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Structural Engineering and Mechanics
  Volume 72, Number 6, December25 2019 , pages 763-774
DOI: https://doi.org/10.12989/sem.2019.72.6.763
 


Enhancing the static behavior of laminated composite plates using a porous layer
Yuan Yuan, Ke Zhao and Kuo Xu

 
Abstract
    The main aim of this paper is enhancing design of traditional laminated composite plates subjected to static loads. In this regard, this paper suggests embedding a lightweight porous layer in the middle of laminated composite as the core layer of the resulted sandwich plate. The static responses of the suggested structures with uniform, symmetric and non-symmetric porosity distributions are compared to optimize their design. Using the first order shear deformation theories, the static governing equations of the suggested laminated composite plates with a porous layer (LCPPL) rested on two-parameter foundation are obtained. A finite element method is also utilized to solve the governing equations of LCPPLs. Effects of laminated composite and porosity characteristics as well as geometry dimension, edges\' boundary conditions and foundation coefficients on the static deflection and stress distribution of the suggested composite plates have been investigated. The results reveal that the use of core between the layers of laminated composites leads to a sharp reduction in the static deflections of LCPPLs. Furthermore, in compare with perfect cores, the use of porous core between the layers of laminated composite plates can offer a considerable reduction in structural weight without a significant difference in their static responses.
 
Key Words
    lightweight structures; plate design; porosity effects; laminated composites; static loads
 
Address
School of Mechanical and Precision Instrument Engineering, Xi\'an University of Technology,
Xi\'an, 710048, China
 

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