Abstract

Nanowires have many technological applications as manipulators, force sensors and probes in nano-electromechanical systems. With the increasing ratio of surface area to bulk, surface effects play an important role in the mechanical response of nanowires. In this paper, we consider the influence of residual surface stress and surface elasticity on the postbuckling state of nanowires. The geometric nonlinear finite deformation theory is adopted to describe the large deflection and the midplane stretching in postbuckling, and the shooting method is employed to obtain the postbuckling path and the buckled configurations. This study might be helpful to accurately calibrate the nanowire-based force sensors and design nanowire-based devices in a wide range of applications.

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