Blast Response Studies on Metallic Tube Core Sandwich Panels

International Journal of Civil Engineering
© 2015 by SSRG - IJCE Journal
Volume 2 Issue 6
Year of Publication : 2015
Authors : S. Chaithanya Raja, Dr. J. Rajasankar, Dr. J. Guru Jawahar
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How to Cite?

S. Chaithanya Raja, Dr. J. Rajasankar, Dr. J. Guru Jawahar, "Blast Response Studies on Metallic Tube Core Sandwich Panels," SSRG International Journal of Civil Engineering, vol. 2,  no. 6, pp. 25-31, 2015. Crossref, https://doi.org/10.14445/23488352/IJCE-V2I6P106

Abstract:

Blast loading produces enormous amount of energy. It causes devastation effect to the structure that is subjecting to loading. It is essential to mitigate the blast load to make the structure sustainable and safe. Research has been carried out from decades to design protective structural member for mitigating blast loading. Sandwich panels are found out be one of such efficient structural component to be installed for periphery of structure on which blast loading is acting. In the present work effort is made in designing sandwich panel with top and bottom plates. The dimensions of 150 mm×150 mm with 4 square tubes of 12.5 mm×12.5 mm and thickness of tube of 0.6 mm in 2×2 matrix in core portion are provided. Impulse of 55 Ns is applied for duration of 17.32 μs normal to the top plate of sandwich panel. Suitability of the sandwich panel model for the present loading condition is checked. Finite element (FEM) model of the panel is modelled in FEM based software ABAQUS/CAE and analysis is done. Parametric studies are carried out by varying the thickness of square tube and spacing between the square tubes. The efficiency of sandwich panels are checked in terms of Reaction force per unit area (kN/mm2 ) and Energy (kJ) absorbed by top plate and core portion. An important conclusion from the parametric studies is drawn i.e., increase in the tube spacing beyond an optimum value results in excessive deformation without progressive lobe formation. From conclusions the model that is capable of taking load effectively is finalized.

Keywords:

Blast protection, Tube core claddings, Blast load, Thickness, Spacing, Energy absorption, Reactions.

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