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Damage tolerance in graphite‐epoxy composite: Comprehensive monitoring method
Author(s) -
Tas M.,
Roy C.
Publication year - 1987
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.750080510
Subject(s) - materials science , epoxy , composite material , composite number , graphite , monotonic function , damage tolerance , acoustic emission , composite laminates , structural engineering , mathematical analysis , mathematics , engineering
A failure model is proposed to calculate the minimum expected lifetime of a graphite‐epoxy structure under cyclic loading conditions. The theoretical approach is based on the statistical theory of strength and the mechanical redistribution of stresses between piles of a damaged laminate. The use of the acoustic emission technique has permitted the development of internal damage to be monitored during cyclic loading of unidirectional laminates. The experimental results indicate that the composite can withstand greater damage at low level cyclic loading than observed during monotonic loading to failure. The theoretical modeling under development aims at predicting this behavior.