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Acta Armamentarii ›› 2024, Vol. 45 ›› Issue (9): 3091-3104.doi: 10.12382/bgxb.2023.0607

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Numerical Simulation of Blast Resistance of Foam-filled Auxetic Honeycomb Sandwich Structures

KONG Xiangqing1,2,*(), LI Ruonan1, CHANG Yahui1, FU Ying3   

  1. 1 School of Civil Engineering, Liaoning University of Technology, Jinzhou 121001, Liaoning, China
    2 College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao 266580, Shandong, China
    3 Songshan Lake Material Laboratory, Dongguan 523000, Guangdong, China
  • Received:2023-06-25 Online:2023-10-24
  • Contact: KONG Xiangqing

Abstract:

The dynamic response of foam-filled auxetic honeycomb sandwich structure (FAHSS) under blast load and its protective performance against concrete slabs are studied. A finite element numerical model of FAHSS under blast load, which considers the effect of strain rate on the dynamic intrinsic properties of the material, is established by utilizing finite element software ANSYS/LS-DYNA. The numerical model is validated by the existing auxetic honeycomb sandwich structure (AHSS) explosion test. The damage and failure law and energy absorption characteristics of FAHSS and its influence on the stress distribution of concrete slab are analyzed based on the validated model. FAHSS is compared with AHSS and foam sandwich structure (FSS). On this basis, the effects of polyurethane foam material density, explosion proportional distance and filling material on the blast resistance performance of FAHSS are considered. The results show that the foam filling in FAHSS reduces the damage degree of auxetic honeycomb sandwich structure. With the increase in the density of polyurethane foam material, the energy absorption of foam material in FAHSS increases. With the increase in scaled distances, the damage degree of FAHSS gradually decreases, and the damage mode changes from local damage to overall damage.

Key words: auxetic honeycomb sandwich structure, polyurethane foam, blast load, protective performance, finite element analysis

CLC Number: