발간논문

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Vol.35, No.8, 967 ~ 972, 1997
Title
A Numerical Investigation of the Mechanical behavior of Nanocrystalline Copper
김형섭 , 원창환 , 조성석 , 천병선 H . S . Kim , C . W . Won , S . S . Cho , B . S . Chun
Abstract
The effect of grain size on the overall elastic and plastic properties of nanocrystalline materials has been evaluated using the elasto-plastic finite element method. The tensile deformation behavior of nanocrystalline copper(based on a unit cell model comprising 2 to 100 ㎚-sized copper crystallites and 1 ㎚-wide grain boundaries) has been analyzed. Assuming that the material is elastic-perfectly plastic (because of the very fine grain size), it has been shown that the yield stress increased and the elastic modulus decreased with a decrease in grain size. These results are consistent with the reported experimental observations. This analysis can be effectively used to predict the mechanical behavior of any type of nanocrystalline material.
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