Relevant bibliographies by topics / Preload force

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Preload force'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "Preload force"

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Kim, Seonjin, Les G. Carlton, and K. M. Newell. "Preload and Isometric Force Variability." Journal of Motor Behavior 22, no. 2 (1990): 177–90. http://dx.doi.org/10.1080/00222895.1990.10735509.

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Gillebert, T. C., and D. F. Raes. "Preload, length-tension relation, and isometric relaxation in cardiac muscle." American Journal of Physiology-Heart and Circulatory Physiology 267, no. 5 (1994): H1872—H1879. http://dx.doi.org/10.1152/ajpheart.1994.267.5.h1872.

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It is widely believed that preload does not influence isometric relaxation and left ventricular pressure fall. Preload, however, alters cross-bridge interaction and intracellular Ca2+ handling. We therefore evaluated the effects of preload reduction on peak length-tension relation and on physiologically sequences isometric force decline. 1) Acute preload reduction resulted in a shift to the left of the peak length-tension relation, an earlier onset of force decline, and an increased rate of initial force decline. 2) Prolonged preload reduction was compared with acute preload reduction and resu
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Hwang, Pyung, and Polina V. Khan. "Bifurcation Analysis of the Load/Unload Systems With Multiple Flying Height States." Journal of Tribology 128, no. 3 (2006): 665–69. http://dx.doi.org/10.1115/1.2197852.

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The load/unload behavior of the hard disk drive slider is studied in terms of the air bearing static characteristics. The application of numerical continuation methods to calculate spacing diagrams is proposed. The algorithm that detects multiple flying height states and fold points is developed. The relationship between suspension force x-offset and critical preload is found for femto size sliders. The second fold corresponding to the critical preload for unloading is found in the negative air bearing force area. The range of x-offsets and preloads where bi-stable phenomenon exists is depicte
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Wang, Ji, and Jian Hua Zheng. "Stress Analysis for Electric Stop Valve of Nuclear Power Plant Considering Action of Preload and Stem Force." Applied Mechanics and Materials 313-314 (March 2013): 1210–13. http://dx.doi.org/10.4028/www.scientific.net/amm.313-314.1210.

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The finite element model of electric stop valve with flange bolts preload and valve stem force was established to improve the valve stress calculation method which was based only on action of fluid pressure, thermal stresses and pipe reaction forces. The principle and application of pretension load elements were expounded. By ANSYS, the stresses of this valve with preload and valve stem force were calculated, and the Mises equivalent stresses contour and some values of key position of whole valve were obtained. The results indicate the influence of the stresses on the valve caused by preload o
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Chen, Xi, Yasushi Miyagi, Junji Nishimura, Sei Kobayashi, Masashi Fukui, and Hideo Kanaide. "Resting Load and Modulation of the Myofilament Ca2+ Sensitivity in Rabbit Cerebral Arteries." Journal of Cerebral Blood Flow & Metabolism 17, no. 2 (1997): 236–40. http://dx.doi.org/10.1097/00004647-199702000-00015.

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The effect of preload on myofilament Ca2+ sensitivity was examined using α-toxin permeabilization and fura-2 fluorometry in rabbit cerebral arteries. The [Ca2+]i-force curves shifted leftward at a high preload, with a decrease in median effective concentration of Ca2+ in the permeabilized artery. In the fura-2-loaded artery, the preload modulated the force without affecting [Ca2+]i levels during K+ depolarization, and a high preload moved the [Ca2+]i-force curve upward and to the left. It is thus concluded that the preload regulates the Ca2+ sensitivity of the myofilament and, therefore, may p
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Li, Xiao-hu, Yan-fei Zhang, Jun Hong, Hong Zhao, and Huan-feng Li. "Experiment analysis of spindle performance with rolling bearing under non-uniform preload." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, no. 17 (2016): 3135–46. http://dx.doi.org/10.1177/0954406215605867.

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As a result of the manufacturing errors in the main parts of spindle, and the errors in assembly process of spindle, as well as the non-uniform heat distribution during spindle operation, the non-uniformly distributed preload in rolling bearing is inevitable. The non-uniform preload has not only axial force on the rolling bearing, but also the bending moment around the rolling bearing center. The effect of preload in bearing being non-uniform on the spindle performance is still unclear. In order to analyze the spindle performance with rolling bearing under non-uniform preload, a spindle test s
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Barbu, Stefan, Dorin Telea, and Ilie Octavian Popp. "Study on Improving the Functional Performance of Linear Motion Systems." Applied Mechanics and Materials 760 (May 2015): 583–88. http://dx.doi.org/10.4028/www.scientific.net/amm.760.583.

