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Partial interlaminar separation for compositesEpoxy-matrix composites with improved fracture toughnesses, tensile strengths, and impact resistances are fabricated by using perforated film to break part of bond between laminae. Separation diffuses local stress concentrations near cracks, inhibiting their ability to propagate. Tests on modified panels showed fifty percent increase in fracture strengths.
Document ID
19780000052
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Elber, W.
Date Acquired
August 9, 2013
Publication Date
June 1, 1978
Publication Information
Publication: NASA Tech Briefs
Volume: 3
Issue: 1
ISSN: 0145-319X
Subject Category
Materials
Report/Patent Number
LAR-12065
ISSN: 0145-319X
Report Number: LAR-12065
Accession Number
78B10052
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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