Dresden 2017 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 58: Nanomaterials I

MM 58.5: Vortrag

Donnerstag, 23. März 2017, 11:15–11:30, IFW D

Stability of carbon nanotubes under hydrostatic pressure investigated by Monte Carlo simulations — •Markus Hartmann — Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Vienna, Austria

Carbon nanostructures are a fascinating class of materials combining high stiffness with low weight and exceptional toughness that makes carbon a promising candidate for applications in structural mechanics. Understanding the mechanical properties of these structures on every length scale is of utmost importance to be able to exploit the full potential of these materials. Monte Carlo simulations are a perfect tool to gain an insight into the complex deformation behavior of carbon nanostructures like graphene [1], nanotubes [2] and fullerenes [3] on an atomic scale. In the presented work I will discuss investigations on the mechanical stability of carbon nanotubes under hydrostatic pressure. Carbon nanotubes of different sizes and chiralities will be investigated. The shape of the initially circular cross-section of the tubes will be monitored. Under increasing load it first ovalizes into an elliptic shape, upon further increase of the load the shape further evolves into a peanut-like shape. Finally I will discuss the effect of nanotube size on the critical collapse pressure.

[1] Hartmann et al., Europhys. Lett. 103, 68004 (2013)

[2] Sun et al., Proc. Appl. Math. Mech. 13, 7 (2013)

[3] Holec et al., Phys. Rev. B 81, 235403 (2010)