| Summary: | 碩士 === 國立中正大學 === 機械工程所 === 95 === One dimensional nanostructures (i.e., nanowires) have been widely used in semiconductor industry due to their unique material characteristics. It is known that the properties of nanomaterials could not be realized by traditional mechanics. Our research systematically adopts
both molecular statics and dynamics simulation to study the mechanical properties (i.e., Young’s modulus, Poisson’s ratio, yield stress, etc) of nanowires in order to clarify the size dependence of mechanical properties for nanowires. The underlying mechanisms for the size effect are also examined.
It is shown from both molecular methods that the mechanical properties of nanowires depend on the lateral size of nanowires and the trend of size dependence is significantly influenced by the crystal orientations It is found that molecular statics method may not be a good way to analyze the plastic behavior of nanowires since the yield stress would be altered due to the periodic size length.
|
|---|
