Study Of The Mechanical Properties Of Nanofims

Theory to study the mechanical properties of different crystal cube nanofilms has some reference value for nano-electronics, mechanical devices, such as micro-sensors, etc. This thesis studies the bending properties of different crystal cubic nanofilms by considering the surface effect. First of all, according to the previous theory, we derived the elastic energy density, Young’s modulus and Poisson’s ratio of the different crystal cubic nanofilms. Then, considering the influence of the surface effect on nanofilms, surface elastic is introduced. Derived the different crystal cubic nanofilms’ elastic energy density, the Young’s modulus and Poisson’s ratio by considering the surface effects. And then based on the principle of minimal energy of the four reference points theory, the curvature of different crystal cubic nanofilm is given. The second, We discussed several metal(Al, Ni and Cu) along different crystal cubic nanofilms to the Young’s modulus varying with the thickness. The effects of surface effect on different crystal nanofilms Young’s modulus and the hardness situation are discussed.The last,We discuss qualitatively that the change of the radius with the thickness of different crystal cube nanofilms. Analysis of the influence of film thickness on the bending propertie. The different crystal nanofilms response to the surface stress was compared. the conclusions that the along (110) crystal films was more softer then other two crystal nanofilms were Obtained.Under the impact of the same thickness and the difference stress between the two surfaces is more easily bent. This adsorption-induced surface stress imbalance resulting in cantilever bending technique has certain reference value.