● Light weight, small volume, and high reliability protective structure. ● Liquid-filled sandwich structure with perforated front panel. ● Integrated blast suppression and blast resistance mechanisms. Internal blast loads typically exhibit complex waveforms and large cumulative impulses. Conventional antiblast structures are constrained in lightweight design, whereas blast suppression structures often suffer from insufficient reliability. Neither approach fully satisfies the growing demands for light weight, compactness, and high reliability in protective systems. To address this challenge, this study proposes an all-metallic liquid-filled sandwich structure with a perforated front panel. Impact tests using aluminum foam projectiles were conducted on purpose-designed and fabricated sandwich specimens. A numerical model combining smoothed particle hydrodynamics with the finite element method was developed to predict the dynamic response of the perforated liquid-filled sandwich. The results demonstrate that the proposed structure generates pronounced impact-induced liquid jetting along with a coupled transient structural response, providing a physical basis and design insights for subsequent blast protection studies.
Gao et al. (Fri,) studied this question.