[2007] On deformation and perforation of ship structures under ballist…
최고관리자 | 07-11-04 11:25
Ships and Offshore Structures
Vol.2, Issue 3, pp.217 - 226, September 2007
On deformation and perforation of ship structures under ballistic impacts
Author(s): J. k. Paik and S. H. Won
Abstract: 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 modeling 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 behavior 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.
Vol.2, Issue 3, pp.217 - 226, September 2007
On deformation and perforation of ship structures under ballistic impacts
Author(s): J. k. Paik and S. H. Won
Abstract: 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 modeling 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 behavior 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.