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A fracture mechanics analysis of impact damage in a thick composite laminateGraphite/epoxy filament-wound cases (FWC) for the solid rocket motors of the space shuttle are being made by NASA. The FWC cases are wound with AS4W graphite fiber impregnated with an epoxy resin and are about 1.4 inches or more thick. Graphite-epoxy composite laminates, unlike metals, can be damaged easily by low velocity impacts of objects like dropped tools. The residual tension strength of the FWC laminate, after impact, is being studied at Langley Research Center. The conditions that give minimum visual evidence of damage are being emphasized. A fracture mechanics analysis was developed to predict the residual strength, after impact, using radiographs to measure the size of the damage and an equivalent surface crack to represent the damage.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Poe, C. C., Jr.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1985
Publication Information
Publication: Virginia Polytechnical Inst. and State Univ. Proceedings of the 2nd Annual Review of the Center for Composite Materials and Structures
Subject Category
Composite Materials
Accession Number
Distribution Limits
Work of the US Gov. Public Use Permitted.

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