Multi-objective optimization for designing metallic corrugated core sandwich panels under air blast loading

Abstract

This research aims to improve the blast performance of trapezoidal corrugated core sandwich panel under air blast loading. A finite element model for the prediction of dynamic responses of trapezoidal corrugated core sandwich panel was first proposed and validated by experiments. Based on the simulation results, kriging models were established to approximate the relationships between design variables and blast performances, and correlation analyses were carried out to investigate the effects of the design variables on the maximum back face deflection and specific energy absorption. It is found that any decrease in maximum back face deflection would always lead to undesirable deterioration in specific energy absorption, and the correlation relationships are associated with the stand-off distance. Using the developed kriging models, multi-objective design optimization was performed to seek trade-off solutions for the trapezoidal corrugated core sandwich panel under specific and variable stand-off distances. Results show that the design on Pareto fronts depended upon stand-off distance. Comparisons of the blast performance between optimized designs and initial designs turned out that there indeed existed a great potential in performance improvement. Importantly, careful examination of the responses of the optimized designs revealed some valuable design methods which should be useful for the engineering applications of trapezoidal corrugated core sandwich panel.

Enhancing mechanical properties of cellular core sandwich panels: a review of topological parameters and design improvements

“…The impact resistance increased due to high face to core attachment and load transfer capacities. Cai et al [91] examined the enhancement of a sandwich panel with a trapezoidal corrugated core, under the air blast loading condition. The study focused on achieving an optimal TZSP design that balances deformation response and energy absorption response under blast loading conditions The study revealed that the use of corrugated cores improved the overall performance of the plates.…”

Numerical Analysis on the Dynamic Response of PVC Foam/Polyurea Composite Sandwich Panels under the Close Air Blast Loading

“…Because of its lightweight structure, easy production, and excellent mechanical properties, sandwich panels are widely used in civil and military fields, including the aerospace, navigation, construction, and automation industries. For this purpose, researchers have investigated the response of sandwich panels under high-intensity dynamic loading and explored various core materials, including honeycomb cores [ 4 , 5 , 6 ], corrugated-core [ 7 , 8 , 9 ], porous foam materials [ 10 , 11 , 12 , 13 ], metal lattices [ 14 , 15 ], balsa wood [ 16 ], and others. Porous foam materials’ low density and weight make them an ideal choice for lightweight applications, effectively reducing the overall weight of structures and decreasing energy consumption.…”

Structural optimization and experimental study on the Ti-alloy Kagome structure formed by the superplastic forming/diffusion bonding process

“…Additionally, the Kriging model allows for the generation of surrogate models, which can significantly reduce the computational cost associated with evaluating the mechanical response of lattice structures. 19 Du et al 20 implemented the optimization of the high-accuracy hierarchical Kriging model by using the hybrid optimization algorithm and applied the model to the structural dynamic optimization of rocket engines.…”