Results 91 to 100 of about 351 (212)

Absorption of Broadband Low‐Frequency Sound Beyond the Thermodynamics Limit: An Acoustic Resonator With Magnetic Bearing

Advanced Science, EarlyView.
This work presents a magnetic‐bearing acoustic resonator that overcomes the thermodynamics limit of sound absorption. By introducing tunable negative stiffness, it achieves broadband low‐frequency absorption within a compact cavity, far exceeding the performance achievable by classic mass‐tuned designs.
Ying Hu, Zhe Zhang, Bohua Huang, Xue Han, Hallam Bastin Kilcoyne, Lixi Huang   +5 more
wiley   +1 more source

Introducing the inverted pendulum as a negative stiffness mechanism and a novel structural system to improve seismic performance using a quasi-zero stiffness approach

Scientific Reports
Earthquakes are significant factors contributing to the damage and failure of structures. Seismic isolators are one of the effective solutions for mitigating the impact of earthquakes.
Abdallah Azizi, Majid Barghian
doaj   +1 more source

Isomeric Ag14 Nanoclusters With Distinct Photophysical and Nanomechanical Properties

Advanced Science, EarlyView.
Ligand‐shell isomerism in atomically precise Ag14 nanoclusters is demonstrated to regulate core distortion, photoluminescence, and mechanical properties. Subtle changes in phosphine ligand arrangement drive a pronounced emission shift from green to red and alter crystal rigidity, revealing a direct structure‐property correlation that offers new design ...
Vivek Yadav, Arijit Jana, Maya Khatun, Harshita Nagar, Sergei Lebedkin, Amit Mondal, Swetashree Acharya, Sami Malola, Sudhadevi Antharjanam, Moses Egor, Pijush Ghosh, Tomas Base, Manfred Kappes, Hannu Häkkinen, Thalappil Pradeep   +14 more
wiley   +1 more source

Metamaterial springs for low-frequency vibration isolation

Journal of Materiomics
Metadevices have emerged as a new element or system in recent years, from optics to mechanical science, showing superior performance and powerful application potential.
Wenlong Liu, Lingling Wu, Junming Zhang, Jingbo Sun, Ji Zhou   +4 more
doaj   +1 more source

From Folding Mechanics to Robotic Function: A Unified Modeling Framework for Compliant Origami

Advanced Science, EarlyView.
A geometry‐consistent DDG framework captures compliant origami deformation from rigid‐like folding to soft panel bending. By tuning crease and panel stiffness, bistable snap‐through responses transform into smooth monostable deformation, enabling programmable stability and robot‐scale locomotion.
Bohan Zhang, Bo Wang, Huajiang Ouyang, Zhigang Wu, Haohao Bi, Jiawei Xu, Mingchao Liu, Weicheng Huang   +7 more
wiley   +1 more source

Excellent vibration isolation properties of a curved Euler beam QZS isolator: Simulation and experiment

Advances in Mechanical Engineering
In this study, a novel curved Euler beam quasi-zero stiffness (CE-QZS) isolator is proposed by limiting the displacement of the curved Euler beam to change its deformation mode, and the excellent vibration isolation properties are presented.
Xiaoqiang Chong, Zhijing Wu
doaj   +1 more source

Surface and Interfacial Engineering toward Durable Mechanically Coupled Flexible Electronics

Advanced Science, EarlyView.
This Review highlights how surface and interfacial engineering governs the reliability, durability, and functional stability of mechanically coupled flexible electronics. By integrating fundamental interfacial theory, failure mechanisms, multiscale engineering strategies, and representative applications, it provides a design‐oriented framework for ...
Qian Wang, Fangfang Dai, Wei Wu
wiley   +1 more source

Design and verification of energy balance actuation system for fishbone morphing wings

工程科学学报
Morphing wings can improve the aerodynamic performance of aircraft and expand their flight envelope. Elastic deformation of the morphing structure can enable continuous and smooth shape changes of the morphing aircraft, which is important in morphing ...
Yan ZHAO, Chen WANG, Ziyi HE, Jixu CAI, Yu ZHANG, Xing SHEN, Jiaying ZHANG   +6 more
doaj   +1 more source

Bistability-Enabled Quasi-Zero Stiffness for Low-Frequency Vibration Isolation

Results in Engineering
Low-frequency vibrations (5–25 Hz) dominate the energy content of electromechanical equipment and are a primary cause of performance degradation and failure. Conventional linear isolators face an inherent trade-off between achieving a low isolation onset frequency and maintaining high static load capacity. A quasi-zero-stiffness (QZS) isolator based on
Dai Yu, Wangqiang Xiao, Xuesheng Zhang, Zhiqin Cai   +3 more
openaire   +1 more source

Maximizing the Energy Output of Soft Electrohydraulic Generators

Advanced Science, EarlyView.
Many energy resources cannot be viably harvested with electromagnetic generators. This article evaluates the potential of soft electrohydraulic generators as an alternative approach for energy capture. An analytical model charts their operational limits and a rigorous experimental study results in new performance benchmarks with maximum specific energy
Sophie Kirkman, Ingemar Schmidt, Lawrence T. Smith, Steven L. Zhang, Shane K. Mitchell, Soo Jin Adrian Koh, Philipp Rothemund, Christoph Keplinger   +7 more
wiley   +1 more source