自锁式内凹负泊松比结构设计及吸能特性研究

李永祥; 孙东洋; 吴志兵; 安瑛莹; 郝清玄; 徐尧尧; 刘旭畅; 杨金水

doi:10.7652/xjtuxb202603015

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自锁式内凹负泊松比结构设计及吸能特性研究

更新时间：2026-03-09

- 自锁式内凹负泊松比结构设计及吸能特性研究
- Design and Energy Absorption Characteristics of Self-Locking Concave Negative Poisson’s Ratio Structure
- 西安交通大学学报 2026年60卷第3期页码：155-165
- 作者机构：
  
  广州汽车集团股份有限公司汽车工程研究院，511434，广州
  哈尔滨工程大学青岛创新发展基地，266000，山东青岛
  哈尔滨工程大学航天与建筑工程学院，150001，哈尔滨
- 作者简介：
  
  作者简介：李永祥（1975—），男，工程师；
  杨金水（通信作者），男，教授，博士生导师。
- 基金信息：
  
  国家自然科学基金资助项目。(12172098)
- DOI：10.7652/xjtuxb202603015
  中图分类号： TB332
- 收稿：2025-07-16，
  
  纸质出版：2026-03-10
- 稿件说明：
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李永祥, 孙东洋, 吴志兵, 等. 自锁式内凹负泊松比结构设计及吸能特性研究[J]. 西安交通大学学报, 2026,60(3):155-165.

LI Yongxiang, SUN Dongyang, WU Zhibing, et al. Design and Energy Absorption Characteristics of Self-Locking Concave Negative Poisson’s Ratio Structure[J]. Journal of Xi'an Jiaotong University, 2026, 60(3): 155-165.
李永祥, 孙东洋, 吴志兵, 等. 自锁式内凹负泊松比结构设计及吸能特性研究[J]. 西安交通大学学报, 2026,60(3):155-165. DOI： 10.7652/xjtuxb202603015.

LI Yongxiang, SUN Dongyang, WU Zhibing, et al. Design and Energy Absorption Characteristics of Self-Locking Concave Negative Poisson’s Ratio Structure[J]. Journal of Xi'an Jiaotong University, 2026, 60(3): 155-165. DOI： 10.7652/xjtuxb202603015.

摘要

为解决传统负泊松比结构一体化成型导致损坏后需整体替换的问题，采用离散化思想，提出了一种新型自锁式负泊松比结构，通过在内凹六边形两侧以及中间腹部区域设计椭圆形嵌锁区域，充分保证了结构在压缩过程中能有效互锁。采用3D打印工艺制备试样，通过准静态压缩试验获得单胞和装配试样的力学响应。此外，通过有限元法进一步分析腹板倾斜角度、壁厚等关键参数对结构力学性能和能量吸收特性的影响规律。研究发现，相较单胞样件，整体装配结构的比吸能提高了31.5%，平均压溃力提高了577.7%。新型自锁式负泊松比结构具有优异的力学性能和能量吸收特性，增加腹板倾角和壁厚可有效提升结构的比吸能、平均压溃力和负泊松比效应，但会一定程度降低结构的稳定性。研究成果可为模块化、低成本、高吸能新型结构技术提供理论指导。

Abstract

To address the issue of complete replacement required for conventional negative Poisson’s ratio structures damaged due to monolithic fabrication

this study proposes a novel self-locking negative Poisson’s ratio structure based on a discrete design approach.Elliptical interlocking regions are designed on both sides and the central web area of the re-entrant hexagon to ensure effective mutual locking during compression.Specimens are fabricated via 3 D printing

and the mechanical responses of both unit-cell and assembled specimens are obtained through quasi-static compression tests.Furthermore

the influence of key parameters

such as the inclination angle of the web plates and the wall thickness

on the mechanical performance and energy absorption characteristics of the structure is analyzed numerically using the finite element method.The results demonstrate that compared to the unit-cell specimen

the assembled structure exhibits a 31.5% improvement in specific energy absorption and a 577.7% increase in average crushing force.The self-locking negative Poisson’s ratio structure shows superior mechanical performance and energy absorption capabilities.Increasing the web inclination angle and wall thickness enhances specific energy absorption

average crushing force

and the negative Poisson’s ratio effect

but slightly reduces structural stability.The findings of this study provide theoretical guidance for developing modular

low-cost

high-energy-absorption structural technologies.

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Keywords

references

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