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Acta Armamentarii ›› 2017, Vol. 38 ›› Issue (9): 1845-1853.doi: 10.3969/j.issn.1000-1093.2017.09.023

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3D Printing of Military Helmet Liner Structure Based on Topology Optimization

JIANG Miao-wen 1,2, YAN Jian-zhuo2, CHEN Ji-min1,2   

  1. (1.Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China;2.Beijing Digital Medical 3D Printing Engineering Technology Center, Beijing 100124, China)
  • Received:2017-03-02 Revised:2017-03-02 Online:2017-11-03

Abstract: A lightweight design method of military helmet liner structure based on the topology optimization technology is presented for the lightweight design of military helmet. The advantages of 3D printing in the shape of complex structures are taken to set up a lightweight design process for the helmet liner structure, in which includes the computer modeling, numerical simulation, 3D printing, and engineering verification. A topological optimization algorithm based on the minimum potential energy is summarized according to the finite element analysis method. In the design process, the computer-aided design software UG is used to perform 3D modeling for design objects, and the computer-aided analysis software HyperMesh in HyperWorks is used to build a finite element model, and view the displacement results of the topology optimization model whether the design structure meets the constraints through OptiStruct in HyperWorks for the topology optimization. In order to meet the functions of the energy absorption and anticollision, a honeycomb-type energy absorbing structure is added on the side of topologically optimized helmet liner. In experiment, solidThinking Inspire software is used to verify the helmet liner with the honeycomb structure. The simulation shows that the maximum equivalent stresses of Von-Mises before and after topology optimization are similar. The experimental model is tested, and the load capacities of helmets before and after optimization are compared. The experimental results show that, in the case of certain constraints and functional requirements, the purpose of the lightweight design can be achieved, the weight reduction can reach to 17.14%, and the maximum bearing capacity of the topologically optimized structure reaches to 93.72% of the original structure. At the same time, 3D printing technology with numerical simulation can shorten the research and development cycle, and improve manufacturing efficiency. Key

Key words: ordnancescienceandtechnology, numericalsimulation, three-dimensionalprinting, militaryhelmetliner, topologyoptimization, honeycombenergyabsorptionstructure

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