Augmentation of Low Frequency Damping via Hydrogen Doping in a Hybrid Shape Memory Alloy Composite
Carbon fiber reinforced polymer (CFRP) composites hybridized with hydrogen-doped NiTi wires can be used to design structures requiring high stiffness and high damping in the low frequency range, such as helicopter blades. The current work investigates aging and hydrogen-doping for high damping without hydrogen embrittlement. We establish a hydrogenation treatment that (i) results in a response that is repeatable in the martensitic phase and after exposure to composite processing temperatures and (ii) increases the loss factor in NiTi wires by nearly 470%. By embedding H-doped wires exhibiting the highest damping into the interlayers of a [0/±45] carbon/epoxy laminate at a volume fraction of 0.1, the hybrid NiTi-CFRP composite loss factor increases by 170%. The measured dynamic properties were found to be close to micromechanical predictions based on the properties of the NiTi and CFRP.
Shashank Nagrale et al, Augmentation of low frequency damping via hydrogen-doping in a hybrid shape memory alloy composite, Journal of Intelligent Material Systems and Structures (, ) pp. . Copyright © 2021. DOI: 10.1177/1045389x211039021. Users who receive access to an article through a repository are reminded that the article is protected by copyright and reuse is restricted to non-commercial and no derivative uses. Users may also download and save a local copy of an article accessed in an institutional repository for the user's personal reference. For permission to reuse an article, please follow our Process for Requesting Permission.
|Work Title||Augmentation of Low Frequency Damping via Hydrogen Doping in a Hybrid Shape Memory Alloy Composite|
|License||In Copyright (Rights Reserved)|
|Publication Date||August 14, 2021|
|Publisher Identifier (DOI)||
|Deposited||May 26, 2022|
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