Mechanical properties of copper nanocube under three-axial tensile loadings

The mechanical properties of copper nanocubes by molecular dynamics are investigated in this paper. The 100, 110, 111 nanocubes are created, and their energies, yield stresses, hydrostatic stresses, Mises stresses, and the relationships between them and strain are analyzed. Some concepts of the microscopic damage mechanics are introduced, which are the basis of studying the damage mechanical properties by molecular dynamics. The 100 nanocube exhibits homogeneity and isotropy and achieves a balance easily. The 110 nanocube presents transverse isotropy. The 111 nanocube shows the complexity and anisotropy because the orientation sizes in three directions are different. The broken point occurs on a surface, but the other two do not. The 100 orientation model will be an ideal model for studying the microscopic damage theory.