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A Revisit of Internal Force Diagrams on Nanobeams with Surface Effects

机译:具有表面效应的纳米束内力图的再研究

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It is evident that surface effects dealing with decreasing characteristic size play an extremely important role in the mechanical behaviors of nanoscale structures, from the one-dimensional nanowire to complex microano device. In the present study, the impact of surface effects on the internal forces of a nanobeam is evaluated in terms of the action of the residual surface stress and surface elasticity. Through deriving the expressions of the shear force and bending moment analytically, we depicted the updated internal force diagrams accordingly. Unlike the classical ones in mechanics of materials, the nanobeams take on a strong size-dependent feature. These analyses hold great potential for modulating the mechanical performance of microano materials, and the obtained results provide new insight into the education innovation on mechanics of materials.
机译:显而易见,从一维纳米线到复杂的微/纳米器件,涉及减小特征尺寸的表面效应在纳米级结构的机械行为中起着极其重要的作用。在本研究中,根据残余表面应力和表面弹性的作用来评估表面效应对纳米束内力的影响。通过分析得出剪切力和弯矩的表达式,我们相应地描述了更新后的内力图。与经典的材料力学不同,纳米束具有强大的尺寸依赖性。这些分析对于调节微纳材料的力学性能具有巨大的潜力,并且获得的结果为材料力学的教育创新提供了新的见识。

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