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In the construction of high performance mechanical transmission with high precision in movement and positioning are used ball screws with preloaded double nuts. Among the factors that influence the performance of these transmissions are friction idle torque and friction load torque. Because, theoretically, the friction idle torque is influenced only by the preload force that loading, the double nut of the ball screw, was experimentally determined dependence of that torque of screw speed. Given the set was determined and exposed in the present work, the relation of dependency, idle friction tor
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Long, Rong, and C. Y. Hui. "The effect of preload on the pull-off force in indentation tests of microfibre arrays." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 465, no. 2103 (2008): 961–81. http://dx.doi.org/10.1098/rspa.2008.0362.

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We determined how preload and work of adhesion control the force required to pull a circular cylindrical indenter off a microfibre array. Five regimes, with different contact behaviours, are identified for the unloading phase of indentation. These regimes are governed by two dimensionless parameters. Above a critical preload, the pull-off force and the pull-off stress reach a plateau value. The critical preload, as well as the plateau pull-off force (stress), is found to depend on a single dimensionless parameter q , which can be interpreted as a normalized work of adhesion.
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Hu, Junshan, Kaifu Zhang, Hui Cheng, and Zhenchao Qi. "Mechanism of bolt pretightening and preload relaxation in composite interference-fit joints under thermal effects." Journal of Composite Materials 54, no. 30 (2020): 4929–46. http://dx.doi.org/10.1177/0021998320941218.

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The present research investigates the mechanism of bolt pretightening and preload relaxation in composite interference-fit joint structures under thermal effects. In view of the dissimilar material properties and the interfacial friction in such joints, the mechanical behavior of bolt and composites during assembly can be regarded as immediate preload response which is described by a linear elastic model, whereas the long-term behavior of composites during preload relaxation in service is considered as delayed response which is characterized by a viscoelastic model. The clamping forces on both
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Liu, Jun, and Yi Ou. "Dynamic axial contact stiffness analysis of position preloaded ball screw mechanism." Advances in Mechanical Engineering 11, no. 1 (2019): 168781401881928. http://dx.doi.org/10.1177/1687814018819289.

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This article establishes an axial contact stiffness model of position preloaded ball screw mechanism based on Hertz contact theory. The analysis of dynamic axial contact stiffness is one of the foundations of the research on the dynamic characteristic of the ball screw feed drive system. The model takes into account the coupling relationship between the contact angle and the normal contact force, as well as the coupling relationship between the elastic deformation and the contact deformation coefficient. The static and dynamic axial contact stiffness characteristics of the preloaded ball screw
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Dissertations / Theses on the topic "Preload force"

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Ramadoss, Vivek. "Analysis of capillary forces in electrowetting and precision self assembly." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002439.

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Lekeš, Filip. "Analýza vlivu lisovací síly plechů rotorového paketu na kritické otáčky elektromotoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-418193.

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The presented diploma thesis deals with the modeling of the rotor packet in dynamic calculations and analysis of the influence of the packing pressing force on the critical speed of the electric motor. The thesis can be divided into three main parts. The first part discusses the current level of rotor packet modeling in dynamic calculations and also deals with analytical theories for subsequent experimental tests. The second part describes the implementation of two experiments to determine the equivalent modulus of elasticity. The first experiment is a four-point bending test and the second is
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James, Aricatt John, and Devarajan Velmurugan. "Determination of stresses and forces acting on a Granulator knife by using FE simulation." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH. Forskningsmiljö Produktutveckling - Simulering och optimering, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-28297.

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Recycling of plastics always plays an important role in keeping our environment better and safe. With the rise in usage of plastics and industrialization, the need for recycling the plastics has become a big business and is getting bigger. This thesis work was done for a company called Rapid Granulator AB, which works with the recycling of plastics as a big trade in Sweden. Like all the industries across the globe are trying to be economical in every way, Rapid Granulator AB wanted to develop an economical design of their high quality granulating knife. For achieving the economical design, the
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LIOU, JHIH-HAO, and 劉志豪. "Application Of Force Sensor To Monitor Ball Screw Preload And Assembly Parallelism." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/f9tg33.

