Novel honeycombs with auxetic behaviour

Gaspar, N.; Ren, Xuejun; Smith, Christopher W.; Grima, Joseph N.; Evans, K.

doi:10.1016/j.actamat.2005.02.006

Cited by 237 publications

(150 citation statements)

References 7 publications

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“…Researchers have studied the hardness properties of many of the synthetic auxetic materials produced to date, and enhancements have been found across the board in materials such as polymeric and metallic foams [10,11], carbon fiber composite laminates [12], and micro porous polymers [13,14]. Alderson et al [15,16] studied the hardness of polyethylene and Ultra High Molecular Weight Polyethylene (UHMWPE) with a negative Poisson's ratio and found that the presence of a negative Poisson's ratio resulted in enhancements of the hardness by up to a factor of 2 over conventional UHMWPE.…”

Section: Properties Of Auxetic Materialsmentioning

confidence: 99%

Engineered Warp Knit Auxetic Fabrics

Ugbolue¹,

Kim²,

Warner³

et al. 2012

J Textile Sci Engg

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Section: Properties Of Auxetic Materialsmentioning

confidence: 99%

Engineered Warp Knit Auxetic Fabrics

Ugbolue¹,

Kim²,

Warner³

et al. 2012

J Textile Sci Engg

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“…It has been known to be theoretically possible since Love [7]. Auxetic behaviour has been observed in both naturally occurring and synthetic materials [8][9][10][11][12][13] and may provide many benefits over conventional positive Poisson's ratio behaviour, such as increased shear stiffness, synclastic curvature, increased fracture toughness and enhanced indentation resistance [5 and Scarpa [15]. Interestingly there are signs that auxetic materials may have advantages over conventional equivalents in damping applications [15].…”

Section: Introductionmentioning

confidence: 99%

“…It is therefore conceivable that composites of this nature could be manufactured commercially without the need for developing new manufacturing techniques. Auxetics are known to have many realised and potential benefits over positive Poisson's ratio equivalents [6][7][8][9][10][11][12] but these low modulus examples may be especially useful for damping applications [15], particularly in aerospace or automotive roles.…”

Section: Introductionmentioning

confidence: 99%

The manufacture and characterisation of a novel, low modulus, negative Poisson’s ratio composite

Miller¹,

Hook²,

Smith³

et al. 2009

Composites Science and Technology

183

144

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Abstract.Relatively few negative Poisson's ratio (auxetic) composites have been manufactured and characterised and none with inherently auxetic phases. This paper presents the use of a novel double helix yarn that is shown to be auxetic, and an auxetic composite made from this yarn in a woven textile structure. This is the first reported composite to exhibit auxetic behaviour using inherently auxetic yarns. Importantly, both the yarn and the composite are produced using standard manufacturing techniques and are therefore potentially useful in a wide range of engineering applications.

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“…In this paper, we study the wave propagation behaviors of a kind of lattice structures with zigzag arms [22,23]. Such structures can generate complete bandgaps in a wide porosity range even when the porosity is very small.…”

Section: Introductionmentioning

confidence: 99%

Bandgaps and directional propagation of elastic waves in 2D square zigzag lattice structures

Wang

Zhang

2014

J. Phys. D: Appl. Phys.

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In this paper we propose some kinds of two-dimensional square zigzag lattice structures and study their bandgaps and directional propagation of elastic waves. The band structures and the transmission spectra of the systems are calculated by using the finite element method. The effects of the geometry parameters of the 2d-zigzag lattices on the bandgaps are investigated and discussed.The mechanism of the bandgap generation is analyzed by studying the vibration modes at the bandgap edges. Multiple wide complete bandgaps are found in a wide porosity range owing to the separation of the degeneracy by introducing bending arms. The bandgaps are sensitive to the geometry parameters of the systems. The deformed displacement fields of the transient response of finite structures subjected to harmonic loads are presented to show the directional wave propagation.The research work in this paper is relevant to the practical design of cellular structures with enhanced vibro-acoustics performance.

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Novel honeycombs with auxetic behaviour

Cited by 237 publications

References 7 publications

Engineered Warp Knit Auxetic Fabrics

Engineered Warp Knit Auxetic Fabrics

The manufacture and characterisation of a novel, low modulus, negative Poisson’s ratio composite

Bandgaps and directional propagation of elastic waves in 2D square zigzag lattice structures

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