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Smart Structures and Systems
  Volume 25, Number 4, April 2020, pages 471-486
DOI: http://dx.doi.org/10.12989/sss.2020.25.4.471
 


Smart analysis of doubly curved piezoelectric nano shells: Electrical and mechanical buckling analysis
Mohammad Arefi

 
Abstract
    Stability analysis of three-layered piezoelectric doubly curved nano shell with accounting size dependency is performed in this paper based on first order shear deformation theory and curvilinear coordinate system relations. The elastic core is integrated with sensor and actuator layers subjected to applied electric potentials. The principle of virtual work is employed for derivation of governing equations of stability. The critical electrical and mechanical buckling loads are evaluated in terms of important parameters of the problem such as size-dependent parameter, two principle angle of doubly curved shell and two parameters of Pasternak's foundation. One can conclude that mechanical buckling loads are decreased with increase of nonlocal parameter while the electrical buckling loads are increased.
 
Key Words
    stability analysis; electrical and mechanical buckling loads; three-layered nano shells; doubly curved piezoelectric; size dependent parameter; first-order shear deformation theory; applied electric potential
 
Address
Department of Solid Mechanics, Faculty of Mechanical Engineering, University of Kashan, I.R. Iran.
 

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