Micromechanical Failure of Transverse-Plies Laminated Fibrous Composites-Fracture/Manufacture Relation
Abstract
Existing micromechanical theories and experimental studies are not able to explain why mechanically identical laminates fail under different loading stresses. A transverse crack in transverse plies is the source of more severs failure modes of the laminate. Starting from an interfacial crack between a fiber and its surrounding matrix somewhere inside the laminate, the crack extends normal to loading direction, kink into the matrix, connects to neighboring kinked cracks, and forms a crack through the whole thickness of the lamina forming a transverse crack. Cracks in the transverse plies appear more repeatedly in the middle plies of [02/902]s more than [0/90]2s. Explanation of this dictates a synergy between micromechanics and composite manufacturing process concepts.
Degree
Ph.D.
Advisors
Sun, Purdue University.
Subject Area
Mechanics|Polymer chemistry|Aerospace engineering
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