Abstract
The phenomena of surface, interface, and size effects are the determinative factors in the prediction of the mechanical behavior of multiphase nanowires. The interatomic bond lengths and charge density distribution associated with the surface and interface layers of the relaxed configuration of such nanostructures, in the absence of any external loadings, differ from those of the bulk remarkably. Second strain gradient theory due to its competency in capturing the above mentioned effects will be employed to examine the relaxation of carbon-coated silicon nanowire, carbon nanoshell, and silicon nanowire. Using this theory their effective Young’s modulus will also be estimated. To this end, the mathematical framework of second strain gradient theory will be presented in cylindrical coordinate system. For further illustrations, the Lamé type problem for a carbon nanotube where its inner and outer surfaces have strong, weak, and no interactions will be considered. Moreover, the size-dependent stress concentration phenomenon associated with an unbounded carbon plate weakened by a circular hole under remote biaxial loading is addressed. For verification of the theoretical treatment, the relaxation problems will be reexamined by employing atomistic simulation using LAMMPS and some suitable potentials.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.