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Delamination shape effects in aramid‐epoxy‐aluminum (ARALL) laminates with fatigue cracks
Author(s) -
Macheret J.,
Teply J. L.,
Winter E. F. M.
Publication year - 1989
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.750100508
Subject(s) - aramid , materials science , epoxy , composite material , delamination (geology) , ultimate tensile strength , aluminium , residual stress , stress (linguistics) , stress concentration , fracture mechanics , fiber , subduction , tectonics , paleontology , linguistics , philosophy , biology
An aramid reinforced aluminum‐epoxy‐laminate, ARALL, which contains a fatigue crack and a delamination zone is analyzed. It is assumed that the interlaminar shear forces between the aluminum and aramid/epoxy layers are transmitted along the delamination boundary. The aramid/epoxy layer of the laminate is considered a series of linear springs. The tensile stress in the aramid/epoxy layer and the stress intensity factor in the aluminum layer are found for various experimentally observed delamination shapes. A residual strength criterion based on the maximum tensile stress in the aramid/epoxy layer is applied and the analytical results are correlated with the available experimental data.