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ON THE EQUIVALENCE OF STRESS INTENSITY AND ENERGY APPROACHES IN BRIDGING ANALYSIS
Author(s) -
Jain L. K.,
Mai Y.W.
Publication year - 1994
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.1994.tb00234.x
Subject(s) - bridging (networking) , materials science , stress intensity factor , composite material , delamination (geology) , reinforcement , toughness , traction (geology) , structural engineering , crack closure , strain energy release rate , fiber pull out , fracture toughness , equivalence (formal languages) , fracture mechanics , composite number , composite laminates , engineering , computer science , mathematics , mechanical engineering , computer network , paleontology , biology , subduction , tectonics , discrete mathematics
— Through‐thickness reinforcement is effective in suppressing delamination in composite laminates. It provides bridging in the crack wake during delamination crack growth. The closure traction behind the crack tip due to this bridging increases the delamination toughness significantly. The effect of bridging may be analysed using the stress intensity approach or the Griffith energetic approach. In this paper, delamination crack growth resistance K R ,(Δa) of a double‐cantilever‐beam specimen, with through‐thickness reinforcement, under Mode I delamination is determined using these two approaches. Additionally, the J‐integral analysis is also employed. A comparison between the theoretical results predicted by these three methods is provided using the example of stitched CFRP.