@article{417b8a5caee142b482349050c5346ad3,
title = "Augmentation of low frequency damping via hydrogen-doping in a hybrid shape memory alloy composite",
abstract = "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]s 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.",
author = "Shashank Nagrale and Brown, {Avery D.} and Bakis, {Charles E.} and Hamilton, {Reginald F.}",
note = "Funding Information: We thank Dr. Beth Last and the Penn State Materials Research Institute for their expertise and technical assistance with DMA; Mr. Richard LaSalle, Mr. Nicholas Carrier, and Mr. Jeffrey Kim of the Penn State Engineering Science and Mechanics Department for technical assistance with DSC and data reduction, for technical assistance with post-processing treatments, and for technical assistance with composite processing and data reduction, respectively; and Dr. Albert Foster in Dr. Zoubeida Ounaies{\textquoteright} group in the Penn State Mechanical Engineering Department for assistance with dynamic testing of wires. The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the National Science Foundation under Grant No. CMMI-1538354. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Funding Information: The authors disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was supported by the National Science Foundation under Grant No. CMMI-1538354. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. Publisher Copyright: {\textcopyright} The Author(s) 2021.",
year = "2022",
month = may,
doi = "10.1177/1045389X211039021",
language = "English (US)",
volume = "33",
pages = "1018--1027",
journal = "Journal of Intelligent Material Systems and Structures",
issn = "1045-389X",
publisher = "SAGE Publications Ltd",
number = "8",
}