The influence of cell micro-structure on the in-plane dynamic crushing of honeycombs with negative Poisson’s ratio

Zhang, Xinchun; An, Liqiang; Ding, Haimin; Zhu, Xiao; El‐Rich, Marwan

doi:10.1177/1099636214554180

Cited by 122 publications

(82 citation statements)

References 37 publications

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“…Zhang et al [14] discussed the influences of different cell wall aspect ratios and cell-wall angles of auxetic re-entrant honeycombs, and confirmed that plateau stresses are related to impact velocities. Jin et al [15] systematically analyzed the dynamic properties and blast resistance of sandwich structure with auxetic re-entrant honeycomb cores under blast loading by using the LS-DYNA.…”

Section: Introductionmentioning

confidence: 96%

In-plane crashworthiness of re-entrant hierarchical honeycombs with negative Poisson’s ratio

Tan

et al. 2019

Composite Structures

145

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Both auxetic structures and hierarchical honeycombs are marked with lightweight and excellent mechanical properties. Here, we combine the characteristics of auxetic structures and hierarchical honeycombs, and propose two re-entrant hierarchical honeycombs constructed by replacing the cell walls of re-entrant honeycombs with regular hexagon substructure (RHH) and equilateral triangle substructure (RHT). The honeycombs are subjected to in-plane impact in order to investigate the crashworthiness by using the commercial software LS-DYNA. The plateau stress of RHH and RHT in x and y directions are derived by a two-scale method. The results from numerical simulation indicate that the specific energy absorption of RHT and RHH is improved by up to 292% and 105%. RHT and RHH improve the mean crushing force value by 298%, 108% respectively compared with the classic re-entrant honeycomb (RH) under quasi-static loading at stress plateau region. The RHT and RHH still have the characteristic of negative Poisson's ratio. Additionally, the parametric studies are further carried out to investigate the effects of impact velocities and relative densities on crashworthiness. All the findings of this study indicate that the proposed two hierarchical honeycombs exhibit an improved crushing performance, and RHT provides the highest energy absorption capacity among all specimens.

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Section: Introductionmentioning

confidence: 96%

In-plane crashworthiness of re-entrant hierarchical honeycombs with negative Poisson’s ratio

Tan

et al. 2019

Composite Structures

145

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“…Since Aluminum honeycomb has good mechanical properties, e.g. light weight, high strength, great rigidity, etc., and most studies employed it as the basic material [13,15–17,26], it was used as the material of honeycomb in our study. The main parameters were gotten from these references above, which consist of the density ρ=2700 kg/m3, elastic modulus E=70 GPa, Poisson’s ratio μ=0.3 and yield strength σY=130 MPa.…”

Section: Applied Modelsmentioning

confidence: 99%

“…Researches for their potential capacities have been conducting for decades. Various enhancements in terms of compression [12], impact response, energy absorption [13], shear stiffness [14], etc. have been achieved.…”

Section: Introductionmentioning

confidence: 99%

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Comparative study of the in-plane uniaxial and biaxial crushing of hexagonal, re-entrant, and mixed honeycombs

Gao

Yang

et al. 2018

Jnl of Sandwich Structures & Materials

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The in-plane uniaxial and biaxial crushing characteristics of three honeycombs were studied through explicit dynamic finite element analysis in this paper. Crushing models were created, with all square specimens (hexagonal, reentrant and mixed honeycombs) deliberately built in the same scale. The in-plane uniaxial compressive performances of cellular structures in terms of the deformation mode, plateau stress, energy absorption as well as the impact response were compared and discussed, respectively. In the same loading condition, these honeycombs exhibited distinct characteristics. After that, in-plane orthogonal biaxial crushing simulations were carried out. Deformation processes of honeycombs were analyzed and compared. Results illustrated that some deformation behaviors in the uniaxial crushing case still exist in the biaxial crushing analysis. Their deformation modes were drawn into deformation maps. Energy absorption research illustrated that the transverse shrinking property in the uniaxial crushing case was detrimental to the energy dissipation capacity of honeycomb in the biaxial crushing case. In addition, comparing with the hexagonal honeycomb, reentrant honeycomb with slightly thicker cell walls expressed weaker ability in specific energy dissipation.

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“…Following one-dimensional (1D) shock wave theory and combining experimental and numerical simulation, prior studies start from the microstructure perspectives in order to optimize the mechanical properties and energy absorption of cellular solids via topology structure design, gradient design, hierarchy design, and negative Poisson's ratio design. [17][18][19][20][21][22][23][24][25] However, existing studies of stress wave propagation characteristics in cellular solids are limited due to the complicated microstructures, and the results primarily focus on the qualitative analysis and few assessment calculations. Symonds 26 analyzed the roles of elastic deformation in structural dynamic response, and the results indicated that elastic waves reflected energy propagation characteristics and exerted vital influences on both the deformation mode and energy absorption capacity of honeycombs.…”

Section: Introductionmentioning

confidence: 99%

Assessment on speed and amplitude of elastic wave propagation in square-packed circular honeycombs

Zhang

Liu

2020

The Journal of Strain Analysis for Engineering Design

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In contrast to the dynamic response characteristics, few propagation characteristics of elastic waves have been described on cellular materials, to date. In view of the development trend of emerging metamaterials on multi-functional, detailed characterization of elastic wave in honeycombs becomes an important task in order to assess their performances. This study investigates the propagation characteristics of elastic wave in square-packed circular honeycombs through combining theoretical analysis and numerical simulation. We also establish a one-dimensional circular chain model to discuss the influence mechanism of impact velocities, material parameters, and structural parameters on the elastic wave propagation characteristics in square-packed circular honeycombs. The influence relations are quantified and a semi-empirical theoretical expression for assessing characterization is presented, which extends theory of elastic wave propagation speed from solid materials to square-packed circular honeycombs. The assessment equation fully describes the elastic wave propagation speed and stress amplitude variation with location during propagation in square-packed circular honeycombs, and the results are consistent with the experimental data from the literature. The findings herein are aimed at providing an assessment equation with simple form for engineering applications easily and providing theoretical basis for elastic wave control and multi-functional combination design of metamaterials.

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The influence of cell micro-structure on the in-plane dynamic crushing of honeycombs with negative Poisson’s ratio

Cited by 122 publications

References 37 publications

In-plane crashworthiness of re-entrant hierarchical honeycombs with negative Poisson’s ratio

In-plane crashworthiness of re-entrant hierarchical honeycombs with negative Poisson’s ratio

Comparative study of the in-plane uniaxial and biaxial crushing of hexagonal, re-entrant, and mixed honeycombs

Assessment on speed and amplitude of elastic wave propagation in square-packed circular honeycombs

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