Dependance of stress ratio on the Mode I fatigue delamination growth in woven carbon–epoxy composites

This 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 ( G max / G IC...