Results 71 to 80 of about 459,184 (233)

Testing the assumption of linear dependence between the rolling friction torque and normal force

MATEC Web of Conferences, 2017
Rolling friction is present in all nonconforming bodies in contact. A permanent topic is the characterization of the moment of rolling friction. A number of authors accept the hypothesis of linear dependency between the rolling torque and the normal ...
Alaci Stelian, Irimescu Luminita, Popescu Marian-Adrian, Fodorcan Daniel, Amarandei Dumitru, Ciornei Florina-Carmen   +5 more
doaj   +1 more source

Autonomous Navigation of Pollen‐Inspired Magnetic Microrobots for Biomedical Applications

Advanced Robotics Research, EarlyView.
A sunflower pollen‐inspired magnetic microrobot enables controlled rolling navigation in vessel‐like environments. Its open geometry reduces hydrodynamic drag, while vision‐based closed‐loop control, shortest‐path planning, and reinforcement learning support target‐reaching and maze navigation with microrobot‐scale accuracy, highlighting a route toward
Ali Anil Demircali, Abdurrahim Yilmaz, Meysam Keshavarz, Jinshi Zhao, Ara Darzi, Eric Yeatman, Burak Temelkuran   +6 more
wiley   +1 more source

Predicting the Coefficient of Friction in Rolling Contact Between 100Cr6 Bearing Steel Discs Using Machine Learning—Applications Within Industry 4.0/5.0

Applied Sciences
The digital transformation of manufacturing associated with Industry 4.0 and the human-centric paradigm of Industry 5.0 requires advanced predictive tools that can improve the performance, reliability, and sustainability of tribological systems.
Izabela Rojek, Janusz Musiał, Katarzyna Zasińska, Dariusz Mikołajewski   +3 more
doaj   +1 more source

Stiffness‐Programmable Origami Robots With Tendon‐Driven Actuation via Multimaterial 3D Printing

Advanced Robotics Research, EarlyView.
Motion diversity is achieved in a tendon‐driven origami robot through programmable stiffness rather than modified actuation. Multimaterial 3D printing embeds soft creases, modular inserts redirect identical tendon inputs into distinct behaviors, and variable‐stiffness inserts enable real‐time switching.
Elisha Lerner, Jianguo Zhao
wiley   +1 more source

Flexible Sensors for Robotics Tactile Perception: A Review

Advanced Robotics Research, EarlyView.
Flexible tactile sensing for robotics is reviewed through four interconnected dimensions. Physical mechanisms include piezoresistive, capacitive, piezoelectric, triboelectric, iontronic, and optical sensing. Structural design includes bioinspired, defect‐based, and MEMS‐based tactile systems.
Yu Song, Ying Chen, Yihao Chen, Xue Feng
wiley   +1 more source

Acquisition of molecular rolling lubrication by self-curling of graphite nanosheet at cryogenic temperature

Nature Communications
Friction as a fundamental physical phenomenon dominates nature and human civilization, among which the achievement of molecular rolling lubrication is desired to bring another breakthrough, like the macroscale design of wheel.
Panpan Li, Wenhao He, Pengfei Ju, Li Ji, Xiaohong Liu, Fan Wu, Zhibin Lu, Hongxuan Li, Lei Chen, Jingzhou Liu, Huidi Zhou, Jianmin Chen   +11 more
doaj   +1 more source

Rolling friction influences compaction and grain coordination in granular aggregate collisions

Astronomy & Astrophysics
Context. Collisional compaction of dust aggregates influences the fate of dust clouds and protoplanetary disks. Aims. The influence of rolling motion, which is among the parameters describing grain motion in an aggregate collision, has been poorly ...
Belén Planes María, Millán Emmanuel N., Urbassek Herbert M., Bringa Eduardo M.   +3 more
doaj   +1 more source

Wavy‐Interlocked Stretchable Triboelectric Nanogenerators Enhanced by Liquid Metal Microflowers for Self‐Powered Wearable Motion Monitoring

Advanced Science, EarlyView.
Schematic showing a stretchable triboelectric nanogenerator based on interlocked wavy architectures that uses EGaIn microflower‐embedded PVDF‐TrFE and Nylon‐6 nanofiber membranes. The multi‐petaled, electron‐rich EGaIn microflowers enhance interfacial polarization and capacitance, while the interlocked wavy architecture enlarges the effective contact ...
Qianqian Xu, Huimin Li, Hanmin Zeng, Yahui Meng, Yimeng He, Xinke Hu, Senfeng Zhao, Jianxun Zhang, Peiqiong Zhou, Kechao Zhou, Dou Zhang, Chris Bowen, Yan Zhang   +12 more
wiley   +1 more source

Friction in Oil-Lubricated Rolling–Sliding Contacts with Technical and High-Performance Thermoplastics

Lubricants
Thermoplastics show great potential due to their lightweight design, low-noise operation, and cost-effective manufacturing. Oil lubrication allows for their usage in high-power-transmission applications, such as gears.
Ferdinand Schmid, Thomas Lohner, Karsten Stahl   +2 more
doaj   +1 more source

DEM investigation on characteristics of rolling resistance for modelling particle shape

EPJ Web of Conferences, 2017
To examine the capability of rolling resistance to model the effects of particle shape, two sets of samples, composed of binary clumped particles and circular particles with rolling resistance, are tested in DEM simulation.
Zhou Lunlun, Chu Xihua, Xu Yuanjie
doaj   +1 more source