The bending and failure of sandwich structures with auxetic gradient cellular cores

Hou, Yangqing; Tai, Y. H.; Lira, Cristian; Scarpa, Fabrizio; Yates, J. R.; Gu, Bohong

doi:10.1016/j.compositesa.2013.02.007

Cited by 145 publications

(63 citation statements)

References 30 publications

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“…Gradient auxetic cores have also been evaluated to engineer damage tolerant sandwich panels and static indentation [23]. Very recent work on the vibration of auxetic plates has also been performed by Maruszewski et al [24], and by Lim [25].…”

Section: Introductionmentioning

confidence: 99%

Vibroacoustic optimization of anti-tetrachiral and auxetic hexagonal sandwich panels with gradient geometry

Ranjbar¹,

Boldrin²,

Scarpa³

et al. 2016

Smart Mater. Struct.

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The work describes the vibroacoustic behavior of anti-tetrachiral and auxetic hexagonal gradient sandwich panels using homogenized finite element models to determine the mechanical properties of the auxetic structures, the natural frequencies and radiated sound power level of sandwich panels made by the auxetic cores. The mechanical properties and the vibroacoustic behavior of auxetic hexagonal sandwich panels are investigated as a benchmark. The radiated sound power level of the structure over the frequency range of 0 to 1000 Hz is minimized by modifying the core geometry of the gradient auxetic sandwich panels. Several excitation cases are considered. First-order and random optimization methods are used for the minimization of radiated sound power level of the structures. The results of this study present significant insights into the design of auxetic structures with respect to their vibroacoustical properties.

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Section: Introductionmentioning

confidence: 99%

Vibroacoustic optimization of anti-tetrachiral and auxetic hexagonal sandwich panels with gradient geometry

Ranjbar¹,

Boldrin²,

Scarpa³

et al. 2016

Smart Mater. Struct.

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“…Airoldi et al [17] studied the buckling and postbuckling responses of chiral honeycombs. Hou et al [18] analyzed the bending and failure behaviour of sandwich structures with auxetic honeycombs. The results above show that cell internal structure has a very significant effect on the macro/micromechanical properties of auxetic honeycombs [7,10,11,16].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on Dynamic Crushing Behavior of Auxetic Honeycombs with Various Cell-Wall Angles

Zhang

Ding

et al. 2014

Advances in Mechanical Engineering

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Auxetic honeycombs have proven to be an attractive advantage in actual engineering applications owing to their unique mechanical characteristic and better energy absorption ability. The in-plane dynamic crushing behaviors of the honeycombs with various cellwall angles are studied by means of explicit dynamic finite element simulation. The influences of the cell-wall angle, the impact velocity, and the edge thickness on the macro/microdeformation behaviors, the plateau stresses, and the specific energy absorption of auxetic honeycombs are discussed in detail. Numerical results show, that except for the impact velocity and the edge thickness, the in-plane dynamic performances of auxetic honeycombs also rely on the cell-wall angle. The "> <"-mode local deformation bands form under low-or moderate-velocity impacting, which results in lateral compression shrinkage and shows negative Poisson's ratio during the crushing. For the given impact velocity, the plateau stress at the proximal end and the energy-absorbed ability can be improved by increasing the negative cell angle, the relative density, the impact velocity, and the matrix material strength. When the microcell parameters are the constant, the plateau stresses are proportional to the square of impact velocity.

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“…Alongside with low propensity to crack propagation, more energy is required to expand them than conventional materials [117]. Both theoretical and experimental methods were used to evaluate the mechanisms of such special properties [91,92,100,116,117,119,120]. However, due to the irregular and complex microstructure of NPR materials, especially foams, slight differences in fabrication methods and conditions may cause fluctuating mechanical performances [4].…”

Section: Toughnessmentioning

confidence: 99%

Mechanics of Advanced Materials

Silberschmidt¹,

Матвеенко²

2015

Engineering Materials

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The bending and failure of sandwich structures with auxetic gradient cellular cores

Cited by 145 publications

References 30 publications

Vibroacoustic optimization of anti-tetrachiral and auxetic hexagonal sandwich panels with gradient geometry

Vibroacoustic optimization of anti-tetrachiral and auxetic hexagonal sandwich panels with gradient geometry

Numerical Investigation on Dynamic Crushing Behavior of Auxetic Honeycombs with Various Cell-Wall Angles

Mechanics of Advanced Materials

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