Results 101 to 110 of about 3,112 (223)

Ballistic Impacts with Bullet Splash-Load History Estimation for .308 Bullets vs. Hard Steel Targets. [PDF]

Materials (Basel), 2023
Andreotti R, Casaroli A, Colamartino I, Quercia M, Boniardi MV, Berto F.   +5 more
europepmc   +1 more source

Surface Modification of Sisal Fibers for Enhanced Interface and Performance in Bio‐Based Polyurethane Composites

Polymer Engineering &Science, EarlyView.
Schematic representation of the processing of sisal fibers (Agave sisalana) and their incorporation into bio‐based polyurethane composites. The fibers are extracted from the plant and subjected to surface modification via corona discharge and alkaline (NaOH) treatments.
Ianca Oliveira Borges, André Tetsuo Shashiki, Jhonatan Sales Satiro, Evelize Amaral Shashiki, Aline de Fátima Silva Lago, Henrique Andrade Alvarenga Barbosa, Ahmad Khan, Michele Lopes Medina, Rafael Carvalho do Lago, Gustavo Henrique Denzin Tonoli   +9 more
wiley   +1 more source

Efficiency testing of a helicopter transmission planetary reduction stage [PDF]

A parametric study of the efficiency of a 310-kW (420-hp) helicopter transmission planetary test section (four planets) was performed. The purpose was to determine the planetary contribution to the overall transmission power loss.
Handschuh, Robert F., Rohn, Douglas A.
core   +1 more source

Topography‐Free Dual‐Lubricant Patterned Slippery Surfaces for Programmable Droplet Control and High‐Performance Water Harvesting

Small, EarlyView.
A patterned dual‐lubricant SLIPS creates interfacial energy asymmetry, guiding droplet migration without external actuation. Condensed droplets formed on the fluorinated‐oil‐infused regions migrate to the silicone‐oil‐infused domains, where rapid growth and coalescence occur.
Jinchul Yang, Eonji Kim, Doo Young Choi, Jineun Lee, Hwanhui Yun, Jinhee Lee, Kyuyoung Heo, In Hwan Jung, Yong‐Jae Jin, Joon Heon Kim, Giseop Kwak, Wang‐Eun Lee   +11 more
wiley   +1 more source

Varnish Formation and Removal in Lubrication Systems: A Review. [PDF]

Materials (Basel), 2023
Hong SH, Jang EK.
europepmc   +1 more source

pH‐dependent electrochemical oxidation of 5‐hydroxymethylfurfural: Reaction mechanism, catalyst design, and reactor design across alkaline to acidic media

Smart Molecules, EarlyView.
This review summarizes the progress in pH‐dependent electrochemical oxidation of 5‐hydroxymethylfurfural for value‐added chemical production. It highlights how pH dictates reaction mechanisms and product selectivity, discusses strategies for designing effective electrocatalysts tailored for alkaline, near‐neutral, or acidic electrolytes, and explores ...
Peiyun Zhou, Xikang Zhao, Yang Song, Ruixiang Ge, Haohong Duan   +4 more
wiley   +1 more source

Lubrication and cooling for high speed gears [PDF]

The problems and failures occurring with the operation of high speed gears are discussed. The gearing losses associated with high speed gearing such as tooth mesh friction, bearing friction, churning, and windage are discussed with various ways shown to ...
Townsend, D. P.
core   +1 more source

High Power Density for All‐Fe2VAl‐based Thermoelectric Module by Enhancing the Power Factor of p‐type Leg Through Defect‐Engineering and Wetting Effect

Small Methods, EarlyView.
ABSTRACT The high thermoelectric performance of Fe2VAl stems from its sharply rising band edges on either side of the band gap, which is highly sensitive to composition. Addressing reproducibility and scale‐up challenges, we have developed a strategy to enhance its p‐type thermoelectric performance by defects and grain boundary engineering through ...
Tarachand, Naohito Tsujii, Raju Chetty, Jayachandran Babu, Takao Mori   +4 more
wiley   +1 more source

High Temperature Tribological Performance of Steel/Copper Friction Pairs Lubricated with a Modified C-WS₂-(Fe₃O₄ + TiN) Nanoadditives in Non-Copper Coated Solid Wires. [PDF]

Nanomaterials (Basel), 2022
Li H, Zhu J, Chen Z, Li Z, Meng B.
europepmc   +1 more source

Empirical Physics‐Based Normal Behavior Modeling of Drive Train Temperatures With High‐Resolution Wind Turbine Operating Data

Wind Energy, EarlyView.
ABSTRACT The installed wind energy capacity increases every year. However, operation and maintenance costs still make up a considerable portion of the levelized costs of electricity. This costs can be greatly reduced by the application of suitable early fault detection methods. The supervisory control and data acquisition system of wind turbines is one
Timo Lichtenstein, Victor von Maltzahn, Karoline Pelka   +2 more
wiley   +1 more source