Book ChapterDOI
Flexural Behaviour of Auxetic Core Sandwich Beam
Ruby Vaguez,Simon Jayasingh +1 more
- pp 71-82
TLDR
In this article, a 3D unit cell was numerically modelled to evaluate the auxetic behaviour, and parametric analysis was done to evaluate performance of different designs of unit cell, and it was compared with the equivalent monolithic one.Abstract:
Auxetic is a material or a structure which has gained popularity due to its enhanced properties; they are widely used in the field of biomedical, aerospace, automotive, military and textile industry. They exhibit negative Poisson’s ratio, that is, unlike unconventional materials, they become wider when uniaxially stretched and thinner when uniaxially compressed. They exhibit enhancement in physical properties like vibration absorption, shear resistance, indentation resistance, fracture resistance and lower fatigue crack propagation. In this paper, a 3D unit cell was numerically modelled to evaluate the auxetic behaviour, and parametric analysis was done to evaluate the performance of different designs of unit cell, and it was compared with the equivalent monolithic one. Various design parameters considered were the height of the vertical connecting strut and the centre and radius of the curved strut of the core. It was found that a curved strut core shows auxetic behaviour, and as the distance of the centre of the curved strut increases, the deflection of the unit cell increased. This 3D unit cell was then numerically modelled to sandwich beam with auxetic core subjected to three-point bending. The behaviour of the structure was studied numerically using Abaqus/CAE 6.14.read more
Citations
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Journal ArticleDOI
Revolutionizing Prosthetic Design with Auxetic Metamaterials and Structures: A Review of Mechanical Properties and Limitations
TL;DR: A review of the current state of the art in the development of prosthetics using auxetic metamaterials can be found in this article , where the authors discuss the mechanical properties of these materials, including their negative Poisson's ratio and other properties that make them suitable for use in prosthetic devices.
Journal ArticleDOI
An investigation on flexural properties of anti-tetrachiral auxetic structures fabricated by material extrusion
Soham Teraiya,Shailendra Kumar +1 more
TL;DR: In this article , the authors investigated the influence of two geometric parameters namely cylinder radius and ligament thickness on modulus, strength and specific energy absorption (SEA) of in-plane and out-of-plane oriented structures under flexural loading.
References
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Journal ArticleDOI
Blast resistance of auxetic and honeycomb sandwich panels: Comparisons and parametric designs
TL;DR: In this paper, the authors compared composite sandwich panels composed of auxetic and conventional honeycomb cores and metal facets and compared for their resistance performances against impulsive loadings, taking into account the rate-dependent effects.
Journal ArticleDOI
A Numerical Study of Auxetic Composite Panels under Blast Loadings
TL;DR: In this paper, the performance of composite panels composed of auxetic cellular cores and metal facets for blast resistance applications is numerically studied, taking into account the rate-dependent effects.
Journal ArticleDOI
Bending behavior of sandwich composite structures with tunable 3D-printed core materials
Tiantian Li,Lifeng Wang +1 more
TL;DR: In this paper, the authors combine 3D printing technique, numerical analysis, and experiments to design a new class of sandwich composites that exhibit various bending behaviors, including truss, conventional honeycomb, and re-entrant honeycomb topologies.
Journal ArticleDOI
Three-dimensional modelling of auxetic sandwich panels for localised impact resistance:
TL;DR: In this paper, the performance of composite panels with auxetic lattice cores confined between metallic facets for localised impact resistance applications is numerically studied, considering the rate-dependent effects.
Journal ArticleDOI
Analysis of elastic modulus of conventional foams and of re-entrant foam materials with a negative Poisson's ratio
J.B Choi,Roderic S. Lakes +1 more
TL;DR: In this paper, Young's modulus of conventional and re-entrant open cell foams are obtained by modeling the three-dimensional unit cell as an idealized 14-sided unit cell.
Related Papers (5)
Plastic failure analysis of an auxetic foam or inverted strut lattice under longitudinal and shear loads
Mulalo Doyoyo,Jong Wan Hu +1 more