STRENGTH OF LOW-DIMENSIONAL NANO-STRUCTURE
The purpose of this project is to investigate the strength of nano-structures.First,we put on the focus to the mechanics of crack initiation from the free interface edge in nano-meter scale structures.We propose an experimental method for evaluating the initiation crack strength.The interface crack initiation in the structures is governed by the singular stress field,and the criterion is prescribed by the stress intensity parameter.Then,a compression test for a single crystal column with diameters ofseveral tens of nanometers is conducted with an In-situ transmission electron microscope (TEM) observation.The nanocolumn has a high yield stress and a specific deformation behavior different from those of a bulk single crystal.
Nano-structure Strength Interface Crack initiation Deformation
T.Kitamura T.Sumigawa H.Hirakata Y.Takahash
Department of Mechanical Engineering and Science,Kyoto University,Kyoto 606-8501,Japan Department of Mechanical Engineering,Osaka University,Suita,Osaka 565-0871,Japan
国际会议
第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)
安徽黄山
英文
79-88
2008-06-03（万方平台首次上网日期，不代表论文的发表时间）