NUMERICAL INVESTIGATION OF AIR-BLAST PERFORMANCE OF CROSS-FILLED HONEYCOMB SANDWICH PANEL

Today's biggest terrorist attack is the blast. The public and property are suffering significant harm as a result of the explosion. However, the modern period is looking for a structure that is blast-proof to safeguard people and pricey properties from explosions. Sandwich panels have an excellent capacity to absorb energy under blast as well as impact loads. As a result, a unique blast-proof sandwich panel was created in this study by using a cross- filled reinforced square honeycomb core. The investigation of blast mitigation performance through experiment is very dangerous, costly, and environmentally polluting. However, to overcome these issues, by using ABAQUS/Explicit, the blast mitigation performance of the modelled honeycomb sandwich panels was examined for a constant stand-off distance (SoD) of 100 mm at 1 kg to 3 kg TNT air-blast loadings. This study was carried out after the mesh convergence and validation studies. The new sandwich panel design's blast resistance was examined by measuring the face deflection and energy absorption capabilities under airblast loadings. A sandwich panel made of a reinforced square honeycomb core significantly increases blast resistance by reducing face deflection and increasing energy absorption contribution by the core. Compared to the sandwich panel with a square honeycomb core and a cross honeycomb core, the novel designed sandwich panel exhibits greater core energy absorption contribution, a smaller front face, and smaller rear face deflection at all applied air-blast pressures. Therefore, the sandwich made with a cross-filled square honeycomb core has the greatest blast-proof properties. The newly created sandwich panel may be used for several armoured vehicle components to protect soldiers.