Results 121 to 130 of about 5,605 (307)

Enhancing the Ultrasonic Welding of Wood Using 3D Printed Lignin Energy Directors

Advanced Science, EarlyView.
Sustainable manufacturing for lightweight structures using ecofriendly materials will be key to reducing material consumption and lowering carbon footprints. Here, an approach is presented to weld wood using ultrasonic vibrations with material at the joint interface to direct energy.
Muhamad Amani, Kathrin Weiland, Mark Ablonczy, Natalia Sofia Guevara‐Sotelo, Ioannis Zygouris, Johan van Stuyvesant Meijen, Kunal Masania   +6 more
wiley   +1 more source

Influences of the Contact State between Friction Pairs on the Thermodynamic Characteristics of a Multi-Disc Clutch. [PDF]

Materials (Basel), 2022
Yu L, Zheng C, Wang L, Wu J, Jia R.
europepmc   +1 more source

Parametric uncertainty quantification using polynomial chaos expansions applied to a wet friction clutch model [PDF]

, 2019
Crevecoeur, Guillaume, De Geeter, Nele, De Groote, Wannes, Depraetere, Bruno, Lefebvre, Tom, Tod, Georges   +5 more
core   +1 more source

Top‐Down Fabricated Wood‐Derived Pressure and Strain Sensors: A Review

Advanced Science, EarlyView.
This review focuses on wood‐derived pressure/strain sensors fabricated via top‐down strategies. It analyzes wood's structural composition, examines processing techniques, discusses sensor types and sensing mechanisms, and reviews existing research. The article concludes with future directions for enhancing performance and scalability.
Yi Ren, Fuyao Liu, Yanan Zhong, Shengbo Ge, Zhipeng Shi, Siling Lin, Hongli Song, Yingying Zhang, Wei Fan   +8 more
wiley   +1 more source

Effects of Automotive Test Parameters on Dry Friction Fiber-Reinforced Clutch Facing Surface Microgeometry and Wear-Part 3 Tribological Parameter Correlations and Simulation of Thermo-Mechanical Tribological Contact Behavior. [PDF]

Polymers (Basel), 2023
Kalácska G, Biczó R.
europepmc   +1 more source

Results of NASA Technical Challenge to Demonstrate Two-Speed Drive for Vertical Lift Vehicle [PDF]

Currently, manned vertical lift vehicles are flown in a manner such that the rotors operate over a narrow range of rotating speed regardless if the vehicle's flight condition is one of vertical takeoff and landing, hover, or forward cruise.
Handschuh, Robert F., Krantz, Timothy L., Roberts, Gary D.   +2 more
core   +1 more source

Ultra‐High Friction and Adhesion in Hydrogel Layer Driven by Wet‐to‐Dry Transition Dynamics

Advanced Science, EarlyView.
This work reveals a critical wet‐to‐dry transition in polyacrylamide hydrogel layers that induces volumetric shrinkage, resulting in enhanced interfacial contact and dramatically increased friction and adhesion. Leveraging this transition enables strong, reversible gripping on diverse surfaces, offering new insights for hydrogel‐based gripping ...
Chenxu Liu, Tianhui Sun, Wenqing Chen, Hongjian Zhang, Pan Huang, Lin Yang, Yuan Yao, Qiongyao Peng, Ying Hu, Yonggang Meng, Yu Tian, Hongbo Zeng   +11 more
wiley   +1 more source

Influence of the Additive of Ceramic and Intermetallic Powders on the Friction Properties and Temperature of the Wet Clutch Disc. [PDF]

Materials (Basel), 2022
Yevtushenko A, Kuciej M, Grzes P, Ilyushchanka A, Liashok A.   +4 more
europepmc   +1 more source

Friction and temperature characteristics of wet clutch engagement

, 1997
För att erhålla mjukare växlingsförlopp och samtidigt få lång livslängd på våta kopplingar i automatväxellådor krävs förbättrad konstruktion. För att förbättra konstruktionen behövs mer kunskap om inkopplingsförloppet av våta kopplingar. En testrigg för att undersöka inkopplingsförloppet har byggts.
openaire   +1 more source

Rotorcraft convertible engine study [PDF]

The objective of the Rotorcraft Convertible Engine Study was to define future research and technology effort required for commercial development by 1988 of convertible fan/shaft gas turbine engines for unconventional rotorcraft transports. Two rotorcraft
Earle, R. V., Gill, J. C., Mar, H. M.
core   +1 more source