Results 21 to 30 of about 34,568 (304)

Analyzing the Fretting Fatigue of Bolt Joints by Experiments and Finite Element Analysis

Lubricants, 2023
The appearance of fretting fatigue cracks in bolted sheets limits their lifetime. Furthermore, repairing these failures requires much effort due to needing to replace the components instead of replacing just the bolt.
Robert Szlosarek, Paul Holzmüller, Matthias Kröger   +2 more
doaj   +1 more source

Effect of alignment errors on operation of machine tool spindle with active bearing preloading module [PDF]

Archive of Mechanical Engineering, 2020
The article describes a test stand with a spindle equipped with an active bearing preload system using piezoelectric actuators. The proper functioning of the spindle and the active system was associated with the correct alignment of the spindle shaft and
Paweł Turek, Marek Stembalski
doaj   +1 more source

Loss of preload in preloaded bolted connections over the service life [PDF]

ce/papers, 2021
AbstractThe design of slip‐resistant connections and fatigue loaded tension connections according to the categories B/C and E of EN 1993‐1‐8 relies on a specified preload level of the bolted connections which has to be ensured over the whole service life of the structure.
Natalie Stranghöner, Lukas Makevičius, Knuth‐Michael Henkel, Ralf Glienke, Maik Dörre   +4 more
openaire   +1 more source

Prevalence and risk factors of hemodynamic instability associated with preload-dependence during continuous renal replacement therapy in a prospective observational cohort of critically ill patients

Annals of Intensive Care, 2020
Background Hemodynamic instability is a frequent complication of continuous renal replacement therapy (CRRT). Postural tests (i.e., passive leg raising in the supine position or Trendelenburg maneuver in the prone position) combined with measurement of ...
G. Chazot, L. Bitker, Mehdi Mezidi, N. Chebib, P. Chabert, L. Chauvelot, L. Folliet, G. David, Judith Provoost, Hodane Yonis, J. Richard   +10 more
semanticscholar   +1 more source

Restrictive preload vs restrictive coload with normal saline for unilateral low-dose bupivacaine (5 mg) spinal anesthesia in diagnostic and therapeutic knee arthroscopy

Медицина неотложных состояний, 2022
Background. Unilateral spinal anesthesia with low-dose hyperbaric bupivacaine in diagnostic and therapeutic knee arthroscopy may lead to hemodynamic complications.
A.G. Tutunnyk, A.A. Krishtafor, L.V. Usenko   +2 more
doaj   +1 more source

Preload Control Method of Threaded Fasteners: A Review

Chinese Journal of Mechanical Engineering
Threaded fasteners are one of the most commonly used connection methods for mechanical structures. Its primary function is to generate appropriate clamping forces and fasten the connected parts.
Xing Yan, Zhifeng Liu, Mingpo Zheng, Ying Li, Yuezhen Wang, Wentao Chen   +5 more
semanticscholar   +1 more source

Understanding preload and preload reserve within the conceptual framework of a limited range of possible left ventricular end-diastolic volumes.

Advances in Physiology Education, 2020
Preload has been variously defined, but if there is to be a direct relationship with activity of the Frank-Starling mechanism in its action to increase the force and extent of contraction, preload must directly reflect myocardial stretch.
R. Peverill
semanticscholar   +1 more source

Investigation of non-uniform preload effect on stiffness behavior of angular contact ball bearings

Advances in Mechanical Engineering, 2017
Preloading is an effective way to maintain good performance of angular contact ball bearings. Traditionally, the rigid and constant preload are applied by uniform approaches on the bearing system.
Wenwu Wu, Jun Hong, Yang Li, Xiaohu Li
doaj   +1 more source

A Study of Preload Detection Technology in Suspension Bridge Cable Clamp Bolts Based on the Pull-Out Method

Buildings
The pull-out method is a simple and effective method for detecting the preload of suspension bridge cable clamp bolts. However, research on the pull-out method is currently limited.
Fengrui Mu, Gui Zhu, Yongjun Zhou, Zhongguo John Ma, Yuan Jing, Yu Zhao   +5 more
doaj   +1 more source

Mean total intake (kcal) on the pizza preload and no-preload test days.

, 2015
Errors bars represent ± 1 SE from the mean. * Total intake (preload + test-meal) significantly higher on preload day relative to no-preload day, p
Lesley Kyle (732169), Jeffrey M. Brunstrom (295769), Peter J. Rogers (295773), Charlotte A. Hardman (732168), Danielle Ferriday (295778)   +4 more
core   +1 more source