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Structural Engineering and Mechanics
  Volume 74, Number 6, June25 2020, pages 737-745
DOI: http://dx.doi.org/10.12989/sem.2020.74.6.737
 


Blast resistance of a ceramic-metal armour subjected to air explosion: A parametric study
Mohammad Javad Rezaei, Mahdi Gerdooei and Hasan Ghaforian Nosrati

 
Abstract
    Nowadays, composite plates are widely used as high-strength structures to fabricate a dynamic loading-resistant armours. In this study, the shock load is applied by an explosion of spherical TNT charge at a specified distance from the circular composite plate. The composite plate contains a two-layer ceramic-metal armour and a poly-methyl methacrylate (PMMA) target layer. The dynamic behavior of the composite armour has been investigated by measuring the transferred effective stress and maximum deflection into the target layer. For this purpose, the simulation of the blast loading upon the composite structure was performed by using the load-blast enhanced (LBE) procedure in Ls-Dyna software. The effect of main process parameters such as the thickness of layers, and scaled distance has been examined on the specific stiffness of the structure using response surface method. After validating the results by comparing with the experimental results, the optimal values for these parameters along with the regression equations for transferred effective stress and displacement to the target have been obtained. Finally, the optimal values of input parameters have been specified to achieve minimum transferred stress and displacement, simultaneously with reducing the weight of the structure.
 
Key Words
    shock wave; composite armour; ceramic-metal; optimization; response surface method
 
Address
Mohammad Javad Rezaei, Mahdi Gerdooei: Faculty of Mechanical and Mechatronics Engineering, Shahrood University of Technology, Shahrood, Iran
Hasan Ghaforian Nosrati: Department of Mechanical Engineering, Esfarayen University of Technology, Esfarayen, North Khorasan, Iran
 

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