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工程设计学报
Chinese Journal of Engineering Design  2024, Vol. 31 Issue (1): 67-73    DOI: 10.3785/j.issn.1006-754X.2024.03.317
Reliability and Quality Design     
Study on impact resistance of bio-inspired thin-walled structure for laser additive manufacturing
Jia LI1(),Meili SONG1,Jun FENG2,Haibin TANG3()
1.School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
2.State Key Laboratory of Transient Physics, Nanjing University of Science and Technology, Nanjing 210094, China
3.School of Intelligent Manufacturing, Nanjing University of Science and Technology, Nanjing 210094, China
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Abstract  

The impact load is an important factor in the structural design of aerospace equipment. The design of thin-walled structures with high load-bearing capacity and good energy-absorbing characteristics is a research focus. Based on Voronoi algorithm, the pseudo-random arrangement of structure similar to honeycomb hexagon was developed by combining the structural characteristics of bone and honeycomb. According to the arrangement of loose inside and tight outside of the bone, a new type of impact resistant structure was constructed by partition design.The impact resistance simulation of bio-inspired thin-walled structure and uniform honeycomb structure of laser selective melted titanium alloy and laser selective sintered carbon fiber/PEEK (polyether ether ketone) composites was conducted to compare the energy-absorbing characteristics of the two kinds of structure. The simulation results showed that the maximum energy-absorption of the bio-inspired thin-walled structure of laser selective melting titanium alloy and laser selective sintered carbon fiber/PEEK composites was increased by 17.7% and 27.7% respectively, compared with the uniform honeycomb structure under axial impact, and the maximum energy-absorption was increased by 422.6% and 99.2% respectively under lateral impact.The bio-inspired thin-walled structure designed has important application prospects in aerospace field.

Key words： thin-walled structure      bio-inspired design      impact resistant      laser selective melting      laser selective sintering     
Received: 20 October 2023      Published: 04 March 2024
CLC:  TH 122  
Corresponding Authors: Haibin TANG     E-mail: lijia9317@njust.edu.cn;htang28@njust.edu.cn
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Jia LI
Meili SONG
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Haibin TANG
Cite this article:

Jia LI,Meili SONG,Jun FENG,Haibin TANG. Study on impact resistance of bio-inspired thin-walled structure for laser additive manufacturing. Chinese Journal of Engineering Design, 2024, 31(1): 67-73.

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https://www.zjujournals.com/gcsjxb/10.3785/j.issn.1006-754X.2024.03.317     OR     https://www.zjujournals.com/gcsjxb/Y2024/V31/I1/67


面向激光增材制造的仿生薄壁结构抗冲击研究

冲击载荷是航空航天装备结构设计中不可忽视的因素，设计承载能力高、吸能特性好的薄壁结构是研究热点。综合骨骼和蜂窝的结构特征，基于Voronoi算法，开展了类蜂窝六边形结构伪随机排布；参考骨质内疏松外紧密的排布特征，进行分区设计，来构造新型抗冲击结构。通过激光选区熔化钛合金及激光选区烧结碳纤维/PEEK（polyether ether ketone，聚醚醚酮）复合材料仿生薄壁结构和均布蜂窝结构的抗冲击仿真，对比了2种结构的吸能特性。仿真结果表明：相比于均布蜂窝结构，在轴向冲击条件下，激光选区熔化钛合金和激光选区烧结纤维/PEEK复合材料仿生薄壁结构的最大吸能量分别提高了17.7%和27.7%；在侧向冲击条件下，最大吸能量分别提高了422.6%和99.2%。所设计的仿生薄壁抗冲击结构在航空航天领域具有重要的应用前景。


关键词： 薄壁结构,  仿生设计,  抗冲击,  激光选区熔化,  激光选区烧结 
Fig.1 Schematic of generation process of structure similar to honeycomb hexagon based on Voronoi algorithm
Fig.2 models of bio-inspired thin-walled structure and uniform honeycomb structure
Fig.3 Finite element simulation model of bio-inspired thin-walled structure under axial impact resistance
塑性应力/MPa塑性应变
1 086.000
1 090.651.636×10-5
1 162.120.001 090 0
1 173.540.002 646 5
1 180.770.010 949 1
1 181.050.015 992 0
1 181.150.021 022 7
1 181.180.024 363 3
Table 1 Plasticity parameters of laser selective melted titanium alloy
塑性应力/MPa塑性应变
46.000 00
51.899 10.000 870
67.647 80.003 220
77.508 20.004 840
83.544 10.005 904
90.527 20.007 182
99.843 60.009 092
109.997 00.011 528
115.231 40.013 060
117.300 00.014 724
Table 2 Plasticity parameters of laser selective sintered carbon fiber/PEEK composites
Fig.4 Simulation result of axial impact resistance of bio-inspired thin-walled structure and uniform honeycomb structure of laser selective melted titanium alloy
Fig.5 Simulation result of axial impact resistance of bio-inspired thin-walled structure and uniform honeycomb structure of laser selective sintered carbon fiber/PEEK composites
Fig.6 Simulation result of lateral impact resistance of bio-inspired thin-walled structure and uniform honeycomb structure of laser selective melted titanium alloy
Fig.7 Simulation result of lateral impact resistance of bio-inspired thin-walled structure and uniform honeycomb structure of laser selective sintered carbon fiber/PEEK composites
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