| Title |
A Numerical Investigation of the Mechanical behavior of Nanocrystalline Copper |
| Authors |
김형섭(H . S . Kim) ; 원창환(C . W . Won) ; 조성석(S . S . Cho) ; 천병선(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. |