Results 51 to 60 of about 10,466 (212)

Exploiting nonlinearities through geometric engineering to enhance the auxetic behaviour in re-entrant honeycomb metamaterials

Scientific Reports, 2023
Classical approaches to enhance auxeticity quite often involve exploring or designing newer architectures. In this work, simple geometrical features at the member level are engineered to exploit non-classical nonlinearities and improve the auxetic ...
Chetna Srivastava, Lalit Bhola, Vinyas Mahesh, P. J. Guruprasad, Nik Petrinic, Fabrizio Scarpa, Dineshkumar Harursampath, Sathiskumar A. Ponnusami   +7 more
doaj   +1 more source

Effect of Compressive Strain Rate on Auxetic Foam

Applied Sciences, 2021
Auxetic foams have previously been shown to have benefits including higher indentation resistance than their conventional counterparts, due to their negative Poisson’s ratio, making them better at resisting penetration by concentrated loads.
Olly Duncan, Nicolas Bailly, Tom Allen, Yvan Petit, Eric Wagnac, Andrew Alderson   +5 more
doaj   +1 more source

Elastic constants of 3-, 4- and 6-connected chiral and anti-chiral honeycombs subject to uniaxial in-plane loading [PDF]

, 2010
Finite Element models are developed for the in-plane linear elastic constants of a family of honeycombs comprising arrays of cylinders connected by ligaments. Honeycombs having cylinders with 3, 4 and 6 ligaments attached to them are considered, with two
Alderson, Andrew, Alderson, K.L., Attard, D., Evans, K.E., Gatt, R., Grima, J.N., Miller, W., Ravirala, N., Smith, C.W., Zied, K.   +9 more
core   +2 more sources

Quasi‐Static to Supersonic Energy Absorption of Nanoarchitected Tubulanes and Schwarzites

Advanced Functional Materials, EarlyView.
Nanoarchitected energy‐absorptive Tubulanes exhibit record energy absorption under quasi‐static conditions and exceptional inelastic energy dissipation under 750 m s−1 ballistics impact, with high performance spanning strain rates of 12 orders of magnitude.
Peter Serles, Alianna Maguire, Thomas Butruille, Jet Lem, Shuo Yang, Pedro Guerra Demingos, Sahar Choukir, Michel Haché, Boran Kumral, Katherine Jia, Charles Jia, Yu Zou, Chandra Veer Singh, Carlos M. Portela, Jun Lou, Pulickel M. Ajayan, Tobin Filleter   +16 more
wiley   +1 more source

Unraveling the reinforcing mechanisms for cementitious composites with 3D printed multidirectional auxetic lattices using X-ray computed tomography

Materials & Design
This study investigates the mechanical properties of cementitious composites with 3D-printed auxetic lattices, featuring negative Poisson’s ratios (auxetic behavior) in multiple directions.
Zhaozheng Meng, Yading Xu, Jinbao Xie, Wen Zhou, Rowin J.M. Bol, Qing-feng Liu, Branko Šavija   +6 more
doaj   +1 more source

A novel tubular structure with negative Poisson's ratio based on gyroid-type triply periodic minimal surfaces

Virtual and Physical Prototyping, 2023
A novel type of tubular structure with negative Poisson's ratio based on gyroid-type triply periodic minimal surfaces (TPMSs) is proposed in this study. This work is an attempt to design auxetic tubular structures based on TPMS.
Weiwei Wang, Yuan Jin, Yanru Mu, Minghua Zhang, Jianke Du   +4 more
doaj   +1 more source

From Clinic to Computation: Multiscale Bioengineering Strategies for Durable Biological Aortic Valve Replacements

Advanced Functional Materials, EarlyView.
Bioprosthetic aortic valves have revolutionized the treatment of aortic stenosis, but their durability is limited by structural valve deterioration (SVD). This review focuses on the pericardial tissue at the heart of these valves, examining how its mechanical properties and calcification drive fatigue and failure.
Gabriele Greco, Pierfrancesco Gaziano, Serena Anglese, Simone Morganti, Carlo de Vincentiis, Ferdinando Auricchio, Michele Marino, Michele Conti   +7 more
wiley   +1 more source

Auxeticity‐by‐Assembly: Interlocking Modular Auxetic Metamaterials with Selectively Activatable AgNW–Graphene Oxide‐EGaIn Composite Interconnects for Scalable Freeform Photovoltaic Modules

Advanced Functional Materials, EarlyView.
Auxeticity‑by‑Assembly converts freeform photovoltaics from cut‑defined layouts to assembly‑defined systems. Standardized interlocking units generate negative‑Poisson‑ratio, reconfigurable architectures, while hinge regions are wired by selectively activatable AgNW–GO@EGaIn composite interconnects and a folding‑enabled interconnector layer. A decimeter‑
Seok Joon Hwang, Jiwon Ryu, Dae‐Hee Cho, YoungHoi Cho, Yewon Hwang, Haram Lee, Dong Hoe Kim, Byeong‐Kwon Ju, Seok Chung, Deokjae Choi, Gee Yeong Kim, Heesuk Jung, Taehee Kim, Hyeonggeun Yu, Gabseok Seo, Phillip Lee   +15 more
wiley   +1 more source

A review on auxetic structures: Applications, properties, classifications, finite element analysis, manufacturing methods, and selective laser melting process parameters

Results in Engineering
Auxetic structures are a novel class of materials characterized by their unique internal geometric configuration at the micro/nano scale, resulting in unusual mechanical behavior.
Manikandan Periyasamy, N. Srinivasan
doaj   +1 more source

The structure response of sandwich beams with metallic auxetic honeycomb cores under localized impulsive loading-experiments and finite element analysis

Materials & Design, 2019
In recent years, auxetic cellular materials such as auxetic reentrant honeycombs were widely studied due to its attractively negative Poisson's ratio.
Dengbao Xiao, Xiaoqi Chen, Ying Li, Wenwang Wu, Daining Fang   +4 more
doaj   +1 more source