Results 11 to 20 of about 1,912,866 (270)

Some problems in hot rolling of al-alloys solved by the finite element method [PDF]

open access: yes
This thesis is focused on employing the finite element method (FEM) to simulate hot flat rolling process. The relevant work involves selecting a suitable constitutive equation, predicting the rolling load and roll torque, computing temperature changes ...
Duan, X.
core   +9 more sources

Condition monitoring of slow-speed rolling element bearings using stress waves [PDF]

open access: yes, 2001
Condition monitoring of rolling element bearings through the use of vibration analysis is an established technique for detecting early stages of component degradation. However, this success is not mirrored at rotational speeds below 16r/min.
Mba, David   +2 more
core   +7 more sources

Fault severity diagnosis of rolling element bearings based on kurtogram and envelope analysis [PDF]

open access: yes, 2014
Faults in rolling element bearing are among the main causes of breakdown in rotating machines. Vibration is an effective technique for machine condition monitoring.
Gu, Fengshou   +6 more
core   +7 more sources

A Novel Fault Feature Extraction Method for Bearing Rolling Elements Using Optimized Signal Processing Method

open access: yesApplied Sciences, 2021
A rolling element signal has a long transmission path in the acquisition process. The fault feature of the rolling element signal is more difficult to be extracted.
Weihan Li   +7 more
doaj   +1 more source

Modeling of Gas Lubricated Compliant Foil Bearings Using Pseudo Spectral Scheme

open access: yesTribology Online, 2015
A methodology for using the pseudo spectral scheme for the modeling of compliant gas lubricated foil bearings is presented in this work. The pseudo spectral scheme is used to obtain numerical solution of the compressible Reynolds’s equation that ...
Balaji Sankar, Sadanand Kulkarni
doaj   +1 more source

Structural design and magnetic field analysis on magnetic fluid lubricated bearings

open access: yesThe Journal of Engineering, 2022
A structural model of a bearing is proposed based on a general standard bearing structure and magneto‐fluidic lubrication, and the magnetic field of the bearing lubrication gap is analyzed under the action of an applied magnetic source. Results show that
Ao Wang, Jiabao Pan, Jin Ye, Huaibiao Wu
doaj   +1 more source

Simulation of Friction Fault of Lightly Loaded Flywheel Bearing Cage and Its Fault Characteristics

open access: yesSensors, 2022
Because of the operating environment and load, the main fault form of flywheel bearing is the friction fault between the cage and the rolling elements, which often lead to an increase in the friction torque of the bearing and even to the failure of the ...
Changrui Chen   +3 more
doaj   +1 more source

Rolling contact fatigue of silicon nitride. [PDF]

open access: yes
Silicon Nitride has traditionally been used as rolling contact bearing material owing to its superior performance compared to bearing steels. Its successful application as a bearing element has led to the development of Silicon Nitride in other rolling ...
Wang, W.
core   +9 more sources

Analytical investigation of a new approach to calculation for effective length of the rolling element used in closed end needle roller bearings of driveshaft

open access: yesEuropean Mechanical Science, 2022
The presence of the oscillating motion in a mechanical system, is vital in terms of the service life. Because the machine elements are under effect of fatigue due to the oscillating motion.
Onur Şen, Enver Atik
doaj   +1 more source

A Study of Rolling Contact Fatigue in Bearings with Rolling Elements

open access: yesInternational Journal for Research in Applied Science and Engineering Technology, 2022
Abstract: Excessive noise levels from wheels and brakes, tire wear levels, bearing hub wear, bearing humming, undercarriage noise, and other factors are considered in this study. According to the study findings, better design and fatigue life prediction are urgently needed to prevent accidents.
Firdous Zia, Gouraw Beohar
openaire   +1 more source

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