Parametric study of square dome-shaped kirigami folded structure for blast mitigation

Abstract

This paper explores the potential of using Square Dome-shaped Kirigami (SDK) structures as a core component in cladding systems for blast mitigation. The study aims to assess the effectiveness of the SDK foldcore in reducing the impact of blast loading and to determine the optimal geometry of the SDK foldcore for enhanced blast mitigation using High Dimensional Model Representations (HDMR). A nonlinear finite element analysis with the ABAQUS software package has been carried out to investigate the blast mitigation capacity. The model is subjected to a quasi-static compression test to simulate the crushing effect, and the results are used to calibrate the simulation with the experimental data from the literature. Four different levels of blast loading conditions are applied to evaluate the blast resistance of the system. The structural response of the SDK foldcore is compared to that of a traditional Square Honey Comb (SHC) core with the same relative density under the same blast loading conditions. The peak load transmitted by the SDK foldcore is much more consistent than the SHC core, even under different blast loading conditions. SDK foldcore significantly improves energy absorption, resulting in better performance in mitigating the effects of blast loading. Additionally, a mathematical model using HDMR is created to assess the performance of the SDK foldcore using geometric parameters as input variables. The HDMR model enables the generation of numerous alternative design solutions, allowing designers to select the most optimal geometry for the SDK foldcore.