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Smart Structures and Systems
  Volume 22, Number 3, September 2018 , pages 327-334
DOI: https://doi.org/10.12989/sss.2018.22.3.327
 


Dynamic buckling of smart sandwich beam subjected to electric field based on hyperbolic piezoelasticity theory
Maryam Shokravi

 
Abstract
    In this paper, dynamic buckling of the smart subjected to blast load subjected to electric field is studied. The sandwich structure is rested on Pasternak foundation with springs and shear elements. Applying piezoelasticity theory and hyperbolic shear deformation beam theory (HSDBT), the motion equations are derived by energy method. For calculating the dynamic instability region (DIR) of the sandwich structure, differential quadrature method (DQM) along with Bolotin method is used. The aim of this study is to investigate the effects of applied voltage, geometrical parameters of structure and boundary conditions on the DIR of the structure. The results show that applying negative voltage, the DIR will be happened at higher excitation frequencies. In addition, the clamped-clamped beam leads to higher excitation frequency with respect to simply supported boundary condition.
 
Key Words
     dynamic buckling; electric field; HSDBT; DQM; piezoelasticity theory
 
Address
Maryam Shokravi: Buein Zahra Technical University, Buein Zahra, Qazvin, Iran
 

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