Twisting Carbon Nanotube Ropes with the Mesoscopic Distinct Element Method: Geometry, Packing, and Nanomechanics

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• 作者：Yuezhou Wang ; Igor Ostanin ; Cristian Gaid膬u ; Traian Dumitric菐
• 刊名：Langmuir
• 出版年：2015
• 出版时间：November 17, 2015
• 年：2015
• 卷：31
• 期：45
• 页码：12323-12327
• 全文大小：370K
• ISSN：1520-5827

文摘

The geometry and internal packing of twisted ropes composed of carbon nanotubes (CNTs) are considered, and a numerical solution in the context of the mesoscopic distinct element method (MDEM) is proposed. Compared to the state of the art, MDEM accounts in a computationally tractable manner for both the deformation of the fiber and the distributed van der Waals cohesive energy between fibers. These features enable us to investigate the torsional response in a new regime where the twisted rope develops packing rearrangements and aspect-ratio-dependent geometric nonlinearities. MDEM emerges as a robust simulation method for studying twisted agglomerates comprising semiflexible nanofibers.