A novel hybrid star honeycomb with individually adjustable second plateau stresses

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

Composite Structures Pub Date : 2025-02-01 DOI:10.1016/j.compstruct.2025.118881

Xuelin Li , Zhuangzhuang Li , Zhuoyu Guo , Zongtao Guo , Zonglai Mo , Jun Li

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引用次数: 0

Abstract

Auxetic honeycombs, especially those with double-plateau stress characteristics, have become a hot research area in energy absorption. Hence, in this study, a novel star double-arrow honeycomb (SDAH) is constructed via a combined design of star honeycomb and double-arrow honeycomb. The mechanical properties of SDAH under quasi-static crushing were analyzed in depth using theoretical derivation and numerical simulation, and corresponding experimental verification studies were conducted. Theoretical, experimental, and numerical results show that SDAH exhibits two-step deformation characteristics with two plateau regions on its stress–strain curve. Based on the collapse mechanism of representative cell elements, a theoretical model to predict the stresses of the two plateaus was established. Subsequently, a systematic parametric study reveals that adjusting the design parameters controlling the double-arrow geometrical configuration can control the second plateau stress of SDAH individually. In addition, the cell wall angle of the star structure mainly affects the deformation mode, dual-plateau characteristics, and Poisson’s ratio of SDAH. Finally, a comparative study with the classical star honeycomb reveals that the SDAH exhibits a higher specific stress level and enhanced energy absorption capacity. The proposed SDAH has the property that the second plateau stress can be adjusted individually, making it a promising future application in the field of smart energy absorption.

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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.