Results 11 to 20 of about 34,568 (304)

Investigation of multiple spindle characteristics under non-uniform bearing preload

open access: yesAdvances in Mechanical Engineering, 2016
The non-uniform distribution load during machining and assembly process is crucial for spindle system, especially in complex working conditions. The conception of non-uniform preload adjustment approach was proposed and experimentally investigated in ...
Yanfei Zhang   +4 more
doaj   +2 more sources

Research on preload relaxation for composite pre-tightened tooth connections

open access: yesScience and Engineering of Composite Materials, 2019
Preload is the primary reason why pre-tightened tooth connections (PTTC) can transfer relatively large loads. However, creep of the composite would cause the preload relaxation, resulting in reducing bearing capacity of the connection.
Li Fei   +3 more
doaj   +2 more sources

Effects of abutment screw preload and preload simulation techniques on dental implant lifetime

open access: yesJADA Foundational Science, 2022
Background. This study aimed to investigate how the predicted implant fatigue lifetime is affected by the loss of connector screw preload and the finite element analysis method used to simulate preload. Methods.
M. Satpathy, R. Jose, Y. Duan, J. Griggs
semanticscholar   +1 more source

Extracardiac Abnormalities of Preload Reserve: Mechanisms Underlying Exercise Limitation in Heart Failure with Preserved Ejection Fraction, Autonomic Dysfunction, and Liver Disease.

open access: yesCirculation: Heart Failure, 2021
While many of the cardiac limitations to exercise performance are now well-characterized, extracardiac limitations to exercise performance have been less well recognized but are nevertheless important.
M. Fudim, P. Sobotka, M. Dunlap
semanticscholar   +1 more source

T-Bolt preload and load

open access: yes, 2023
Bolt stress is very sensitive to load eccentricity. Three uniaxial strain gauges were placed in the "Y" direction on the external surface of the reduced section of the bolt. The strain gauges were placed 120° apart. If there is no eccentricity,
Munoz, G (via Mendeley Data)
core   +3 more sources

Do changes in pulse pressure variation and inferior vena cava distensibility during passive leg raising and tidal volume challenge detect preload responsiveness in case of low tidal volume ventilation?

open access: yesCritical Care, 2020
Background In patients ventilated with tidal volume ( V t) 
Temistocle Taccheri   +4 more
semanticscholar   +1 more source

Clinical review: Goal-directed therapy in high risk surgical patients [PDF]

open access: yes, 2009
A small group of patients account for the majority of peri-operative morbidity and mortality. These 'high-risk' patients have a poor outcome due to their inability to meet the oxygen transport demands imposed on them by the nature of the surgical ...
Lees, N, Rhodes, A, Hamilton, M
core   +1 more source

Fatigue Life Analysis of Ball Bearings and a Shaft System Considering the Combined Bearing Preload and Angular Misalignment

open access: yesApplied Sciences, 2020
Bearing preload significantly affects the running performance of a shaft-bearing system including the fatigue life, wear, and stiffness. Due to the mounting error, the bearing rings are often angularly misaligned.
Yu Zhang   +3 more
semanticscholar   +1 more source

Bearing preload optimization for machine tool spindle by the influencing multiple parameters on the bearing performance

open access: yesAdvances in Mechanical Engineering, 2017
The bearing preload plays an important role on the bearing performance, particularly the important characteristics of the bearing include bearing temperature increases, the bearing fatigue life, and ball skidding.
Yanfang Dong, Zude Zhou, Mingyao Liu
doaj   +1 more source

Detecting Preload Changes Using Seismocardiography [PDF]

open access: yes, 2023
Seismocardiography (SCG) is a non-invasive tool that utilizes the chest wall vibrations from the beating heart to measure cardiac movements through a highly sensitive accelerometer.
Kristensen, Charlotte Burup   +4 more
core   +1 more source

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