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碩士<br>國立中正大學<br>機械工程系研究所<br>106<br>Monitoring of force is an important means of implementing smart manufacturing, and the installation of sensitive and robust sensors in appropriate locations for monitoring purposes is the key to smart manufacturing. Ball screw is the basic element in mechanical equipment. This research , a self-designed force sensor was installed at the relevant position in the ball screw to monitor whether the rigidity change of the ball screw during long-term use and the parallelism of the installation were appropriate, so as to demonstrate the design of the force sensor.
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Ho, Jeng-Wei, and 何政衛. "The influence on axial force of precision locknut under different preload and lock torque." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/22325468692431217818.

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碩士<br>國立勤益科技大學<br>機械工程系<br>100<br>This paper researches for the influences of flank lock type, radial lock type and Clasp locking type precision locknuts on axial force of bearing under static test by different sizes, axial force and tighten torque, confers whether the change rate of axial force of bearing has a specific trend and regulation when using the precision lock nut, then find out the properties of quality of the precision lock nut, then builds the equations of properties of quality of the precision lock nut under static test by two times pair fits, provides the manufactory with the r
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You, Hui-Ting, and 游惠婷. "Effect of Preload Force of Linear Component on Dynamic Characteristics of a CNC Vertical Column-Spindle System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/72002264323215266321.

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碩士<br>國立勤益科技大學<br>機械工程系<br>98<br>Realization on the dynamic characteristics of the column spindle system is of importance for enhancing the structural performance of a vertical milling machine. Generally, the spindle head is fed under linear guide mechanism through a ball-screw driver. To assess the dynamic characteristics and machining stability of a vertical milling system under the influence of a linear guide, this study developed a finite element model integrated the modeling of linear components with the implementation of contact stiffness at the rolling interface. Both the finite element
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Books on the topic "Preload force"

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Souza, Ernesto Vázquez. A fouce, o hórreo e o prelo: Ánxel Casal ou o libro galego moderno. Ediciós do Castro, 2003.

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Montgomery, Hugh, and Rónan Astin. Normal physiology of the cardiovascular system. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199600830.003.0128.

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Preload modulates contractile performance, and is determined by end-diastolic volume (EDV) and ventricular compliance. Compliance falls with increasing preload, muscle stiffness or ventricular hypertrophy, making central venous pressure (CVP) a poor surrogate for EDV. Responsiveness to fluid loading can be identified by seeking a change in stroke volume (SV) with changes in cardiac loading. Afterload, the force to be overcome before cardiac muscle can shorten to eject blood, rises with transmural pressure and end-diastolic radius, and inversely with wall thickness. Afterload, being the tension
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M, Johnston L., Czekalski B, and George C. Marshall Space Flight Center., eds. Effect of flange bolt preload on space shuttle main engine high pressure oxidizer turbopump housing analysis. National Aeronautics and Space Administration, George C. Marshall Space Flight Center, 1991.

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M, Johnston L., Czekalski B, and George C. Marshall Space Flight Center., eds. Effect of flange bolt preload on space shuttle main engine high pressure oxidizer turbopump housing analysis. National Aeronautics and Space Administration, George C. Marshall Space Flight Center, 1991.

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Kreit, John W. Cardiovascular–Pulmonary Interactions. Edited by John W. Kreit. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780190670085.003.0003.

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Intramural pressures within a tube or circuit determine the rate and direction of flow, whereas the transmural pressure of an elastic structure determines its volume. In Chapter 1, we applied these principles when talking about the pressure needed to overcome viscous forces and elastic recoil during ventilation. In this chapter, we use them to explain changes in blood flow between two portions of the circulatory system and changes in the volume and size of the heart chambers. Cardio–Pulmonary Interactions provides an overview of essential cardiovascular physiology as well as an in-depth discus
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Raghunathan, Karthik, and Andrew Shaw. Crystalloids in critical illness. Oxford University Press, 2016. http://dx.doi.org/10.1093/med/9780199600830.003.0057.

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‘Crystalloid’ refers to solutions of crystalline substances that can pass through a semipermeable membrane and are distributed widely in body fluid compartments. The conventional Starling model predicts transvascular exchange based on the net balance of opposing hydrostatic and oncotic forces. Based on this model, colloids might be considered superior resuscitative fluids. However, observations of fluid behaviour during critical illness are not consistent with such predictions. Large randomized controlled studies have consistently found that colloids offer no survival advantage relative to cry
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Book chapters on the topic "Preload force"

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Novoselac, Stipica, Dražan Kozak, Todor Ergić, and Darko Damjanović. "Fatigue Damage Assessment of Bolted Joint Under Different Preload Forces and Variable Amplitude Eccentric Forces for High Reliability." In Fracture at all Scales. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-32634-4_13.

