Proceedings of the KSME Conference (대한기계학회:학술대회논문집)
- 2000.11a
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- Pages.231-237
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- 2000
The Influence of Cyclic-bending Moment on the Delamination Zone and the Fatigue Crack Propagation in A15052/AFRP Laminates
반복-굽힘 모멘트가 A15052/AFRP 적층재의 층간분리 영역과 피로균열진전에 미치는 영향
- Published : 2000.11.02
Abstract
A15052/AFRP laminates were developed principally to obtain a material with good fatigue strength, in which possible cracks would grow very slowly. Weight savings of more than 30% should be attainable in practice. Also, the crack bridging fibers could still was carry a significant part of the load over the crack, thus the COD and stress intensity factor was reduced at the crack tip. A15052/ AFRP laminates consists of three thin sheets of 5052-H34 aluminum alloy and two layers of [0] unidirectional aramid fiber prepreg. The cyclic-bending moment test was investigated based on applying the five kinds of bending moments. The size of the delamination zone produced between 5052-H34 aluminum alloy sheets and fiber-adhesive layers was measured from ultrasonic C-scan pictures taken around the fatigue crack. In addition, the relationship between the cyclic-bending moment and the delamination zone size was studied and the effect of fiber bridging mechanism was also considered.
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