Results 31 to 40 of about 113,834 (330)

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

Advanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar, David Osman Busse, Maximilian Sprengel, Domenico Furfari, Marc‐André Nielsen, Guilherme Abreu Faria, Jérémy Epp   +6 more
wiley   +1 more source

Identification of Bearing Dynamic Parameters and Unbalanced Forces in a Flexible Rotor System Supported by Oil-Film Bearings and Active Magnetic Devices

Actuators, 2021
As the rotational speed of conventional rotor systems supported by oil-film bearings has increased, vibration problems such as oil whip and oil whirl have become apparent.
Yinsi Chen, Ren Yang, Naohiro Sugita, Junhong Mao, Tadahiko Shinshi   +4 more
doaj   +1 more source

Production of Metallic Foam Precursors Using Current‐Activated Pressure‐Assisted Densification

Advanced Engineering Materials, EarlyView.
A powder compaction metallurgical method, known as current‐activated pressure‐assisted densification, is applied to enhance the compaction of metal foam precursors. This method improves precursor quality by achieving higher density, lower electrical resistivity, and more uniform pore nucleation in the resulting foams, reducing energy consumption and ...
Tillmann Robert Neu, Paul Hans Kamm, Francisco García‐Moreno   +2 more
wiley   +1 more source

Investigating the Effects of Build Height on Mechanical Behavior of Large‐Scale Laser Wire Directed Energy Deposited Nickel Titanium Alloy

Advanced Engineering Materials, EarlyView.
Laser wire directed energy deposition process was leveraged to fabricate large scale NiTi alloy wall. Evaluation of build‐height‐dependent tribo‐mechanical properties revealed significant differences in location specific sample characteristics. The middle region achieved optimal performance (superior wear resistance, balanced strength‐ductility ...
Hyunsuk Choi, Prayag Burad, Piash Bhowmik, Vishal Mahey, Yashwanth Bandari, Sougata Roy   +5 more
wiley   +1 more source

Determining the Pressure Losses in the Main Oil Line and Injectors of the Lubrication System of Diesel Engines of Heavy Vehicles: Numerical Simulation

Механика машин, механизмов и материалов
This article presents the results that have provided a methodical basis for designing a digital twins of the main oil line and injectors of the lubrication system of a diesel engine.
Andrei D. Chorny, Igor A. Popov, Yuliya V. Zhukova, Tatsiana A. Baranova, Igor G. Kukharchuk, Igor A. Jr. Popov   +5 more
doaj   +1 more source

Dynamic Modeling and Analysis of Involute Spur Gear Transmission System Considering Friction and Multi-State Meshing Conditions

Xibei Gongye Daxue Xuebao, 2020
A dynamic model for an involute spur gear system involving multi-state mesh and friction is formulated to analyze the dynamic response and meshing state property under different lubrication conditions, such as an elastohydrodynamic and mixed lubrications

doaj   +1 more source

Small hydraulic turbine drives [PDF]

, 1970
Turbine, driven by the fluid being pumped, requires no external controls, is completely integrated into the flow system, and has bearings which utilize the main fluid for lubrication and cooling. Torque capabilities compare favorably with those developed
Rostafinski, W. A.
core   +1 more source

Additive Manufacturing of Hot Work Tool Steel by Laser Powder Bed Fusion Utilizing Powder Mixtures Including Grinding Chips: Assessing Chemical Homogeneity and Achievable Hardness

Advanced Engineering Materials, EarlyView.
Grinding chips of high‐alloyed steel are prepared to be admixed to a starting powder mixture for laser powder bed fusion. A three‐stage preparation is performed, including washing in acetone, magnetic separation, and ball milling. The addition of 30% of grinding chips to the powder mixture allows the fabrication of dense samples.
Felix Großwendt, Chengsong Cui, Jonathan Lentz, Rainer Fechte‐Heinen, Sebastian Weber   +4 more
wiley   +1 more source

Hydrodynamic and Thermal Processes in the Oil Cooler of the Lubrication System of Diesel Engines: Numerical Simulation

Механика машин, механизмов и материалов
This article presents the results that serve as a methodological basis for creating a digital twin of an oil cooler in a diesel engine lubrication system.
Igor A. Popov, Yuliya V. Zhukova, Andrei D. Chorny, Tatsiana A. Baranova, Igor G. Kukharchuk, Victor M. Gureev, Vladimir M. Medvedev, Igor A. Popov Jr.   +7 more
doaj   +1 more source

The Helios mechanical despin drive assembly for the high-gain antenna reflector [PDF]

, 1976
Helios is the German-American solar probe which comes within 0.31 Astronomical Units of the sun. A special thermal design and a dry lubrication system have resulted in successful operation up to now, with Helios having finished its first orbit around the
Mueller, E. J. W.
core   +1 more source