Results 81 to 90 of about 947,691 (244)

Analysis of Elastohydrodynamic Lubrication for Steel-polymer Spur Gear Pairs

Jixie chuandong
Polymer gears have the advantages of good self-lubrication and low production cost. Polymer gears are susceptible to pitting failure in transmission due to load, lubrication, etc. Metal-polymer gears' pairs have a longer service life than polymer-polymer
Zhou Jia'ao, Liu Xiaoling, Li Qun, Zhang Zheng   +3 more
doaj  

Self‐Powered All‐in‐One Wearable Bioelectronics Driven by Pneumatic Energy Buffering of Daily Footsteps

Advanced Science, EarlyView.
A pneumatic energy‐buffering strategy transforms transient and intermittent footsteps into quasi‐continuous electrical energy for a self‐powered wearable biosensing platform. The footwear‐integrated air‐pumping harvester, combined with the rationally designed power‐management system, powers a wearable ankle PPG device with reduced motion artifacts ...
Ji‐Seok Kim, Tae Woog Kang, Hyunjoon Yoo, Jawon Ha, Yunuo Huang, Hee Han, Chi Won Ahn, Woon‐Hong Yeo, Il‐Kwon Oh   +8 more
wiley   +1 more source

Additive Manufacturing of High‐Performance Polymers for Extreme Environments

Advanced Science, EarlyView.
Additive manufacturing of high‐performance polymers for extreme environments is critically reviewed through an integrated chemistry‐processing‐structure‐property‐qualification framework. The review compares fused filament fabrication, selective laser sintering, and direct ink writing, linking rheology and thermal history to crystallization, defect ...
Md Tofazzal Hossain, Mohammed Intishar Nur, Md Shajedul Hoque Thakur, Indranil Dey, Md Mesbahul Maruf, Md Jahid Hasan, Suryasarathi Bose, Muhammad M. Rahman   +7 more
wiley   +1 more source

A Thickness‐Invariant Origami Robot With Integrated Actuation and Multimodal Locomotion

Advanced Science, EarlyView.
A thickness‐invariant variation on the Yoshimura origami pattern is used as the basis of a robot, allowing power, actuation, and control systems to be embedded within the thickened panels of the pattern. The robot uses multiple kinematic branches to achieve distinct modes of locomotion, such as walking, running, galloping, and turning. ABSTRACT Origami
Davis Wing, Sam Bridge, William Bowler, Nathan Usevitch, Larry Howell   +4 more
wiley   +1 more source

Ultrahigh Interfacial Thermal Conductance across GaN/BAs Interfaces via Atomic‐Level Engineering

Advanced Science, EarlyView.
The integration of gallium nitride (GaN) with ultrahigh‐thermal‐conductivity boron arsenide (BAs) substrates represents a promising pathway for developing next‐generation high‐power devices. The heat dissipation capability of such integrated systems is fundamentally governed by thermal transport across GaN/BAs interfaces, and buffer layers such as ...
Linfeng Yu, Hongkai Zhang, Haofeng Qin, Yi Zhang, Jinyuan Xu, Yiming Zhao, Dongliang Ding, Jianbin Xu, Sunmi Shin, Zhuhua Zhang, Guangzhao Qin   +10 more
wiley   +1 more source

Effect of Nano TiO2–SiO2 Reinforcement on the Performance of HDPE Spur Gears

Journal of Mechanical Engineering
Gear design and analysis are fundamental aspects of mechanical engineering, particularly due to their extensive applications in industries such as automotive, aerospace, and marine.
Ramanjaneyulu Siripurapu, Murthy Battula Suryanarayana, Rao Mallipudi Srinivasa   +2 more
doaj   +1 more source

Material Compressing Test of the High Polymer Part Used in Draft Gear of Heavy Load Locomotive

MATEC Web of Conferences, 2016
According to the actual load cases of heavy load locomotive, the material compressing tests of the high polymer parts used in the locomotive are researched.
Wei Yangang, Zhang Wang, Song Yaxin, Zhu Fayuan   +3 more
doaj   +1 more source

Programmable Information Processing With Reconfigurable Self‐Contact Variable Stiffness Mechanical Metamaterial

Advanced Science, EarlyView.
Reconfigurable self‐contact variable stiffness metamaterials based on shape memory polymers enable programmable stiffness switching. Static arrays store and encrypt information with immunity to electromagnetic interference, while asymmetric stiffness converts symmetric vibration into directional matter transport.
Huadong Qin, Wenyu Zhu, Xin Wang, Cheng Shen, Li Cheng, Tian Jian Lu, Terence Xiaoteng Liu, Han Meng   +7 more
wiley   +1 more source

Effect of the operating temperature on thermal EHL performance of steel-POM gears

Jixie chuandong
ObjectiveThe temperature significantly influences the elastic modulus of polymer gears, which consequently affects their elastohydrodynamic lubrication performance.
ZHOU Jia’ao, LIU Xiaoling, ZHANG Zheng, LI Qun   +3 more
doaj  

Observations of acoustic emission activity during gear defect diagnosis. [PDF]

, 2003
It is widely recognised that acoustic emission (AE) is gaining ground as a non- destructive technique (NDT) for health diagnosis on rotating machinery.
Mba, David, Tim Toutountzakis, David Mba, Toutountzakis, Tim   +3 more
core   +1 more source