Numerical investigation on dynamic response of bio-inspired honeycomb sandwich beams under impact loading

doi:10.19936/j.cnki.2096-8000.20230728.003

Abstract

Abstract: In order to explore the impact resistance of the new bio-inspired honeycomb sandwich beam (BHSB) with double core, a 3D finite element numerical model of BHSB under the impact was established via ABAQUS finite element software. And the numerical simulation results are compared with the experimental results to verify the validity of the model. On this basis, the dynamic response of BHSB under impact load is analyzed and compared with traditional honeycomb sandwich beam (HSB). The numerical model is used to further analyze the influence of geometric parameters such as thickness of rubber core (core Ⅰ),material type and wall thickness of honeycomb sandwich (core Ⅱ) on impact load and energy absorption of BHSB. The results show that, unlike the shear failure of HSB sandwich, the failure of BHSB mainly occurs in the upper skin matrix cracking, while the sandwich remains intact. Compared with HSB, the peak force of BHSB is about twice as high and the overall deformation is smaller. With the decrease of the thickness of core Ⅰ, the impact resistance of BHSB is improved to a certain extent. The change of wall thickness of core Ⅱ has a significant effect on the impact load of the structure, but has no obvious effect on the energy absorption. To compare the dynamic response of BHSB with rubber or PMI foam, it can be seen that the impact performance of BHSB with rubber core is better than that with PMI foam core from the perspective of impact load resistance, but the latter has more advantages in terms of energy absorption effect.

Key words: bio-inspired design, finite element modelling, sandwich beam, impact resistance, composites

CLC Number:

TB332

KONG Xiangqing, ZHANG Wenping, ZHANG Huiling, ZHANG Wenjiao, LI Ruonan, FU Ying. Numerical investigation on dynamic response of bio-inspired honeycomb sandwich beams under impact loading[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(7): 19-25.

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