Results 61 to 70 of about 283,235 (345)

Golden‐Ratio–Guided Aperiodic Architected Metamaterials with Simultaneously Enhanced Strength and Toughness

Advanced Functional Materials, EarlyView.
Guided by the golden ratio, a class of aperiodic architected metamaterials is introduced to address the intrinsic trade‐off between strength and toughness. By unifying local geometric heterogeneity with global order, the golden‐ratio‐guided aperiodic architecture promotes spatial delocalization of damage tolerence regions, leading to more tortuous ...
Junjie Deng, Xinxin Wang, Ruochao Zhao, Zhendong Li, Kai Liu, Ke Yuan, Jia An, Xinwei Li, Chee Kai Chua, Zhonggang Wang   +9 more
wiley   +1 more source

Unusual Swelling Behavior of Hydrogels Modified with Spiropyran as Appendage or Crosslinker

Advanced Functional Materials, EarlyView.
Not so innocent after all—spiropyran crosslinkers in methylenebisacrylamide‐crosslinked poly(acrylamide‐co‐acrylic acid) hydrogels increase crosslinking density, but also, counterintuitively, increase swelling. Charge complexation, cooperative chemo‐mechanical effects, and aggregation may explain these observations.
Michael M. Lerch, Ankita Shastri, Thomas B. H. Schroeder, Amos Meeks, Shucong Li, Anna V. Shneidman, Michael Aizenberg, Joanna Aizenberg   +7 more
wiley   +1 more source

Cyclic shearing characteristics of calcareous sand-snake skin-inspired interfaces

Yantu gongcheng xuebao
In marine geotechnical engineering, the dynamic response of the calcareous sand-structure interfaces is critical to the overall stability of structures.
CUI Hao 1, 2 , LIU Hanlong 2, 3, XIAO Yang 2, 3
doaj   +1 more source

Damped finite-time-singularity driven by noise

, 2003
We consider the combined influence of linear damping and noise on a dynamical finite-time-singularity model for a single degree of freedom. We find that the noise effectively resolves the finite-time-singularity and replaces it by a first-passage-time or
A. Johansen, A.J. Bray, D. Sornette, D. Sornette, G. Falkovich, H.C. Fogedby, H.C. Fogedby, H.C. Fogedby, H.C. Fogedby, H.K. Janssen, Hans C. Fogedby, I. Cohen, J. Eggers, J. Eggers, J. Farago, K. Ide, M.C. Cross, M.P. Brenner, M.P. Brenner, M.P. Brenner, P. Constantin, P.C. Martin, R.M. Kerr, S. Gluzman   +23 more
core   +1 more source

Spectrally Tunable 2D Material‐Based Infrared Photodetectors for Intelligent Optoelectronics

Advanced Functional Materials, EarlyView.
Intelligent optoelectronics through spectral engineering of 2D material‐based infrared photodetectors. Abstract The evolution of intelligent optoelectronic systems is driven by artificial intelligence (AI). However, their practical realization hinges on the ability to dynamically capture and process optical signals across a broad infrared (IR) spectrum.
Junheon Ha, Yingshan Ma, Yong Nam An, Sung‐Un An, Hyeon Hak Jung, Suvi‐Tuuli Varjamo, Jiwon Yoo, Junho Min, Hanvit Kim, Faisal Ahmed, Sang Hoon Chae, Young Min Song, Weiwei Cai, Tawfique Hasan, Zhipei Sun, Dong‐Ho Kang, Hyeon‐Jin Shin, Yunyun Dai, Hoon Hahn Yoon   +18 more
wiley   +1 more source

Decomposition of process damping ratios and verification of process damping model for chatter vibration [PDF]

Measurement, 2012
In the previous study, by the same authors, titled ‘‘A new process damping model (PDM) for chatter vibration (Measurement, 44 (8) (2011) 1342–1348)’’, a new approach has been presented for obtaining process damping ratios (PDRs). This PDM has been constituted on the basis of the shear angle ðuÞ oscillations of the cutting tool and the alteration of the
Turkes, Erol, Orak, Sezan, Neseli, Suleyman, Yaldiz, Suleyman   +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

Studying The Feasibility Of Powder Composite For Mechanical Damping Purposes

Journal of Engineering and Sustainable Development, 2014
The present work is concerned with study some of the mechanical properties (Brinell hardness, Bending strength, Damping) for a metal matrix composite (Aluminum-powder).
Hassan H. Mahdi, Nasris M.Namer, Ahmed Kadhiam Jaliel   +2 more
doaj  

Material damping ratio from free-vibration method

Annals of Warsaw University of Life Sciences – SGGW. Land Reclamation, 2018
Abstract One important aspect of soil dynamics is attenuation or energy loses. This inherent dynamic property is essential in the analysis of soil behavior subjected to a dynamic load. Energy absorption in soils leads to the definition of an equivalent viscous damping ratio (D).
Katarzyna Gabryś, Emil Soból, Wojciech Sas, Alojzy Szymański   +3 more
openaire   +1 more source

Fractional robust control of ligthly damped systems [PDF]

, 2006
The article proposes a method to design a robust controller ensuring the damping ratio of a closed-loop control. The method uses a contour para-meterized by the damping ratio in the Nichols plane and the complex non-integer (or fractional)differentiation
Janat, Yaman, Lanusse, Patrick, Oustaloup, Alain, Pommier-Budinger, Valérie   +3 more
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