Results 41 to 50 of about 10,466 (212)

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
openaire   +4 more sources

Topological characteristics and mechanical properties of uniaxially thermoformed auxetic foam

Materials & Design, 2021
We present here a simplified procedure to manufacture auxetic PU foam via a single direction thermoforming compression process applied to conventional (pristine) open cell foam samples.
Qicheng Zhang, Wenjiang Lu, Fabrizio Scarpa, David Barton, Kathryn Rankin, Yunpeng Zhu, Zi-Qiang Lang, Hua-Xin Peng   +7 more
doaj   +1 more source

Disordered auxetic metamaterials architected by random peanut-shaped perturbations

Materials & Design, 2021
Previous discussions about perforated auxetic metamaterials primarily focused on the ordered systems with high degree of geometric symmetry. However, it is difficult to manufacture or retain the perfect auxetic systems in practical applications.
Hui Wang, Sihang Xiao, Jianshan Wang
doaj   +1 more source

Compliant rolling-contact architected materials for shape reconfigurability. [PDF]

, 2018
Architected materials can achieve impressive shape-changing capabilities according to how their microarchitecture is engineered. Here we introduce an approach for dramatically advancing such capabilities by utilizing wrapped flexure straps to guide the ...
Chizari, Samira, Dotson, Matthew, Hopkins, Jonathan B, Shaw, Lucas A, Song, Yuanping   +4 more
core   +2 more sources

Towards Polymers with Molecular Auxeticity [PDF]

CHIMIA, 2019
Abstract: For many decades, it has been challenging to synthesize auxetic materials at the molecular level. Auxetic materials exhibit counterintuitive behavior; they expand perpendicularly to the direction in which they are stretched. An aromatic macrocycle containing a sequence of N-substituted and N-unsubstituted amides was designed to ...
Alizadeh, Mahshid, Tennie, Iris K., Steiner, Ullrich, Kilbinger, Andreas F. M.   +3 more
openaire   +4 more sources

Geometry‐Dependent Adhesion in Transparent Monodomain Liquid Crystal Elastomers

Advanced Functional Materials, EarlyView.
Liquid Crystal Elastomers (LCEs) are emerging as exciting pressure‐sensitive adhesives. We examine adhesion in chemically identical elastomer films, exploring the influence of geometry (director orientation) and phase (nematic or isotropic). We demonstrate the potential of these aligned films as transparent, tunable, broad‐temperature‐range smart ...
Aidan Street, Devesh Mistry, Johan Mattsson, Helen F. Gleeson   +3 more
wiley   +1 more source

Pressure-Reducing Design of 3D-Printed Diabetic Shoe Midsole Utilizing Auxetic Lattice Structure

Applied Sciences
With the global rise in the prevalence of diabetes, diabetic patients need innovative footwear designs to reduce the risk of foot ulcers. This study examined the mechanical properties of diabetic shoe midsoles featuring auxetic lattice structures ...
Jifa Zhang, Shizhu Lu, Yinyin Lin, Yang Wang, Xiaolie Yi, Wencheng Fang   +5 more
doaj   +1 more source

Beyond developable: computational design and fabrication with auxetic materials [PDF]

, 2016
We present a computational method for interactive 3D design and rationalization of surfaces via auxetic materials, i.e., flat flexible material that can stretch uniformly up to a certain extent. A key motivation for studying such material is that one can
Bouaziz, Sofien, Crane, Keenan, Deng, Bailin, Konaković, Mina, Pauly, Mark, Piker, Daniel   +5 more
core   +3 more sources

Meta‐Rod Mechanical Metamaterials With Programmable Reconfiguration

Advanced Functional Materials, EarlyView.
Existing mechanical metamaterials achieve programmable large deformations in planar square or cubic configurations, restricted by required complex boundary conditions. This research proposes a 1D metamaterial, Meta‐rod, with linear, bending, twisting, area, and volume deformation modes.
Atharva Pande, Lyes Kadem, Hang Xu
wiley   +1 more source

Efficacy of auxetic lattice structured shoe sole in advancing footwear comfort—From the perspective of plantar pressure and contact area

Frontiers in Public Health
IntroductionDesigning footwear for comfort is vital for preventing foot injuries and promoting foot health. This study explores the impact of auxetic structured shoe soles on plantar biomechanics and comfort, motivated by the integration of 3D printing ...
Jifa Zhang, Shizhu Lu, Yadie Yang, Yiwen Liu, Yuqing Guo, Hongrui Wang   +5 more
doaj   +1 more source