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Volume 36 Issue 2
Apr 2022
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Chinese Journal of High Pressure Physics  > 2022  >  36(2): 024201.
YANG Fan, BIAN Yijie, WANG Peng, LI Puhao, ZHANG Siyuan, FAN Hualin. Crashworthiness and Energy Absorption Properties of Polycrystal-Like Lattice Structures Strengthened by Interfaces[J]. Chinese Journal of High Pressure Physics, 2022, 36(2): 024201. doi: 10.11858/gywlxb.20210827
Citation: YANG Fan, BIAN Yijie, WANG Peng, LI Puhao, ZHANG Siyuan, FAN Hualin. Crashworthiness and Energy Absorption Properties of Polycrystal-Like Lattice Structures Strengthened by Interfaces[J]. Chinese Journal of High Pressure Physics, 2022, 36(2): 024201. doi: 10.11858/gywlxb.20210827
shu

Crashworthiness and Energy Absorption Properties of Polycrystal-Like Lattice Structures Strengthened by Interfaces

doi: 10.11858/gywlxb.20210827
  • 1.

    School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China

  • 2.

    State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, Jiangsu, China

  • Received Date: 21 Jun 2021
  • Rev Recd Date: 09 Jul 2021
    Abstract
  • Benefitted by the 3D printing technologies, metallic lattice materials have gained remarkable development. Energy absorption is one of the most important applications for lattice materials. This paper presents our recent work on the energy absorption of polycrystal-like lattice materials. Inspired by the grain boundary strengthening mechanisms of polycrystalline metals, the polycrystalline-like macroscopic lattice structures were designed and constructed by introducing the macro grain boundaries or twin boundaries. Attention will be paid to the crashworthiness and energy absorption properties of the new structures. Specifically, three types of polycrystal-like lattice structures with the simple cubic lattice, the face-centered cubic lattice, and the triclinic lattice cell configurations were created. A parametric study was carried out using the finite element simulations and the quasi-static compression tests based on additive manufacturing technology. The influences of the grain size (i.e., grain boundary density), the grain boundary mis-orientation angle, the interface orientation angle on the deformation modes and the energy absorption properties were investigated. It is found that the interfaces with high symmetry can mostly enhance the energy absorption capability of the lattice structures. Further study demonstrates that the Hall-Petch relationship that was usually used to describe the grain boundary strengthening mechanism of polycrystalline materials can also be applied to the macro polycrystal-like lattice structures. This paper is expected to provide guides for the development of new lightweight energy absorption structures.

     

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