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High strain rate response of nanofiber interlayered structural composites

Özden-Yenigün, Elif and Bilge, Kaan and Sünbüloğlu, Emin and Bozdağ, Ergün and Papila, Melih (2017) High strain rate response of nanofiber interlayered structural composites. Composite Structures, 168 . pp. 47-55. ISSN 0263-8223 (Print) 1879-1085 (Online)

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Official URL: http://dx.doi.org/10.1016/j.compstruct.2017.02.007

Abstract

Nanofibrous interlayer toughening strategy for laminated composite materials typically demonstrated at quasi-static loading is here evaluated under high strain rate deformation. Carbon fiber reinforced composite laminates of (0/90)(25s) stacking sequence are interlayered by polystyrene-co-glycidyl methacrylate (P(St-co-GMA)) nanofibers which are chemically tuned for interfacial compatibility when embedded in epoxy matrix. The cubical composite specimens are cut and subjected to high strain-rate deformation via Split Hopkinson pressure bar testing. Specimens are hit at their through-the-thickness (stacking) and side-to-side (in-plane) directions. The change in the dissipation of energy due to altered interlaminar microstructure is monitored and reported. Enhancement in the capacity of the energy dissipation due to the nanofibrous interlayers is as high as 80% in-plane and 40% through thickness directions, depending on the strain rate. The results overall suggest that interlayer toughening strategy used in this work prevents the formation of critical matrix cracks that can cause the formation of instantaneous mode II delamination. Incorporation of the nanofibers without causing notable weight penalty effectively toughen the matrix dominant interlaminar zones under high strain rate conditions as well.

Item Type:Article
Uncontrolled Keywords:Electrospinning; Nanofibers; Split Hopkinson pressure bar; lnterlayer; High strain rate deformation; Toughening
Subjects:T Technology > TA Engineering (General). Civil engineering (General) > TA401-492 Materials of engineering and construction. Mechanics of materials
ID Code:31350
Deposited By:Melih Papila
Deposited On:15 May 2017 16:23
Last Modified:15 May 2017 16:23

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