scholarly journals Electro-mechanical shear buckling of piezoelectric nanoplate using modified couple stress theory based on simplified first order shear deformation theory

2017 ◽  
Vol 48 ◽  
pp. 196-207 ◽  
Author(s):  
Mohammad Malikan
Keyword(s):  
Shear Deformation ◽  
Couple Stress ◽  
Deformation Theory ◽  
Couple Stress Theory ◽  
Shear Deformation Theory ◽  
Modified Couple Stress Theory ◽  
Stress Theory ◽  
First Order ◽  
Shear Buckling ◽  
Modified Couple Stress

scholarly journals Free Vibration Analysis of Shear Deformable Small-Scale Tubes

2020 ◽  
Vol 3 (1) ◽  
pp. 418-427
Author(s):  
Reza Aghazadeh
Keyword(s):  
Free Vibration ◽  
Shear Deformation ◽  
Couple Stress ◽  
Couple Stress Theory ◽  
Free Vibration Analysis ◽  
Modified Couple Stress Theory ◽  
Small Scale ◽  
Tube Model ◽  
Stress Theory ◽  
Modified Couple Stress

This study presents an approach for investigating free vibration problem of small-scale tubes based on modified couple stress theory in conjunction with higher order shear deformation tube model. The size effect is captured through utilization of a length scale parameter involved in modified couple stress theory. A newly developed refined tube model is employed to satisfy friction-free conditions on inner and outer surfaces of micro-tubes. Hamilton’s principle is used as a variational technique for derivation of governing system of equations. For axial vibrations, an analytical procedure is conducted, while for transverse vibrations differential quadrature method is used as a numerical technique. The correctness of numerical results are verified through comparisons made with results which are available in the literature for limiting cases. The analyses reveal the effects of size and transverse shear deformation on the natural frequencies of micro-tubes.

First-order shear deformation theory for orthotropic doubly-curved shells based on a modified couple stress elasticity

2018 ◽  
Vol 73 ◽  
pp. 129-147 ◽  
Author(s):  
Farajollah Zare Jouneghani ◽  
Payam Mohammadi Dashtaki ◽  
Rossana Dimitri ◽  
Michele Bacciocchi ◽  
Francesco Tornabene
Keyword(s):  
Shear Deformation ◽  
Couple Stress ◽  
Deformation Theory ◽  
Shear Deformation Theory ◽  
First Order ◽  
Doubly Curved Shells ◽  
Couple Stress Elasticity ◽  
Modified Couple Stress ◽  
Doubly Curved
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