Abstract
AbstractThis study analyzes crack growth behavior of woven carbon fiber reinforced plastics under tension–tension fatigue varying the stress ratio (R). The composite studied here is 3K‐70‐P carbon fiber plain weave with EPOLAM 2015® epoxy resin, manufactured by vacuum bagging procedure. The modified París’ law for composites is used to estimate the delamination crack growth (da/dN) in terms of interlaminar fracture toughness ratio (Gmax/GIC). Delamination's dependence on R factor is discussed, as crack growth rate increases when stress ratio becomes higher. Also, fractographic examination is provided, as fatigue striation density is inversely dependent on fatigue stress ratio.
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