Deformation and damage of liquid-filled cylindrical shell composite structures subjected to repeated explosion loads: Experimental and numerical study

Abstract

The dynamic response and structural damage of liquid-filled cylindrical shell composite structures, with different wall thicknesses and at varying stand-off distances, under repeated explosion loading were studied experimentally. The explosion resistance of liquid-filled cylindrical shell composite structures influenced by the wall thickness and stand-off distances was clarified, and the resistance thickness and critical distance were determined. The effect of internal liquid filling enhance the ability of the cylindrical shell to resist explosion loading was verified by experimental data. A stronger explosive load and greater deformation result in a more obvious enhancement effect of liquid filling on the cylindrical shell structure.The deformation and damage results of the liquid-filled cylindrical shell composite structures were divided into five typical modes. Three major modes were analysed numerically. By means of numerical simulation, the deformation and damage processes of the liquid-filled cylindrical shell composite structures subjected to repeated explosive loading were studied. The energy transformation directions of the three major modes were investigated in their respective deformation processes.