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Impact absorption properties of carbon fiber reinforced bucky sponges

Thevamaran, Ramathasan and Saini, Deepika and Karakaya, Mehmet and Zhu, Jingyi and Podila, Ramakrishna and Rao, Apparao and Daraio, Chiara (2017) Impact absorption properties of carbon fiber reinforced bucky sponges. Nanotechnology, 28 (18). Art. No. 184002. ISSN 0957-4484.

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We describe the super compressible and highly recoverable response of bucky sponges as they are struck by a heavy flat-punch striker. The bucky sponges studied here are structurally stable, self-assembled mixtures of multiwalled carbon nanotubes (MWCNTs) and carbon fibers (CFs). We engineered the microstructure of the sponges by controlling their porosity using different CF contents. Their mechanical properties and energy dissipation characteristics during impact loading are presented as a function of their composition. The inclusion of CFs improves the impact force damping by up to 50% and the specific damping capacity by up to 7% compared to bucky sponges without CFs. The sponges also exhibit significantly better stress mitigation characteristics compared to vertically aligned carbon nanotube foams of similar densities. We show that delamination on the MWCNT-CF interfaces occurs during unloading, and arises from the heterogeneous fibrous microstructure of the bucky sponges.

Item Type:Article
Related URLs:
URLURL TypeDescription
Thevamaran, Ramathasan0000-0001-5058-6167
Karakaya, Mehmet0000-0002-4475-4352
Zhu, Jingyi0000-0001-7617-0557
Podila, Ramakrishna0000-0003-0472-2361
Daraio, Chiara0000-0001-5296-4440
Funding AgencyGrant Number
Army Research Office (ARO)W911NF-09-D-0001
Issue or Number:18
Record Number:CaltechAUTHORS:20170403-135058832
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75647
Deposited By: Tony Diaz
Deposited On:03 Apr 2017 21:49
Last Modified:03 Oct 2019 16:52

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