High-cycle fatigue characteristics of quasi-isotropic CFRP laminates over 108 cycles (Initiation and propagation of delamination considering interaction with transverse cracks)
✍ Scribed by Atsushi Hosoi; Narumichi Sato; Yasuyuki Kusumoto; Keita Fujiwara; Hiroyuki Kawada
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 722 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0142-1123
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✦ Synopsis
High-cycle fatigue features of over 10 8 cycles, particularly the initiation and propagation of edge delamination considering the effects of transverse cracks, were investigated using quasi-isotropic carbon-fiberreinforced plastic (CFRP) laminates with a stacking sequence of [45/0/À45/90] s in this study. In the relationship between a transverse crack density and initiation and growth of edge delamination, it was found that fatigue damage growth behavior varied depending on applied stress. It was observed that edge delamination initiated and grew at parts where transverse cracks were dense at ordinary applied stress, whereas it was observed that edge delamination grew before or simultaneously with transverse crack propagation at a low applied stress and high-cycle loading. In addition, the critical transverse crack density where delamination begins growing was calculated to evaluate the interaction between transverse crack and edge delamination growth.