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Materials 2017, 10(4), 408; doi:10.3390/ma10040408

Fracture Analysis of MWCNT/Epoxy Nanocomposite Film Deposited on Aluminum Substrate

Department of Mechanical Engineering, Yuan Ze University, Chung-Li 320, Taiwan
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Author to whom correspondence should be addressed.
Academic Editor: It-Meng (Jim) Low
Received: 23 February 2017 / Revised: 9 April 2017 / Accepted: 11 April 2017 / Published: 13 April 2017
(This article belongs to the Special Issue The Failure Micromechanics and Toughening Mechanisms of Materials)
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Abstract

Multi-walled carbon nanotube (MWCNT) reinforced epoxy films were deposited on an aluminum substrate by a hot-pressing process. Three-point bending tests were performed to determine the Young’s modulus of MWCNT reinforced nanocomposite films. Compared to the neat epoxy film, nanocomposite film with 1 wt % of MWCNT exhibits an increase of 21% in the Young’s modulus. Four-point-bending tests were conducted to investigate the fracture toughness of the MWCNT/epoxy nanocomposite film deposited on an aluminum substrate with interfacial cracks. Based on the Euler-Bernoulli beam theory, the strain energy in a film/substrate composite beam is derived. The difference of strain energy before and after the propagation of the interfacial crack are calculated, leading to the determination of the strain energy release rate. Experimental test results show that the fracture toughness of the nanocomposite film deposited on the aluminum substrate increases with the increase in the MWCNT content. View Full-Text
Keywords: multi-walled carbon nanotube; nanocomposite film; strain energy release rate; fracture toughness multi-walled carbon nanotube; nanocomposite film; strain energy release rate; fracture toughness
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Her, S.-C.; Chien, P.-C. Fracture Analysis of MWCNT/Epoxy Nanocomposite Film Deposited on Aluminum Substrate. Materials 2017, 10, 408.

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