scholarly journals Lowest Twelve Frequencies of Sandwich Plates Using Third-Order Shear-Normal Deformation Theory

AIAA Journal ◽  
2020 ◽  
Vol 58 (4) ◽  
pp. 1821-1835
Author(s):  
Berkan Alanbay ◽  
Romesh C. Batra ◽  
Rakesh K. Kapania
Keyword(s):  
Deformation Theory ◽  
Sandwich Plates ◽  
Third Order ◽  
Normal Deformation

Free Vibration of Thick Quadrilateral Laminates Using Third-Order Shear-Normal Deformation Theory

AIAA Journal ◽  
2020 ◽  
Vol 58 (10) ◽  
pp. 4580-4594
Author(s):  
Berkan Alanbay ◽  
Rakesh K. Kapania ◽  
Romesh C. Batra
Keyword(s):  
Free Vibration ◽  
Deformation Theory ◽  
Third Order ◽  
Normal Deformation

Buckling analysis of orthotropic smart laminated nanoplates based on the nonlocal continuum mechanics using third-order shear and normal deformation theory

2018 ◽  
Vol 32 (5) ◽  
pp. 593-618
Author(s):  
Morteza Ghasemi ◽  
Abdolrahman Jaamialahmadi
Keyword(s):  
Boundary Condition ◽  
Deformation Theory ◽  
Open Circuit ◽  
Buckling Load ◽  
Closed Circuit ◽  
Third Order ◽  
Buckling Loads ◽  
Critical Buckling Load ◽  
Normal Deformation ◽  
Piezoelectric Layers

In this article, the nonlocal buckling behavior of biaxially loaded graphene sheet with piezoelectric layers based on an orthotropic intelligent laminated nanoplate model is studied. The nonlocal elasticity theory is used in the buckling analysis to show the size scale effects on the critical buckling loads. The electric potential in piezoelectric layers satisfies Maxwell’s equation for either open- or closed-circuit boundary conditions. Based on the third-order shear and normal deformation theory, the nonlinear equilibrium equations are obtained. In order to obtain the linear nonlocal stability equations, the adjacent equilibrium criterion is used. The linear nonlocal governing stability equations are solved analytically, assuming simply supported boundary condition along all edges. To validate the results, the critical buckling loads are compared with those of molecular dynamics simulations. Finally, the effects of different parameters on the critical buckling loads are studied in detail. The results show that by increasing the nonlocal parameter, the critical buckling load decreases. The piezoelectric effect increases the critical buckling load for both open- and closed-circuit boundary conditions. For open-circuit boundary condition, the variation in the critical buckling load is due to the stiffness and piezoelectric effects, but for closed circuit, it is due to the stiffness effect only. Also, the critical buckling load for open circuit is bigger than that of closed one.

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