Effects of defence holes on notched strength and fatigue properties in plain woven composite
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Kim, Jung-Kyu
(Dept. of Mechanical Engineering, Hanyang University) ;
- Shim, Dong-Suk (Dept. of Mechanical Design, Graduate School of Hanyang University) ;
- Han, Min-Gyu (Mando Mach. Corp.)
- 발행 : 1997.11.01
초록
The relaxation of stress concentration in notched members can be very significant in the improvement of notched strength and fatigue life. This paper investigated the relationship of stress concentration factor, and notched strength and fatigue life. The stress concentration factors were analyzed by FEM. Uniaxial tensile and fatigue tests were carried on plain woven composite specimens which have a main hole and two defence holes. From experimental results, the notched strength and the fatigue limit increased up to about 50% and 30% respectively due to the reduction in stress concentration. The fatigue lives predicted by Juvinall's approach were underestimated than test results and this trends were remarkable as nothed strength increased. This is because of the underestimation of a coefficient. A in S-N curve (.sigma.
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