2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 7: Yang Intl. Symp. / Multiscale Material Mechanics
| Editors: | Kongoli F, Aifantis E, Wang H, Zhu T |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 190 pages |
| ISBN: | 978-1-987820-48-5 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Study On Mechanical Behaviors Of Carbon Nanotube/Polyvinyl Alcohol Composite Fibers By Coarse-Grained Molecular Dynamics Simulations
Xia Liu1; Qingsheng Yang2;1BEIJING UNIVERSITY OF TECHNOLOGY, Beijing, China; 2, Beijing, China;
Type of Paper: Regular
Id Paper: 422
Topic: 1
Abstract:
Continuous carbon nanotube (CNT) fibers are made of numerous well aligned meso-scale bundles, where micro-scale CNTs are closely packed together. Hence, the mechanical properties of the CNT fibers, including tensile strength, Young¡¯s modulus and flexibility, greatly benefit from the hierarchical structure of CNTs. To better understand how the CNT fibers gain their mechanical performance, a comprehensive investigation of the mechanical behavior and microstructural evolution of the CNT fibers is conducted using coarse-grained molecular dynamics simulations. Then, simulations of monotonic and cyclic tensile tests are also conducted to study plastic deformation behavior of the CNT fiber. Besides, it is found that the CNT fibers can be further enhanced through polymer infiltration during the spinning process. Accordingly, to reveal the enhancing mechanism from the microscopic aspect, the self-densified microstructure and enhanced properties of the CNT/polymer composite fibers are also analyzed by performing coarse-grained molecular dynamics simulations. Moreover, the dependence of the mechanical behavior on the microstructure of the composite fiber under different strain rates is revealed. Further, the roles of chain size and density of the polymers on the reinforcement effect are explored as well.
Keywords:
Composite; Deformation; Mechanics; Multiscale; Plasticity;References:
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