This paper investigates the characteristics of the deformation and perforation on thin-walled structures under ballistic impacts based on the DYNA3D numerical simulations. Perforation mechanisms of plates and numerical modelling techniques to simulate the response of thin-walled structures under ballistic impacts are discussed to some extent. A benchmark study on deformation and perforation of steel plates struck by a rigid projectile is made by a comparison with DYNA3D simulations and existing experimental results where available. Perforation behaviour of a naval shipside structure impacted by a cannon ball is simulated by DYNA3D. By the regression analysis of the present DYNA3D computations and some existing test data, a new empirical formula that relates impact energy absorbed up to perforation of the target plate with the impact velocity of the projectile is developed. The developed formula can cover a wider range of the impact velocity up to 800 m/s, while existing formulae are valid up to 120 m/s. It is concluded that the technology developed from the present study will be useful for design and hazard assessment of thin-walled structures to avoid the perforation by ballistic impacts.
On deformation and perforation of ship structures under ballistic impacts
Ships and Offshore Structures ; 2 , 3 ; 217-226
2007-11-26
Article (Journal)
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On deformation and perforation of ship structures under ballistic impacts
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