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Adaptive-Curvature Structures with Auxetic Materials
Advanced Materials Research, 2018Advancements in computational tools are offering designers the possibility to change their relationship with materials and establishing new synergies between matter, form and behaviour. This work explores this paradigm by introducing the use of auxetic metamaterials, specifically engineered to obtain properties beyond those found in nature, to generate
Naboni, Roberto +2 more
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Auxetics among Materials with Cubic Anisotropy
Mechanics of Solids, 2020The article provides a brief overview of studies on crystalline materials with negative Poisson’s ratio (crystalline auxetics) with cubic anisotropy. It has been demonstrated that 1/4 part of all cubic crystals has auxetic properties. Even more auxetics are found among chiral nano/microtubes with cubic cylindrical anisotropy.
V. A. Gorodtsov, D. S. Lisovenko
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Auxetic materials in design and architecture
Nature Reviews Materials, 2017Auxetic materials deform in an unusual way when stretched or compressed; they are flexible and adaptable, and, if made from responsive materials, can react to their environment. The opportunities they offer for innovative applications in fashion, design and architecture are just starting to be explored.
Athina Papadopoulou +2 more
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This report examines auxetic materials which are designed to have a negative Poisson’s ratio. Thismeans they expand sideways when stretched. This unusual behaviour provides unique mechanicaladvantages, such as better resistance to indentation, improved toughness against fractures, andbeneficial synclastic curvature, which aids in uniform bending.
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A Phase Transition Model Describing Auxetic Materials
2017In this paper we introduce a newmodel describing the behavior of auxetic materials in terms of a phase-field PDE system. More precisely, the evolution equations are recovered by a generalization of the principle of virtual power in which microscopic motions and forces, responsible for the phase transitions, are included. The momentum balance is written
Bonetti E., Fabrizio M., Fremond M.
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Auxeticity of cubic materials under pressure
physica status solidi (b), 2010AbstractThe global maximum and global minimum Poisson's ratio (PR) surfaces, regions of different auxetic behaviour and the domains of the different extreme directions of cubic materials are shown and discussed in terms of the elastic moduli ratios, $X = G/K,Y = G/W$, where K is the bulk modulus and $G,W$ are shear moduli.
A. C. Brańka +2 more
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Auxetic materials : general concepts
2013Auxetic materials are different from other conventional materials since they present a negative Poisson’s ratio. These materials present an unusual behavior: when stretched (elongated in the longitudinal direction), their cross-section is increased.
Steffens, F. +3 more
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Negative-Poisson's-Ratio Materials: Auxetic Solids
Annual Review of Materials Research, 2017Poisson's ratio had long been considered to be an intrinsic material property, confined within a narrow domain and governed solely by the geometry of interatomic bonds. Materials with designed heterogeneity allow for control over the Poisson's ratio.
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Micromechanical Models for Auxetic Materials
2014This chapter provides a survey of micromechanical models that seek to predict and explain auxetic behavior, based on re-entrant microstructures, nodule-fibril microstructure, 3D tethered-nodule model, rotating squares , rectangles, triangles and tetrahedrals models, hard cyclic hexamers model, missing rib models , chiral and anti-chiral models ...
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Damping in auxetic materials and structures.
The Journal of the Acoustical Society of America, 2010Negative Poisson’s ratio (NPR) (otherwise called auxetics) materials and structures feature enhanced energy absorption under cyclic loading both at low- and high-frequency excitations. We show in this paper experimental and simulation results related to open cell PU-PE foams, honeycombs, and composites, all exhibiting a negative Poisson’s ratio value ...
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