The Effect of Pore Size on the Mechanical Properties of Biaxially Stretched Silver Nanoplates

Abstract

In this study, we investigate the mechanical properties of silver nanoplates with pores under biaxial stretching using energy, natural strain, and stress as characterization parameters. Furthermore, we analyze the effect of different pore radius ratios on these mechanical properties. Our analysis, using molecular dynamics methods, reveals that shear stress on dislocations leads to the destruction of the silver nanoplates model. We also found that the fracture time of silver nanoplates is affected by the pore radius ratio; models with larger pore radius ratios have smaller shear stresses and are destroyed earlier. Moreover, we observed that dislocation forms at the corners of square silver nanoplates, and as deformation increases, the dislocation gradually approaches the center of the hole. The closer the hole position is to the model boundary, the greater the shear stress will be. Finally, we demonstrate that when the hole is oval, it creates a new asymmetric dislocation line at its tip, which causes differences in mechanical properties.