Journal of Jilin University(Engineering and Technology Edition) ›› 2024, Vol. 54 ›› Issue (10): 3077-3084.doi: 10.13229/j.cnki.jdxbgxb.20221595

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Mechanical properties of a bionic buffer structure of a lander based on additive manufacturing

Zheng-lei YU1(),Qing CAO1,Jun-dong ZAHNG1,Peng-wei SHA1,Jing-fu JIN2(),Wan-zhen WEI1,Ping LIANG1,Zhi-hui ZHANG1   

  1. 1.Key Laboratory of Bionic Engineering，Ministry of Education，Jilin University，Changchun 130022，China
    2.College of Biological and Agricultural Engineering，Jilin University，Changchun 130022，China
  • Received:2022-12-13 Online:2024-10-01 Published:2024-11-22
  • Contact: Jing-fu JIN E-mail:zlyu@jlu.edu.cn;jinjingfu@jlu.edu.cn

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Abstract:

In order to meet the energy absorption requirement of the landing buffer， this paper starts with the buffer filling material of the buffer， draws lessons from the Kelvin structure and spiral structure， and uses the engineering bionic principle to design and establish two kinds of structure models： footballene bionic structure and multi-helix bionic structure. Considering the requirement of energy absorption and reuse of the buffer structure of the lander， the biomimetic structure samples were prepared by NiTi alloy with shape memory effect and were made by additive manufacturing technology. The mechanical properties， energy absorption ability and recoverability of the samples were analyzed and verified by simulation and experiments. The results show that the accuracy of the numerical simulation is verified by comparing the force-displacement curves of the simulation test and the isometric static pressure test， in which the multi-helix bionic structure has better mechanical properties， and its maximum energy absorption is 3 096.23 J； the recovery rates of the two structures are as high as 98.02% and 97.12%， respectively， and the recovery rate of footballene bionic structure is slightly higher. In this study， the bionic buffer structure of the leg lander is prepared by the method of adding materials， which provides a reference for the bionic design of the buffer structure of the lander.

Key words: engineering bionics, buffer structure, numerical simulation, additive manufacturing, bionic design

CLC Number: 

  • TB17

Fig.1

Bionic buffer structur"

Fig.2

Test method"

Fig.3

Grid independent"

Table 1

Comparison of the energy absorption of the two structures"

项目类足球烯仿生结构多螺旋仿生结构
试验能量吸收/10-3 J803.6442 684.64
模拟能量吸收/10-3 J876.3023 096.23
误差/%8.2913.29

Fig.4

SEM， particle size distribution of NiTi powder［31］ and mechanical properties of NiTi alloy"

Fig.5

Force-displacement curve （black） and energy absorption curve （red） of two structures"

Fig.6

Stress clouds during the simulation test of two structures and at the maximum amount of compression"

Fig.7

Reply diagram of two bionic structures"

Table 2

Recovery rates for two structures"

项目类足球烯仿生结构多螺旋仿生结构
原件/mm16.6916.68
压缩后/mm14.7214.74
回复后/mm16.3616.20
回复率/%98.0297.12
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