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Cracking and Damage in a Notched Unidirectional Fiber‐Reinforced Brittle Matrix Composite
Author(s) -
Bordia Rajendra K.,
Daigleish Brian J.,
Charalambides Panos G.,
Evans Anthony G.
Publication year - 1991
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1991.tb06842.x
Subject(s) - materials science , composite material , brittleness , composite number , cracking , acoustic emission , ultimate tensile strength , bridging (networking) , fiber , fracture mechanics , shear (geology) , strain energy release rate , fiber pull out , failure mode and effects analysis , glass fiber , matrix (chemical analysis) , composite laminates , computer network , computer science
Results of four‐point bend tests on notched beams of a laminated unidirectional fiber‐reinforced glass matrix composite are presented. The failure sequence has been established through in situ examination. The dominant damage mode is a mixed‐mode, split crack that runs parallel to the predominant fiber directions. The crack interacts with and crosses over imperfectly aligned fibers. The resulting bridging tractions are sufficient to cause the critical strain energy release rate to increase substantially as the crack extends. Several other damage modes are also observed. These include mode I (tensile) matrix cracks bridged by fibers, mode II (shear) cracks, and compressive damage at the loading points.