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자료유형
학술저널
저자정보
저널정보
대한기계학회 대한기계학회 논문집 A권 대한기계학회논문집 A권 제27권 제3호
발행연도
2003.3
수록면
440 - 449 (10page)

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초록· 키워드

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Residual strength of fiber metal laminates after impact was studied. 3/4 lay up FML was fabricated using 4 ply prepreg, 2 ply aluminum sheets, and I ply steel sheet. Quasi isotropic ([0/45/90/-45]s) and orthotropic ([0/90/0/90]s) FRP were also fabricated to compare with FML Impact test were conducted by using instrumented drop weight impact machine (Dynatup, Model 8250). Penetration load and absorbed energy of FML were superior to those of FRPs. Tensile tesls were conducted to evaluate the residual strength after
impact. Strength degradation of FML was less than that of FRP. This means that the damage tolerance of FML is excellent than that of FRP'. Residual strength of each specimen was predicted by using Whitney and Nuismer(WN) Model. Impact damage area is assumed as a circular notch in WN model. Damage width is defined as the average of back face and top face damage width of each specimen. Average stress and point stress criterions were used to calculate the characteristic length. It is supposing that a characteristic length is a constant. The distribution of characteristic length shows that the assumption is reasonable. Prediction was well matched with experiment under both stress criter ions.

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Abstract

1.서론

2.잔류강도 예측모델

3.실험

4.결과 및 고찰

5.결론

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