Results 51 to 60 of about 8,385,794 (295)

Effects of wall compliance on the laminar–turbulent transition of torsional Couette flow [PDF]

, 2003
Torsional Couette flow between a rotating disk and a stationary wall is studied experimentally. The surface of the disk is either rigid or covered with a compliant coating.
Ali, Reza, P. LE GAL, Le Gal, P., Schouveiler, Lionel, Thomas, Peter J., Chauve, Marie-Pierre, Schouveiler, L., L. SCHOUVEILER, Chauve, M. P., Carpenter, Peter W., P. W. CARPENTER, Carpenter, P. W., A. CROS, Ali, R., Cros, Anne, M. P. CHAUVE, Thomas, P. J., Le Gal, Patrice, Cros, A., P. J. THOMAS, R. ALI   +20 more
core   +1 more source

A Numerical–Experimental Approach for Multi‐Matrix Fiber‐Reinforced Plastics Characterization Using Finite Element Model Updating

Advanced Engineering Materials, EarlyView.
A numerical–experimental framework is developed for characterizing multi‐matrix fiber‐reinforced polymers (MM‐FRPs) combining epoxy and polyurethane matrices. Harmonic bending tests are integrated with finite element model updating (FEMU) to simultaneously identify elastic and viscoelastic material parameters.
Rodrigo M. Dartora, Tales V. Lisbôa, Axel Spickenheuer, Rogério J. Marczak, Jakson M. Vassoler   +4 more
wiley   +1 more source

The effect of high-frequency torsional impacts on the dynamic response of a drill string in a stick state

Advances in Mechanical Engineering, 2019
Stick–slip vibration is common in the oil well drilling process and is detrimental to down-hole equipment and drilling efficiency. In recent years, a new type of drilling technology, torsional impact drilling, has been developed to mitigate the stick ...
Liping Tang, Wei He, Xiaohua Zhu
doaj   +1 more source

Stability Analysis of Electromechanical Coupling Torsional Vibration for Wheel-Side Direct-Driven Transmission System under Transmission Clearance and Motor Excitation

World Electric Vehicle Journal, 2022
The wheel-side direct-driven transmission system (WDTS) is a new intelligent transmission technology, which has significant advantages in high-efficiency and few malfunctions for the electric bus.
Jinyong Ju, Yufei Liu, Chunrui Zhang
doaj   +1 more source

Affecting the Properties of Copper–Graphene Electroconductive Composite by Severe Plastic Deformation

Advanced Engineering Materials, EarlyView.
Copper‐based composites enhanced with carbon feature convenient mechanical properties and favorable electric conductivity. Processing via deformation and thermomechanical treatments can introduce advantageous microstructures further enhancing their performance. Herein, copper–graphene powder‐based composites are directly consolidated via rotary swaging
Radim Kocich, Lenka Kunčická, Pavel Czernek, Zifan Wang   +3 more
wiley   +1 more source

Torsional Resonance Identification in Turbine-Generator Shaft Due to the Operation of Electric Arc Furnaces at Steel Mills in Bangladesh Power System

IEEE Access, 2023
Many steel mills in Bangladesh use electric arc furnaces (EAFs) that can impact the generating units of the country’s power system. The EAFs can cause power quality problems, such as the injection of the sub-synchronous frequencies (SSFs), which ...
Md. Minarul Islam, Abdul Hasib Chowdhury, Md. Shafiullah, Kashem M. Muttaqi, Danny Sutanto, Taha Selim Ustun   +5 more
doaj   +1 more source

Oligothiophene wires: impact of torsional conformation on the electronic structure

Physical Chemistry Chemical Physics, 2016
Different torsional conformations of alkyl-substituted oligothiophenes show nearly identical progressions of particle-in-a-box-like electronic orbitals.
D A, Kislitsyn, B N, Taber, C F, Gervasi, L, Zhang, S C B, Mannsfeld, J S, Prell, A L, Briseno, G V, Nazin   +7 more
openaire   +3 more sources

Comparison of Triply Periodic Minimal Surface Energy Absorbers Under Uniaxial Compressive Loading

Advanced Engineering Materials, EarlyView.
This study investigates LCD 3D printed Triply Periodic Minimal Surface (TPMS) structures as mechanical energy absorbers. By comparing various base designs and layered combinations under uniaxial compression, it identifies that a Diamond‐Gyroid sandwich structure offers superior performance.
Sergej Grednev, Noah‐Lean Roschlaub, Anne Jung   +2 more
wiley   +1 more source

Experiment and Simulation of Self-excited Torkbuster

Shiyou jixie, 2017
The stick-slip vibration is a technical bottleneck restricting for PDC bit in efficient drilling deep hard formation. To reduce the stick-slip vibration of drill bit during drilling deep hard formations, a torkbuster has been introduced.
Ma Hongyan, Wang Hongbo, Wang Daning, Zhang Jingsong, Zhang Yanrui, Quan Hulin   +5 more
doaj  

Transient torsional vibration analysis of marine diesel engine under short-circuit impact

Zhongguo Jianchuan Yanjiu
ObjectivesIn order to formulate an optimization scheme for the torsional vibration parameters of a marine diesel generator shaft system, it is necessary to analyze the transient torsional vibration characteristics of the diesel generator under short ...
Congcong XU, Gang LIANG, Jie TAO, Yafei JIAO, Jinyuan CHEN, Pengcheng WANG, Mengcan DENG   +6 more
doaj   +1 more source