THE USE OF WIRE STRAIN GAGES TO DETECT SOME TYPES OF SPLITTING FAILURE IN NOTCHED COMPOSITES | ||||
International Conference on Aerospace Sciences and Aviation Technology | ||||
Article 19, Volume 5, ASAT CONFERENCE 4 - 6 May 1993, CAIRO, May 1993, Page 231-241 PDF (2.63 MB) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/asat.1993.25625 | ||||
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Author | ||||
Hatem H. DAKEN | ||||
Assist Professor of Mechanical Design and Head, Design with Innovative Materials Group, Military Technical College, Cairo, EGYPT. | ||||
Abstract | ||||
Two experimental investigations have demonstrated the extreme usefulness of using wire strain gages in studying the mechanical behavior of com-posites. Wire strain gages have also shown their capacity in detecting some splitting failure types in notched composites under tensile loads. The first investigation entailed notched [07 8 unidirectional graphite/epoxy composites. An arrangement of wire strain gages around the notch boundary has easily detected the onset ofsplitting damage in the specimen. Splitting damage is through-the-thickness matrix cracks emanating from the notch tips and propagating along the filament direction. The second investigation entailed notched [0/145°Js graphite/epoxy laminates. Splitting damage in both the 0° and 45° plies have been identified using a modified gage arrangement. | ||||
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