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Tensile and compressive failure modes of laminated composites loaded by fatigue with different mean stressLaminated composite materials tend to fail differently under tensile or compressive load. Under tension, the material accumulates cracks and fiber fractures, while under compression, the material delaminates and buckles. Tensile-compressive fatigue may cause either of these failure modes depending on the specific damage occurring in the laminate. This damage depends on the stress ratio of the fatigue loading. Analysis of the fatigue behavior of the composite laminate under tension-tension, compression-compression, and tension-compression had led to the development of a fatigue envelope presentation of the failure behavior. This envelope indicates the specific failure mode for any stress ratio and number of loading cycles. The construction of the fatigue envelope is based on the applied stress-cycles to failure (S-N) curves of both tensile-tensile and compressive-compressive fatigue. Test results are presented to verify the theoretical analysis.
Document ID
19910038088
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Rotem, Assa
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1990
Publication Information
Publication: Journal of Composites Technology and Research
Volume: 12
ISSN: 0885-6804
Subject Category
Composite Materials
Accession Number
91A22711
Distribution Limits
Public
Copyright
Other

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