Numerical Investigations on Blast Protection System with Metallic Tube Core Sandwich Panels
Abstract: - Effect of blast loads from explosion can be mitigated by using thick armor systems that are often heavy and significantly increase the self-weight of the structure. In the design of structure for blast protection, sacrificial claddings which consist of high energy absorbing elements are used. A sandwich type protective structure consists of light weight core which is often used for blast mitigation. The choice of core type has an influence on the performance of sandwich panel. The cores can be of wood, foam material and tubular elements. In this study, behavior of sandwich panel with square tubular core is investigated through numerical studies. Panel is made of mild steel having top plate dimension of 150 mm x 150 mm x 2.5 mm; tbottom plate of 150 mm x 150 mm x 5 mm and square tube core of 12.5 mm x 12.5 mm with 0.6 mm thickness. A finite element model is developed and validated using experimental results in literature. Parametric studies are carried out using the validated finite element model. By varying the tube length of the core, the responses of the panels in terms of energy absorption and reaction forces are compared.
Author : K. Uma Maheswari
