Ballistic Performance of Thin Aluminium Cylindrical and Hemispherical Shells

摘要

The objective of study was to carry out the numerical simulation to compare the ballistic resistance failure mode and energy-dispersed characteristic of Al-H1100 thin hemispherical shell and cylindrical shell. Span diameter (200 mm), thickness (0.7 and 1 mm) and mass of hemispherical and cylindrical shells kept constant for direct comparison. Ogive-nosed projectiles of 19 mm diameter, 50.8 mm length and 52 mass were impacted at tip of the both shells target. Finite element modelling was carried out by using Abaqus explicit solver. Numerical result of cylindrical shell was elucidated against experimental result of hemispherical shell. The response of both the targets was compared in terms of global deformation, residual velocity, ballistic limit, failure mode and energy dispersed in plastic deformation. Result shows that the cylindrical shell outperformed than the hemispherical shell due to the large global deformation. Also both the cylindrical and hemispherical target failed by hole enlargement with petal formation.