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Delamination behavior of quasi-isotropic graphite epoxy laminates subjected to tension and torsion loadsSixteen and thirty-two ply quasi-isotropic laminates fabricated from AS4/3501-6 were subjected to pure tension, simultaneous tension and torsion, and torsion fatigue. Layups tested were (45 sub n/-45 sub n/O sub n/90 sub n) sub s, with n = 2 or 4. A torsion damage pattern consisting of a localized matrix crack and delaminations was characterized, and the measured torsional stiffnesses were compared with calculated values. It was found that a combination of tension and torsion led to failure at smaller loads than either type of deformation acting alone. Further work is required to determine the exact form of the failure criterion.
Document ID
19920013381
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hinkley, J. A. (NASA Langley Research Center Hampton, VA, United States)
Obrien, T. K. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1992
Subject Category
Nonmetallic Materials
Report/Patent Number
AVSCOM-TR-91-B-018
NAS 1.15:104181
NASA-TM-104181
Meeting Information
Meeting: American Helicopter Society Specialists'' Meeting
Location: Williamsburg, VA
Country: United States
Start Date: January 1, 1991
Accession Number
92N22624
Funding Number(s)
PROJECT: RTOP 505-63-50
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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