Nonlinear three-dimensional stability characteristics of geometrically imperfect nanoshells under axial compression and surface residual stress

نویسندگان

چکیده

Abstract Through reduction of thickness value in nanostructures, the features surface elasticity become more prominent due to having a high surface-to-volume ratio. The main aim this research work was examine residual stress effect on three-dimensional nonlinear stability characteristics geometrically perfect and imperfect cylindrical shells at nanoscale under axial compression. To do so, an unconventional shell model established via combination formulations Gurtin–Murdoch theory elasticity. silicon material is selected as case study, which most utilized design micro-electromechanically systems. Then, moving Kriging meshfree approach applied take numerically into account free energy effects initial geometrical imperfection curves. Accordingly, considered domain discretized set nodes together using quadratic polynomial type basis shape functions appropriate correlation function. It found that lead increase critical buckling load nanoshell about 82.4 % 82.4 \% for 2 nm 2{\rm{nm}} , 32.4 32.4 5 5{\rm{nm}} 15.8 15.8 10 10{\rm{nm}} 7.5 7.5 20 20{\rm{nm}} . These enhancements 92.9 92.9 36.5 36.5 17.7 17.7 8.8 8.8

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ژورنال

عنوان ژورنال: Nanotechnology reviews

سال: 2023

ISSN: ['2191-9097', '2191-9089']

DOI: https://doi.org/10.1515/ntrev-2022-0551