Journal of Jilin University(Engineering and Technology Edition) ›› 2024, Vol. 54 ›› Issue (1): 259-267.doi: 10.13229/j.cnki.jdxbgxb.20230802

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New honeycomb multi-stage thin-walled structure with high efficiency energy absorption characteristics

Yong-zhong ZHANG1,2(),Yun-hai MA1,3   

  1. 1.College of Biological and Agricultural Engineering，Jilin University，Changchun 130022，China
    2.Intelligent Electronic Manufacturing Research Center，Beijing City University，Beijing 101309，China
    3.Institute of Structured and Architected Materials，Liaoning Academy of Materials，Shenyang 110167，China
  • Received:2023-07-30 Online:2024-01-30 Published:2024-03-28

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Abstract:

The existing thin-walled structure has the problem of low specific energy absorption and low compression efficiency. The honeycomb was used as a prototype to simulate the multi-level nested structure of honeycomb and the optimization design of bionic structure was carried out. In order to better explore the influence of shape parameters on energy absorption capacity， a total of 20 honeycomb multi-stage thin-walled structures were designed based on the relative rotation angle and the diameter of the reinforced column. Using 3D printing technology， a multi-stage thin-walled structure sample of imitation honeycomb made of nylon was prepared， and a quasi-static compression test was carried out. Finally， the numerical simulation results and experimental results are compared and analyzed， and the following conclusions are drawn： the model with the strongest energy absorption capacity in this paper is YMT20-3.6， reaching 10.87 J·g-1， which is about 86% higher than that of the initial model YMT0-0. The larger the rotation angle， the larger the diameter of the reinforcement column， the more uniform the distribution of the cross-sectional area of the model， the symmetrical deformation mode of the model， and the stronger its energy absorption capacity. A larger rotation angle has better energy absorption， but its compression force efficiency is less. Increasing the diameter of the model strengthening column can reduce the influence of rotation angle on the compression force efficiency and improve the compression force efficiency of the model， so as to obtain a thin-walled structure with strong energy absorption capacity and high compression force efficiency.

Key words: bionic design, multi-level structure, additive manufacturing, efficient energy absorption

CLC Number: 

  • TP391

Fig.1

Design of honeycomb-like multi-cell thin-wall structures"

Fig.2

Nylon material characteristic curve"

Fig.3

Finite element model of MT structure"

Table 2

Nylon material parameter"

参数数值
密度/（kg·m-3）1140
泊松比0.3
弹性模量/MPa630
屈服应力/MPa36
切线模量/MPa115

Fig.4

Grid-independent analysis"

Fig.5

Force displacement curve and average crushing force"

Fig.6

Compression deformation process and stresscloud diagram of sample"

Fig.7

Sample deformation mode"

Fig.8

Comparison of energy absorption characteristics of honeycomb-like multi-cell thin-wall structure"

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