Investigation of Behavior and Analysis of Mechanical Properties of Carbon Nanotubes under Different Loads

In this research, the behavior and mechanical properties of carbon nanotubes under different loads (tensile and torsional) have been investigated by the finite element method with SOLIDWORKS Simulation software. Examination of carbon nanotubes by selecting the wrong element and large size of the elements leads to high error in the model and in contrast to the high mesh density increases the analysis time, accumulation of rounding error and finally causes stiffness in the carbon structure. According to the obtained results, the obtained elastic properties for the model with beam element are about ۹% more than the three-dimensional model and also about ۱۱% more than the continuous shell model. Also, the elastic properties of the three-dimensional model are about ۲% higher than the continuous shell model. Examining the results of these models, it can be seen that for both armature and zigzag structures, shell, beam and three-dimensional elements give better results than each other, respectively. Understanding the results of this study helps to select the best type of element and arrangement for the analysis of carbon nanotubes in different conditions and applications. To check the accuracy of the results, the buckling behavior of carbon nanotubes with both zigzag and armature structures with beam, shell and three-dimensional elements under eccentricity has been performed. The results show that the selection of shell elements for carbon nanotubes with any structure gives better results and is in good agreement with the other reported results.

کلیدواژه ها:

Carbon nanotubes ، Mechanical properties ، Finite element method ، Zigzag and armature structures ، Covalent bonds