面向激光增材制造的仿生薄壁结构抗冲击研究  

Study on impact resistance of bio-inspired thin-walled structure for laser additive manufacturing

作　　者：李佳 宋梅利[1] 冯君[2] 汤海斌 LI Jia;SONG Meii;FENG Jun;TANG Haibin(School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China;State Key Laboratory of Transient Physics,Nanjing University of Science and Technology,Nanjing 210094,China;School of Intelligent Manufacturing,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学机械工程学院,江苏南京210094 [2]南京理工大学瞬态物理国家重点实验室,江苏南京210094 [3]南京理工大学智能制造学院,江苏南京210094

出　　处：《工程设计学报》2024年第1期67-73,共7页Chinese Journal of Engineering Design

基　　金：国家自然科学基金资助项目(52305382);航空航天结构力学及控制全国重点实验室开放课题(MCMS-E-0423Y01)。

摘　　要：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。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.

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 

分 类 号：TH122[机械工程—机械设计及理论]