Ballistic Fracturing of Carbon Nanotubes
S Ozden and LD Machado and C Tiwary and PAS Autreto and R Vajtai and EV Barrera and DS Galvao and PM Ajayan, ACS APPLIED MATERIALS & INTERFACES, 8, 24819-24825 (2016).
Advanced materials with multifunctional capabilities and high resistance to hypervelocity, impact are of great interest to the designers of aerospace structures. Carbon nanotubes (CNTs) with their lightweight and high strength properties are alternative-to metals and/or metallic alloys conventionally used in aerospace-applications. Here we report, a detailed study on the ballistic fracturing of CNTs for different velocity ranges. Our-results show that the highly energetic impacts cause bond breakage and carbon atom rehybridizations, and sometimes extensive structural reconstructions were also observed Experimental;, observations Show the formation of nanoribbons,, nanodiamonds, and covalently interconnected nanostructures, depending On impact conditions. Fully atotnistic reactive molecular dynamics simulations were also carried out in order to gain further insights into the mechanism behind the transformation of CNTs. The simulations show that the velocity and relative-orientation of the multiple colliding :nanotubes are critical to determine the impact outcome.
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