Blast resistance of sandwich structures consisting of re-entrant honeycombs reinforced by catenary

IF 6.3 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composite Structures Pub Date : 2025-02-20 DOI:10.1016/j.compstruct.2025.118995

Zhen Zou , Fengxiang Xu , Xiaoqiang Niu , Yifan Zhu , Zhoushun Jiang

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引用次数: 0

Abstract

In order to further improve the blast resistance of re-entrant honeycomb (RH) cored sandwich panels while ensuring manufacturability, a sandwich panel consisting of RH reinforced by catenary is proposed, and its blast resistance is evaluated through the finite element method validated by the explosion experiments of reinforced RH (RRH) cored sandwich panels. The numerical results show that the RRH core can achieve an 18.7% decline in the maximum deflection of back facesheets, and a 25.7% increase in energy absorption, compared to the classic RH core with the same relative density. When RRH and RH cores share the same thickness, the former can achieve a 76.1% decrease in the maximum deflection of back facesheets and a 10.4% improvement in energy absorption. Furthermore, the deformation behavior of sandwich panels and core units is analyzed to determine that both the formation of more plastic hinges and a larger deformation region than those observed in classic RH cores promote the better blast resistance of RRH cored sandwich panels. Additionally, a parametric analysis is carried out to suggest that increasing the core thickness and catenary height of RRH units can further improve the anti-blast performance.

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来源期刊

Composite Structures 工程技术-材料科学：复合

CiteScore

12.00

自引率

12.70%

发文量

1246

审稿时长

78 days

期刊介绍： The past few decades have seen outstanding advances in the use of composite materials in structural applications. There can be little doubt that, within engineering circles, composites have revolutionised traditional design concepts and made possible an unparalleled range of new and exciting possibilities as viable materials for construction. Composite Structures, an International Journal, disseminates knowledge between users, manufacturers, designers and researchers involved in structures or structural components manufactured using composite materials. The journal publishes papers which contribute to knowledge in the use of composite materials in engineering structures. Papers deal with design, research and development studies, experimental investigations, theoretical analysis and fabrication techniques relevant to the application of composites in load-bearing components for assemblies, ranging from individual components such as plates and shells to complete composite structures.