Open AccessDependance of stress ratio on the Mode I fatigue delamination growth in woven carbon–epoxy composites
Author(s) -
Torres Mauricio,
GarcíaRivera S. Sugey,
RivasLópez Diego,
GonzálezVelázquez Jorge L.
Publication year - 2018
Publication title -
advances in polymer technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.523
H-Index - 44
eISSN - 1098-2329
pISSN - 0730-6679
DOI - 10.1002/adv.22168
Subject(s) - materials science , composite material , epoxy , delamination (geology) , paris' law , fracture toughness , tension (geology) , composite number , stress (linguistics) , plain weave , striation , carbon fibers , fracture mechanics , crack closure , ultimate tensile strength , paleontology , linguistics , philosophy , biology , subduction , tectonics , yarn
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 ). 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.