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The Effects of Fiber Orientation and Adhesives on Tensile Properties of Carbon Fiber Reinforced Polymer Matrix Composite with Embedded Nickel-Titanium Shape Memory AlloysNickel-titanium (NiTi) shape memory alloy (SMA) sections were embedded within carbon fiber reinforced polymer matrix composite (CFRPPMC) laminates and their tensile properties were evaluated with simultaneous monitoring of modal acoustic emissions. The test specimens were fabricated in three different layup configurations and two different thin film adhesives were applied to bond the SMA with the PMC. A trio of acoustic sensors were attached to the specimens during tensile testing to monitor the modal acoustic emission (AE) as the materials experienced mechanical failure. The values of ultimate tensile strengths, strains, and moduli were obtained. Cumulative AE energy of events and specimen failure location were determined. In conjunction, optical and scanning electron microscopy techniques were used to examine the break areas of the specimens. The analysis of AE data revealed failure locations within the specimens which were validated from the microscopic images. The placement of 90 deg plies in the outer ply gave the strongest acoustic signals during break as well as the cleanest break of the samples tested. Overlapping 0 deg ply layers surrounding the SMA was found to be the best scenario to prevent failure of the specimen itself.
Document ID
20170011148
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Quade, Derek J.
(NASA Glenn Research Center Cleveland, OH, United States)
Jana, Sadhan C.
(Akron Univ. Akron, OH, United States)
Morscher, Gregory N.
(Akron Univ. Akron, OH, United States)
Kannan, Manigandan
(Akron Univ. Akron, OH, United States)
McCorkle, Linda S.
(Ohio Aerospace Inst. Brook Park, OH, United States)
Date Acquired
November 17, 2017
Publication Date
November 1, 2017
Subject Category
Chemistry And Materials (General)
Report/Patent Number
NASA/TM-2017-219703
E-19435
GRC-E-DAA-TN46795
Funding Number(s)
WBS: WBS 826611.04.03.01
CONTRACT_GRANT: NNC13BA10B
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
shape memory alloy
polymer matrix composites
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