Experimental and numerical study on the cumulative damage of water-filled containers impacted by two projectiles. (February 2019)

• Record Type: Journal Article
• Authors: Ji, Yangziyi; Li, Xiangdong; Zhou, Lanwei; Lan, Xiaoying
• Is Part Of: Thin-walled structures. Volume 135(2019)
• Page Start: 45
• Page End: 64
• Publication Date: 2019-02
• Subjects: Water-filled container -- Hydrodynamic ram -- Full-clamped plate -- Failure modes -- FE simulations -- Cumulative effects; Thin-walled structures -- Periodicals; 690.1
• DOI: 10.1016/j.tws.2018.10.043
• Languages: English
• ISSNs: 0263-8231

Abstract

Abstract: High-velocity impact on fluid-filled containers is a matter of interest in the studies of aircraft fuel tank vulnerability. Most of the conducted studies have addressed this problem by considering single impact. However, the present study evaluated experimentally the cumulative damage of a water-filled container impacted by two spherical projectiles with varying velocities in the range of 1000 m/s and 1500 m/s. A specially designed aluminum sabot was used to enable a 25 mm powder gun to accelerate two tungsten projectiles simultaneously. The failure modes of the plates were also analyzed after the experiments. LS-DYNA code was used to simulate this complex fluid–structure interaction problem. The residual velocity of the projectile, pressure within the water, and plate deformation profile obtained from both the experiment and simulation were compared to verify the simulation model. The experimentally verified finite element models were further used to investigate several critical factors in cumulative damage. Highlights: An experimental study on the cumulative damage of water-filled container impacted by two spherical projectiles were conducted. The failure mode of the plates after the experiments was analyzed. A experimental verified numerical model was used to analyze the impact process.