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Butner, Charles, Douglas Adams, and Jason Foley. "Understanding the Effect of Preload on the Measurement of Forces Transmitted Across a Bolted Interface." In Conference Proceedings of the Society for Experimental Mechanics Series. Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-9299-4_48.

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Isiaka, Fatima, Awwal M. Adamu, Salihu A. Abdulkarim, and Abdullahi Salihu. "Simulating the Effect of Friction on Drive Screw Using System-of-System Modeling with Predetermined Torque." In Systems-of-Systems Perspectives and Applications - Design, Modeling, Simulation and Analysis (MS&A), Gaming and Decision Support. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.92261.

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In most mechanical systems, screw threads serve three main basic purposes: (i) to transmit power, (ii) to provide a clamping force, and finally (iii) to restrict or control motion. This chapter demonstrates the effects of friction and behavior which can occur in a bolted fastening (screw thread) for advanced design purposes. To model this behavior, other control components are attached to the bolted screw. The bolt preload is applied with a predetermined torque. For this case the preload depends on the friction under the head and in the thread. The friction prevents the loosing of the bolted fastening. This effect is termed as self-locking effect. We designed an algorithm that reproduces an exemplary simulation scenario, which determines friction and its effect on thread angle based on the strength of the coefficient of friction at a specific tension or clamp load value using the system-of-system approach. The result shows specific behavior on both the motion in threads and drive screw with predetermined torque. The chapter is limited to creating a simple simulation environment to demonstrate the effects.
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Conference papers on the topic "Preload force"

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Shah, Vikram N. "Uncertainty of Preloads in Closure Bolts for Transportation Casks for Hazardous and Radioactive Materials." In ASME 2008 Pressure Vessels and Piping Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/pvp2008-61360.

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Maintaining closure bolting integrity under normal and accident conditions is essential for the safe transportation of shipping casks bearing hazardous and radioactive materials. Bolt preload introduces a clamping force in the joint that plays a critical role in ensuring a less-than-specified rates of leakage from such casks. Precise control over bolt preload is essential to introduce adequate clamping force in the joint. Uncertainty is introduced in the closure bolt preloads when an individual bolt is tightened and then when the other bolts are tightened in a specified sequence. Tightening an
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Zhang, Meng, Zhigang Liu, Mingfan Bu, and Yu Zhu. "Pretension Analysis for Piezoelectric Stack Actuator in Nano-Positioning Stage." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-70508.

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Taking advantages of high stiffness, fast response, high-bandwidth as well as large pushing force capability, piezoelectric stack actuators have been widely used in the fields of high speed nano-positioning stages and precision systems. An inevitable disadvantage of piezoelectric actuators is that they are highly intolerant to shear and tensile forces. During high speed scanning operations, the inertial forces due to the effective mass of the stage may cause the actuators to withstand excessive shear or tension forces. To protect the actuators, preload is often applied to compensate for these
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Isele, D., C. Friedrich, and A. Isele. "Analysis of Preload Loss With Corrosion Protection Layers in the Flow of Force." In ASME 2016 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/imece2016-66005.

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This contribution investigates the tightening behavior and preload loss of bolted joints with painted coating systems for corrosion protection of components. Friction coefficients are measured with test stand, preload loss is measured by strain gauges. Further evaluation is done with optical roughness measurement to see damage of the painted surfaces in contact areas. Resulting from this hints for applications get obvious. Research progress focuses the quantification of preload loss in different applications. Mechanical loads are neglected at that stage because of minor influence as the temper
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Omiya, Yuya, and Masahiro Fujii. "Correlation on Scatter Between Torque Coefficient and Bolt Preload in Pipe Flange Connection." In ASME 2016 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/pvp2016-63720.

