翻訳と辞書 Words near each other ・ Mechanised Infantry Regiment ・ Mechanised Transport Corps ・ Mechanical Moth ・ Mechanical network ・ Mechanical organ ・ Mechanical overload ・ Mechanical pencil ・ Mechanical pest control ・ Mechanical philosophy ・ Mechanical Plastics Corp. ・ Mechanical plating ・ Mechanical Poet ・ Mechanical powder press ・ Mechanical probe station ・ Mechanical properties of biomaterials ・ Mechanical properties of carbon nanotubes ・ Mechanical puzzle ・ Mechanical rectifier ・ Mechanical resonance ・ Mechanical Resonance (album) ・ Mechanical room ・ Mechanical Royalty (album) ・ Mechanical Science and Engineering ・ Mechanical screening ・ Mechanical similarity ・ Mechanical singularity ・ Mechanical snubber ・ Mechanical Spin Phenomena ・ Mechanical splice ・ Mechanical stoker Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Mechanical properties of carbon nanotubes ： ウィキペディア英語版 Mechanical properties of carbon nanotubes This article considers the mechanical properties of carbon nanotubes in the radial (transverse) direction. Carbon nanotubes are one of the strongest materials in nature. Carbon nanotubes (CNTs) are long hollow cylinders of graphene. Although graphene sheets have 2D symmetry, carbon nanotubes by geometry have different properties in axial and radial directions. It has been shown that CNTs are very strong in the axial direction.〔 〕 Young's modulus on the order of and tensile strength of were obtained.〔 On the other hand, there was evidence that in the radial direction they are rather soft. The first transmission electron microscope observation of radial elasticity suggested that even the van der Waals forces can deform two adjacent nanotubes. Later, nanoindentations with atomic force microscope were performed by several groups to quantitatively measure radial elasticity of multiwalled carbon nanotubes and tapping/contact mode atomic force microscopy was also performed on single-walled carbon nanotubes. Young's modulus of on the order of several GPa showed that CNTs are in fact very soft in the radial direction. Radial direction elasticity of CNTs is important especially for carbon nanotube composites where the embedded tubes are subjected to large deformation in the transverse direction under the applied load on the composite structure. One of the main problems in characterizing the radial elasticity of CNTs is the knowledge about the internal radius of the CNT; carbon nanotubes with identical outer diameter may have different internal diameter (or the number of walls). In 2008, a method using an atomic force microscope was introduced to determine the exact number of layers and hence the internal diameter of the CNT. In this way, mechanical characterization is more accurate. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mechanical properties of carbon nanotubes」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.