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Shock formation and rate effects in impacted carbon nanotube foams

Thevamaran, Ramathasan and Meshot, Eric R. and Daraio, Chiara (2015) Shock formation and rate effects in impacted carbon nanotube foams. Carbon, 84 . pp. 390-398. ISSN 0008-6223. https://resolver.caltech.edu/CaltechAUTHORS:20141222-104530792

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Abstract

We investigate rate-effects in the dynamic response of vertically aligned carbon nanotube (VACNT) foams excited by impacts at controlled velocities. They exhibit a complex rate-dependent loading–unloading response at low impact velocities and they support shock formation beyond a critical velocity. The measured critical velocities are ∼10 times lower than in other foams of similar densities—a desirable characteristic in impact protective applications. In-situ high-speed microscopy reveals strain localization and progressive buckling at low velocities and a crush-front propagation during shock compression. We correlate these responses to quantitative measurements of the density gradient and fiber morphology, obtained with spatially resolved X-ray scattering and mass attenuation.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.carbon.2014.12.006DOIArticle
http://www.sciencedirect.com/science/article/pii/S0008622314011567PublisherArticle
http://www.sciencedirect.com/science/article/pii/S0008622314011567#m0005Related ItemSupplementary Data
http://www.sciencedirect.com/science/article/pii/S0008622314011567#m0010Related ItemSupplementary Data
http://www.sciencedirect.com/science/article/pii/S0008622314011567#m0015Related ItemSupplementary Data
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ORCID:
AuthorORCID
Thevamaran, Ramathasan0000-0001-5058-6167
Meshot, Eric R.0000-0002-7951-6696
Daraio, Chiara0000-0001-5296-4440
Additional Information:© 2014 Elsevier Ltd. Received 21 August 2014. Accepted 1 December 2014. Available online 5 December 2014. We thank Ludovica Lattanzi and Wei-Hsun Lin for assistance in preparing the educational video, Jan Rys (ETH Zurich) and Darwin Zwissler (UC Berkeley, USA) for assistance during experiments. We acknowledge financial support from the Institute for Collaborative Biotechnologies (ICB) under the contract W911NF-09-D-0001 with the Army Research Office (ARO). A portion of this work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-7NA27344. X-ray characterization was performed at beamline 7.3.3 at the Advanced Light Source, which is supported by the Director, Office of Science, and Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
Funders:
Funding AgencyGrant Number
Army Research Office (ARO)W911NF-09-D-0001
Department of Energy (DOE)DE-AC52-07NA27344
Department of Energy (DOE)DE-AC02-05CH11231
Record Number:CaltechAUTHORS:20141222-104530792
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20141222-104530792
Official Citation:Ramathasan Thevamaran, Eric R. Meshot, Chiara Daraio, Shock formation and rate effects in impacted carbon nanotube foams, Carbon, Volume 84, April 2015, Pages 390-398, ISSN 0008-6223, http://dx.doi.org/10.1016/j.carbon.2014.12.006. (http://www.sciencedirect.com/science/article/pii/S0008622314011567)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:53084
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:22 Dec 2014 19:43
Last Modified:03 Oct 2019 07:47

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