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In this paper, a mechanism of variation in axial bolt force in pipe flange connection during bolt tightening process is investigated. Especially, Correlation between torque coefficient and bolt preload is investigated. The actual pipe flange connection is tightened by a wrench due to the torque control method. Axial bolt forces were measured in the tightening process. The three types of gasket are chosen in this paper. As a result the good relationships are seen between torque coefficient and axial bolt force. The effect of gasket material on the relationships between torque coefficient and bo
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Zennaro, Marco, Alex Haig, Dan J. O’Boy, and Stephen J. Walsh. "An Investigation of Ultrasonic Transducer Loading on a Workpiece." In ASME 2018 Noise Control and Acoustics Division Session presented at INTERNOISE 2018. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/ncad2018-6125.

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Arrays of dry-coupled thickness-shear transducers are often employed in the guided wave sector to inspect pipelines and plate-like structure. The dry coupling permits to dismiss any coupling material between the transducer and the waveguide, but as a drawback a preload must be applied on the transducers to guarantee an effective coupling between the two surfaces. Although the influence of the preload on the natural frequencies is studied in the literature, the frequency response function of a transducer relating the input voltage to the displacement output is not present in the literature. Mor
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Fukuoka, Toshimichi, and Nobukuni Sugano. "Measurement of Bolt Clamping Forces by Electromagnetic Vibration Method Without Disassembling Bolted Joints." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93166.

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The integrity and safety of a bolted joint can be greatly guaranteed by applying and maintaining an appropriate amount of bolt preloads. However, the variation of bolt preloads inevitably occurs in the service condition due to various reasons, even if the initial bolt preloads are properly applied. Accordingly, the monitoring of bolt forces in the service condition is significantly important. From the practical point of view, it is preferably conducted without disassembling the objective bolted joint. In this paper, Electromagnetic Vibration Method is introduced for monitoring the variation of
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Sawa, Toshiyuki, Kengo Kuwaki, Yukio Morozumi, and Masahiko Okumura. "FEM Stress Analysis of the Characteristics of Bolted Joints Under External Loadings (In the Case Where Two Hollow Cylinders Are Clamped)." In ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/detc2011-48247.

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In designing bolted joints, it is necessary to know the stress distributions in bolted joints. Recently, high strength bolts have been used with a higher bolt preload. As the results, the permanent set occurs sometimes at the bearing surfaces of clamped parts in a bolted joint. In addition, when an external load is applied to the bolted joint, the permanent set can be extended at the bearing surfaces. As the permanent set increases, the reduction in the bolt preload increases. Thus, it is important to estimate the reduction in the bolt preload from the reliability stand point. However, no stud
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Hung, Y. Y., Y. H. Huang, and L. Liu. "Novel Washer as Force Transducer for Monitoring Clamping Force of Bolted Joints." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-94024.

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Bolts are widely used in industry for joining members together. The behavior and service life of bolted joints depend on several factors like bolt material, dimensions, surface finish, surface coating and thread tolerances. However, the uppermost factor affecting the reliability and durability is the correctness of the clamping force exerted by the bolt. Thus it is very important to monitor the bolt clamping force during assembly process to ensure a proper preload. Each of the available monitoring techniques including torque control, torque-angle control, strain gaged bolt and ultrasound suffe
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Xu, T., and G. G. Lowen. "A New Damping Model for Non-Linear Stiffness Systems With Variable Preload Displacements and Constant Amplitude Decay Ratios." In ASME 1992 Design Technical Conferences. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/detc1992-0273.

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Abstract This study of the behavior of non-linear stiffness systems with variable preload displacements and constant amplitude decay ratios showed that the energy loss per cycle is dependent on these preload displacements. By introducing a non-linear damping force, which is a function of both displacement and velocity, the associated work per cycle can be made approximately the same function of the preload displacement as is the case for the energy loss. In this manner, it becomes possible to make the resulting damping coefficient essentially independent of the preload displacement. This new d
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Morozumi, Yukio, Masahiko Okumura, Toshiyuki Sawa, and Kengo Kuwaki. "The Load Factor and Permanent Set at the Bearing Surfaces in Hollow Cylindrical Bolted Joints Under External Axial Loads." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63257.

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High strength bolts are utilized widely for high reliability and to reduce the weight of the bolted joints. The usage of the high strength bolts may increase the contact stress at the bearing surfaces. When a bolted joint is under external axial load W, the axial bolt force increases by Ft and the contact stress increases at the bearing surface. This may cause the plastic deformation and a decrease in the axial bolt force. Consequently, it is important to determine the initial axial bolt force (bolt preload) considering external load. In this paper, (load factor) Φ = (Ft/W) is investigated by
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