期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2017
卷号：6
期号：3
页码：4507
DOI：10.15680/IJIRSET.2017.0603207
出版社：S&S Publications
摘要：ThereThree-dimensional finite element (FE) model for armchair, zigzag and choral single-walled carbonnanotubes (SWCNTs) is proposed. The model development is based on the assumption that carbon nanotubes, whensubjected to loading, behave like space-frame structures. The bonds between carbons atoms are considered asconnecting load-carrying members, while the carbon atoms as joints of the members. To create the FE models, nodesare placed at the locations of carbon atoms and the bonds between them are modeled using three-dimensional elasticbeam elements. The elastic module of beam elements are determined by using a linkage between molecular andcontinuum mechanics. The investigation includes armchair and zigzag SWCNTs.It is found that the choice of Vander wall forces, the interaction significantly affects the calculation ofYoung’s modulus. The obtained values of Young’s modulus agree very well with the corresponding theoretical resultsand many experimental measurements. Dependence of elastic module to diameter and length of the nanotubes is alsoobtained. The presented results demonstrate that the proposed FE model may provide a valuable tool for studyingthe mechanical behavior of carbon nanotubes and their integration in nanocomposites. So for we dealt with singlewalled carbon nanotubes, in our case, we are going to consider into doubled walled carbon nanotubes generallyspeaking multi-walled carbon nanotubes.The therefore properties so obtained is completely different that of single walled. The DWCNT Thenmodeled in ANSYS-metaphysics then in is analyzed for the mechanical properties using the same. The elements wereconsidered as beam4, it is an uniaxial element with tension, compression, torsion, and bending capabilities. Theelement has six degrees of freedom at each node: translations in the nodal x, y, and z directions and rotations about thenodal x, y, and z axes. Stress stiffening and large deflection capabilities are included. The interaction between the twolayers of the MWCNT, the Vander walls integration, is considered in the calculation of mechanical parameter .Theintegration are also made of beam element, which researchers have not so far attempted to work on.
