HOMONGENIZATION AND DIMENSIONAL REDUCTION OF THE NANO-SIZED HONEYCOMB STRUCTURES CONSIDERING SURFACE EFFECT

摘要: Recently, as fabrication of the nano-sized structures has been realized with the development of manufacturing technology, nano-sized device and systems are now applied to various science and engineering fields [1, 2]. Interestingly, functionality is emphasized in nano scale since unexpected properties appear in nano-sized device. Mechanical and thermal behavior show unique feature in nano size because nano-sized structures have very high ratio of the surface area to the volume. Such nanosized structures exhibit different material behaviors compared with the macro-structures. Therefore, many researchers have tried to clarify these unusual size-dependent phenomena. The surface effect causes this phenomenon, and it comes from the difference of atomistic bonding states between the inner part and free surfaces of the nano-sized structure. This surface effect is negligible in the macro-sized structures, however, it has a significant influence in the nano-sized structures. For the analysis of NEMS device or system the atomistic simulations are generally required. However, the atomistic simulation takes too much time to analyze the nano-sized structures so that alternative efficient analysis methods are needed. For this reason, the analysis method based on continuum theory has been developed by combining with surface elasticity has been developed [3, 4, 5] In this study, the mechanical behavior of the nano-sized honeycomb structures is investigated by combining the well-established homogenization method. For the analysis of the nano-sized honeycomb structures considering the surface effect, the homogenization and dimensional …