Auxetics and Other Systems with “Negative” Characteristics

Wojciechowski, Krzysztof W.; Alderson, Andrew; Grima, Joseph N.; Scarpa, Fabrizio

doi:10.1002/pssb.202000496

Cited by 12 publications

(9 citation statements)

References 29 publications

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“…7–10 Recently, the discovery of NPRs in metal nanowires and carbon nanotubes has been reported. 11,12 In the study of two dimensional (2D) materials, like the representative graphene, a NPR was discovered in 2D materials with specific engineering, such as introducing vacancy defects, 13 creating periodic pores, 14 cutting into nanoribbons, 15 etc. In addition, an intrinsic in-plane NPR has been found in 2D materials when applying strain along a special direction without any external modification of the structure, shape or composition.…”

Section: Introductionmentioning

confidence: 99%

The consistent behavior of negative Poisson's ratio with interlayer interactions

Wang

Zhang

et al. 2022

Mater. Adv.

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Section: Introductionmentioning

confidence: 99%

The consistent behavior of negative Poisson's ratio with interlayer interactions

Wang

Zhang

et al. 2022

Mater. Adv.

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“…Since then, many scientific papers and reviews presenting the properties and advantages of auxetics in relation to ordinary (positive Poisson's ratio) materials have been published. It should be mentioned the work edited by Wojciechowski et al (2020), reviews by Lakes (2017), Lim (2017), Yu et al (2018) as well as the book by Lim (2015), where references to various review articles, thematic issues and original publications on auxetic and corresponding systems can be found. The works mentioned above made it possible to design and manufacture, from materials of biological origin, pyramidal cores with auxetic properties (Maslej and Smardzewski 2019).…”

Section: Introductionmentioning

confidence: 99%

Compression and low velocity impact response of wood-based sandwich panels with auxetic lattice core

2021

Self Cite

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The research determined the resistance to compression and low velocity impact of wood-based sandwich panels, the face sheet made of high-density fiber board, and high pressure laminate, while its auxetic lattice core was made by 3D printing using LayWood bio-composite filament. The core's auxetic property (i.e. exhibiting negative Poisson's ratio) was observed within the planes parallel to the facings. The ability of particular types of multilayer panels to absorb the energy was also determined. Based on the analysis of the obtained test results, it was proven that the core denoted as B, with inclination angle of the cell ribs $${{\varphi }_{x}=\varphi }_{y}=65^\circ$$ φ x = φ y = 65 ∘ , shows the highest compressive strength. It was determined that the dynamic load causes a very high overload in high-density fiber board face sheets. This results in damage to the sandwich panel surface and core structure. Cells of type B favorably minimize the differences in absorbed energy when using different face sheets and the energy value for low velocity impact. Taking into account the amount of absorbed energy, the most attractive is the panel with the D-type orthotropic core characterized by an inclination angle of the cell ribs $${\varphi }_{x}= 30^\circ , {\varphi }_{y}=60^\circ$$ φ x = 30 ∘ , φ y = 60 ∘ . The amount of energy absorbed by samples with high-density fiberboard face sheets increases significantly depending on the impactor's energy. For panels with face sheets manufactured from high-pressure laminate, the amount of energy absorbed decreases.

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“…Today, many 2D and 3D auxetic structures have been discovered or proposed either in natural materials or in man-made materials. [13][14][15][16] Auxetic structures can be fabricated by 3D printing. [17] Some of them can also be realized by textile technologies.…”

Section: Introductionmentioning

confidence: 99%

Deformation Behaviors of Auxetic Warp Knitted Fabrics Based on Reentrant Geometry

Zhao

Chang

Yang

et al. 2021

Physica Status Solidi (b)

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A series of auxetic warp knitted fabrics based on reentrant geometry were developed in our previous study and their Poisson's ratio in the wale direction and course direction can be as low as −0.5 and −0.15, respectively. However, the quantitative relationships between structural parameters and auxetic effect, which can offer a guide to the design and manufacture process, are still unknown. Herein, the aim is to find such relationships. Based on the geometrical analysis, two semiempirical equations between Poisson's ratio and tensile strain are established when stretched in the wale direction and course direction, respectively. The study shows that the established semiempirical equations fit well with experimental results and can be used to predict auxetic effect of fabrics made with the same type of materials and similar structures. With the relationships proposed, warp knitted fabrics can be designed and manufactured directly without trials to obtain the desired auxetic effect, which can largely save the time and cost of production.

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Auxetics and Other Systems with “Negative” Characteristics

Cited by 12 publications

References 29 publications

The consistent behavior of negative Poisson's ratio with interlayer interactions

The consistent behavior of negative Poisson's ratio with interlayer interactions

Compression and low velocity impact response of wood-based sandwich panels with auxetic lattice core

Deformation Behaviors of Auxetic Warp Knitted Fabrics Based on Reentrant Geometry

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