Results 11 to 20 of about 7,064 (232)
Progress of auxetic and semi-auxetic materials [PDF]
Engineering Review : Međunarodni časopis namijenjen publiciranju originalnih istraživanja s aspekta analize konstrukcija, materijala i novih tehnologija u području strojarstva, brodogradnje, temeljnih tehničkih znanosti, elektrotehnike, računarstva i građevinarstva, 2023 Auxetic materials with negative Poisson's ratios, display the unique behavior owing to their micro-structure or geometrical build. Auxetic materials resist deformities when subjected to uniaxial, biaxial, and shearing stresses. Cellular based materials are known for their excellent impact and shock energy absorption.
Pai, Anand +4 more
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Programmable Sequential 4D Actuation in Multistable Kirigami Metamaterials. [PDF]
Adv Sci (Weinh)This study presents a modular kirigami metamaterial framework enabling programmable multistability and sequential 4D actuation. By coupling geometry‐controlled multistability with material‐dependent recovery kinetics, spatiotemporal deformation can be precisely programmed.
Kim EH, Kim M, Yoon H, Park K.
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Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2015 We formulate a mathematical theory of auxetic behaviour based on one-parameter deformations of periodic frameworks. Our approach is purely geome- tric, relies on the evolution of the periodicity lattice and works in any dimension. We demonstrate its usefulness by predicting or recognizing, without experiment, computer simulations or numerical ...
Borcea, Ciprian, Streinu, Ileana
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Nanocomposites with auxetic nanotubes [PDF]
International Journal of Smart and Nano Materials, 2010 The effect of extreme and negative Poisson's ratio (auxetic) behavior from non-reconstructed defective (NRD) carbon nanotubes on the mechanical properties of nanocomposites is demonstrated. NRD carbon nanotubes (CNTs) produced by electronic or ion irradiation are metastable structures, which however can exist at low temperatures or when surrounded by ...
Scarpa, FL, Adhikari, S, C Y, Wang
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A perspective on auxetic nanomaterials [PDF]
Nano Convergence, 2017 Nanomaterials have recently been found to exhibit auxetic behavior, or a negative Poisson's ratio, whereby the lateral dimensions of the material expand, rather than shrink, in response to applied tensile loading. In this brief review, we use the form of question-answer to highlight key points and outstanding issues related to the field of auxetic ...
Park, Harold S., Kim, Sung Youb
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Investigating the Effects of Geometrical Parameters of Re-Entrant Cells of Aluminum 7075-T651 Auxetic Structures on Fatigue Life [PDF]
, 2023 In this study, the effects of two geometrical parameters of the re-entrant auxetic cells, namely, internal cell angle (θ) and H/L ratio in which H is the cell height, and L is the cell length, have been studied on the variations of Poisson’s ...
Amir Ghiasvand +13 more
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Molecular auxetic polymer of intrinsic microporosity via conformational switching of a cavitand crosslinker [PDF]
, 2023 Auxetics are materials characterized by a negative Poisson’s ratio (NPR), an uncommon mechanical behavior corresponding to a transversal deformation tendency opposite to the traditional materials.
Roberto, Brighenti +7 more
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Hierarchical Auxetic Mechanical Metamaterials [PDF]
Scientific Reports, 2015 AbstractAuxetic mechanical metamaterials are engineered systems that exhibit the unusual macroscopic property of a negative Poisson's ratio due to sub-unit structure rather than chemical composition. Although their unique behaviour makes them superior to conventional materials in many practical applications, they are limited in availability.
Gatt R. +7 more
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Hierarchical Fibers with a Negative Poisson’s Ratio for Tougher Composites [PDF]
, 2013 In this paper, a new kind of hierarchical tube with a negative Poisson’s ratio (NPR) is proposed. The first level tube is constructed by rolling up an auxetic hexagonal honeycomb.
Yongtao Sun +7 more
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Periodic Auxetics: Structure and Design [PDF]
The Quarterly Journal of Mechanics and Applied Mathematics, 2017 Materials science has adopted the term of auxetic behavior for structural deformations where stretching in some direction entails lateral widening, rather than lateral shrinking. Most studies, in the last three decades, have explored repetitive or cellular structures and used the notion of negative Poisson's ratio as the hallmark of auxetic behavior ...
Borcea, Ciprian S., Streinu, Ileana
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