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http://dx.doi.org/10.3795/KSME-A.2010.34.6.717

Evaluation of Fatigue Crack Propagation Depending on Fiber Array Direction in Woven CFRP Composites  

Geum, Jin-Hwa (Dept. of Mechanical Engineering, Sungkyunkwan Univ.)
Choi, Jung-Hun (Dept. of Mechanical Engineering, Sungkyunkwan Univ.)
Park, Hong-Sun (Dept. of Mechanical Engineering, Sungkyunkwan Univ.)
Koo, Jae-Mean (Dept. of Mechanical Engineering, Sungkyunkwan Univ.)
Seok, Chang-Sung (Dept. of Mechanical Engineering, Sungkyunkwan Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.34, no.6, 2010 , pp. 717-723 More about this Journal
Abstract
Many researchers have studied woven fabric carbon-fiber-reinforced composite (CFRP) materials but the study of fatigue crack propagation in composites has been insufficient. It has known that the crack propagation behavior differs depending on the load and the fiber direction. In this study, the fatigue crack propagation along two different fiber array directions ($0^{\circ}$, $45^{\circ}$) in plain woven CFRP composite was investigated. Fatigue crack propagation tests were conducted on the woven CFRP composite under a sinusoidal waveform load with stress ratios of 0.1 at a frequency of 10 Hz. Once the results of the tests were obtained, fatigue crack propagation rates (da/dN) were plotted against the energy release rate amplitude (${\Delta}G$), and it was observed that either mode I crack propagation or mixed mode crack propagation occurs depending on the fiber array direction.
Keywords
Plane Weave CFRP; Fatigue Crack Propagation; Crack Length; Fiber Array Direction; Energy Release Rate;
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