Optimization design of metamaterial vibration isolator with honeycomb structure based on multi-fidelity surrogate model

Qian, Jiawei; Cheng, Yuansheng; Zhang, Anfu; Zhou, Qi; Zhang, Jinlan

doi:10.1007/s00158-021-02891-6

Cited by 23 publications

(2 citation statements)

References 33 publications

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“…Auxetic materials have better indentation resistance than non-negative Poisson's ratio materials. Due to their unique deformation forms and mechanical potential, chiral auxetic structures have potential applications in stretchable electronics, biomedical devices, electronic skin, scaffolds, and reconfigurable soft robotics [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Gao et al [28] studied the influence of the geometric parameters of the six-ligament chiral structure, as well as the external factors (impact mass and impact velocity), on the structural crashworthiness parameters. With the increasing application prospects of chiral auxetic structures, some scholars have studied the deformation mechanism of spatial 3D auxetic chiral structure compression [8][9][10][11][12][13][14][15]. Xin et al [29] modified the traditional six-ligament chirality to improve the tunability of the parameters.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Defects on In-Plane Dynamic Properties of Hexagonal Ligament Chiral Structures

Zhu

et al. 2022

Sustainability

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Although the six-ligament chiral structure has many unique properties, due to its special structure, the stress concentration is prone to defects. In addition, additive manufacturing is also prone to defects. This paper studies the effect of defects, which is helpful for the better application of the six-ligament chiral structure. Several new six-ligament chiral structures with random and concentrated defects were designed to explore the effects of the defects on the in-plane dynamic properties. The structures were studied with the finite element ANSYS/LSDYNA numerical simulation and experimental methods. According to the defect-free six-ligament chiral structures exhibiting different deformation modes at different impact velocities, the effects of the defect rate and type (concentrated and random defects) on the six-ligament chiral structure, the in-plane impact deformation mode and energy absorption characteristics are discussed. The research results show that the defect rate and type reduce the energy absorption characteristics of the chiral structure to varying degrees, and the impact deformation mode also changes under medium- and low-speed impact. With the increase in speed, the influence of the defects on the deformation mode weakens. Moreover, the effects of the concentrated and random defects on the platform stress are different. When the defect rate is low, the effect of the random defects is more significant, and as the defect rate increases, the effect of the concentrated defects is more obvious. The study can provide guidance for structural design, predict the failure form of structures containing defects when they are impacted, and realize material recycling.

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