Energy absorption of auxetic honeycomb with graded beam thickness based on Bezier curve

IF 5 1区工程技术 Q1 ENGINEERING, AEROSPACE Aerospace Science and Technology Pub Date : 2024-09-28 DOI:10.1016/j.ast.2024.109619

Jianzhong Zhou , Yifan Wang , Huichen Luo , Guanghua Zhao , Jie Chen , Yingying Cui , Liangmo Wang , Qiang Gao , Xiaoyu Wang

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Abstract

In order to improve the energy absorption and lightweight of the structure, a novel auxetic honeycomb with graded beam thickness based on Bezier curve (BZH) is proposed on the basis of the double arrow negative Poisson ratio honeycomb. The finite element model of BZH under axial compression is established, and its accuracy is verified by experiments. Compared with a honeycomb of uniform beam thickness (DUH) of the same mass, the thickness of the beam becomes thicker in the middle and thinner on both sides, which causes the BZH to produce more plastic hinges when compressed, and the energy absorption is increased by 12 %. By parameter analysis of beam thickness distribution trend, the mechanical properties of BZH can be effectively controlled. A theoretical model of BZH under quasi-static compression is also established and the BZH configuration is optimized by proxy modeling technique and NSGA-II algorithm. The results show that the SEA of the optimized structure is increased from 5.23 kJ·kg^-1 to 6.17 kJ·kg^-1, and the energy efficiency is reduced from 3.44 kN to 2.96 kN. Therefore, auxetic honeycomb with graded beam thickness based on Bezier curve has great potential in the field of energy absorption.

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基于贝塞尔曲线的梁厚度分级辅助蜂窝的能量吸收

为了提高结构的能量吸收能力和轻质性，在双箭负泊松比蜂窝的基础上，提出了一种基于贝塞尔曲线的新型分级梁厚辅助蜂窝（BZH）。建立了轴向压缩下 BZH 的有限元模型，并通过实验验证了其准确性。与相同质量的均匀梁厚蜂窝（DUH）相比，梁的厚度中部变厚，两侧变薄，这使得 BZH 在受压时产生更多的塑性铰，能量吸收增加了 12%。通过对梁厚度分布趋势的参数分析，可以有效控制 BZH 的力学性能。此外，还建立了准静态压缩下 BZH 的理论模型，并通过代理建模技术和 NSGA-II 算法对 BZH 配置进行了优化。结果表明，优化结构的 SEA 从 5.23 kJ-kg-1 增加到 6.17 kJ-kg-1，能效从 3.44 kN 降低到 2.96 kN。因此，基于贝塞尔曲线的分级梁厚度辅助蜂窝在能量吸收领域具有巨大潜力。

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.