Stability of micro-beam including Higher-Order Beam Theories under thermal and mechanical forces

Publish Year: 1394
نوع سند: مقاله کنفرانسی
زبان: English
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CEUCONF03_358

تاریخ نمایه سازی: 16 شهریور 1395

Abstract:

This paper investigatesthe effects of thermal load and shear force on the buckling of nanobeams.Higherorder shear deformation beam theoriesare implementedand their predictions of the critical buckling load and postbuckled configurations are compared to those ofEuler-Bernoulli and Timoshenkobeam theories.The Eringen model for nonlocal elasticity is adopted to account formaterial discontinuity at the nano-scale and analytical solutionsfor critical buckling loads and post-buckling configurations are derived for each beam theory.Results show that thermal loadhas a more significant impact on the buckling behavior ofsimplysupported beams (SS) than it has onclamped-clamped (CC)beams. However, the nonlocal effect has more impact on C-C beams that it does on S-S beams.Moreover, it was found that the predictions obtained fromTimoshenko beam theoryare identical to those obtained using all higherorder shear deformation theories, suggesting that Timoshenko beam theory is sufficientto analyze buckling in nanobeams

Authors

E Mokhtar

Islamic azad university Shahin shahr branch–faculty member of civil engineering

Amir hoessin yosefi

Islamic azad university Shahin shahr branch– faculty member of civil engineering

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