Relevant bibliographies by topics / Breakaway torque

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Breakaway torque'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

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Journal articles on the topic "Breakaway torque"

1

Graham, Aaron K., Daniel P. Hess, and Heidi M. Stephens. "Screw Loosening in an In Vitro Mid Fibular Osteotomy Model under Dynamic Loading Conditions." Foot & Ankle International 21, no. 10 (2000): 849–51. http://dx.doi.org/10.1177/107110070002101009.

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The purpose of this study was to evaluate the effect of cyclic loading on screw fixation in an experimental bone plating model. The test specimens consist of plated porcine fibulae subjected to cyclic compressive, bending and torsional loading. Breakaway torque measurements of orthopedic screws are found to be significantly less than the screws tightening torque. The breakaway torque for a given screw and tapped bone hole is found to be consistent after repeated tightening, and is proposed as a viable approach to quantify bone screw loosening. After cyclic loading at moderate levels no screw l
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Nassar, Sayed A., and Xianjie Yang. "Novel Formulation of the Tightening and Breakaway Torque Components in Threaded Fasteners." Journal of Pressure Vessel Technology 129, no. 4 (2006): 653–63. http://dx.doi.org/10.1115/1.2767354.

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New formulas are developed for the torque-tension relationship, various torque components, and breakaway torque values in threaded fastener applications. The three-dimensional aspects of the lead helix and thread profile angles and the kinetic and static friction coefficients are all taken into account. Two scenarios of the contact pressure between threads and under the turning fastener head are considered, namely, uniformly distributed and linearly distributed contact pressure scenarios. The effect of thread pitch, lead helix and thread profile angles, friction coefficients, and fastener geom
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Scola, Alexander, Florian Gebhard, Sebastian Weckbach, et al. "Mechanical Quantification of Local Bone Quality in the Humeral Head: A Feasibility Study." Open Orthopaedics Journal 7, no. 1 (2013): 172–76. http://dx.doi.org/10.2174/1874325001307010172.

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Objectives: Surgical treatment of proximal humerus fractures can be challenging due to osteoporosis. The weak bone stock makes stable implant anchorage difficult, which can result in low primary stability. Accordingly, significant failure rates, even with modern locking plates, are reported in the literature. Intraoperative knowledge of local bone quality could be helpful in improving results. This study evaluates the feasibility of local bone quality quantification using breakaway torque measurements. Materials and Methods: A torque measurement tool (DensiProbe™) was developed to determine lo
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Bastian, Johannes Dominik, Mathias Bergmann, Ronald Schwyn, Marius Johann Baptist Keel, and Lorin Michael Benneker. "Assessment of the Breakaway Torque at the Posterior Pelvic Ring in Human Cadavers." Journal of Investigative Surgery 28, no. 6 (2015): 328–33. http://dx.doi.org/10.3109/08941939.2015.1016249.

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Kozik, T. J., J. E. Lowell, and A. Ertas. "Upper Ball Joint Force Variations due to Riser Tensioner and Vessel Motions—Part I: Derivation of General Equations." Journal of Energy Resources Technology 112, no. 3 (1990): 188–99. http://dx.doi.org/10.1115/1.2905757.

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General equation for the tensioner cable forces and for the forces exerted on the riser upper ball joint by the ship joint-tensioner system are derived. An analysis of the variation of forces acting on the upper ball joint of a riser string due to drill ship motion and riser tensioner dynamic has been conducted. The analysis includes the effect of breakaway torque on the tensioner sheaves while assuming vessel and upper ball joint motion to be independent.
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Kozik, T. J., J. E. Lowell, and A. Ertas. "Upper Ball Joint Force Variations due to Riser Tensioner and Vessel Motions—Part II: Analysis and Computer Simulation." Journal of Energy Resources Technology 112, no. 3 (1990): 200–207. http://dx.doi.org/10.1115/1.2905758.

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An analysis of the variation of forces acting on the upper ball joint of a riser string due to the drill ship motion and riser tensioner dynamic has been conducted. The analysis includes the effect of breakaway torque on the tensioner sheaves while assuming vessel and upper ball joint motion to be independent. General equation for the tensioner cable forces and for the forces exerted on the riser upper ball joint by the ship joint-tensioner system derived in Part I are solved. The variation in the tensioner cable forces is compared to data generated in field operation.
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Manoj Kumar, A. P., and Nayak S. Nagaraj. "Calculation of Friction Coefficients in Journal Bearings to Determine the Turning Gear Motor Power." Applied Mechanics and Materials 232 (November 2012): 869–73. http://dx.doi.org/10.4028/www.scientific.net/amm.232.869.

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Steam turbine turning gear is a gear train, driven by electric motor, which is used to drive the rotor at a given speed and capable of breaking away the turbine and its load equipment from a standstill. Steam turbine rotor trains are supported by journal bearing which require lube oil for cooling. The normal turning gear operation requires that lube oil and the lift oil systems must be in-service in order to reduce the friction coefficient at the journal bearings during breakaway. The rotor train breakaway and running torque is the resisting moments at each of the journal bearings. The resisti
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Konuhova, M., E. Kamolins, S. Orlova, A. Suleiko, and R. Otankis. "Optimisation of Permanent Magnets of Bioreactor Magnetic Coupling while Preserving their Efficiency." Latvian Journal of Physics and Technical Sciences 56, no. 4 (2019): 38–48. http://dx.doi.org/10.2478/lpts-2019-0023.

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Abstract The paper discusses issues related to the optimisation of magnetic couplings used in bioreactors (manufactured by JSC “Biotehniskais Centrs”). The purpose of optimisation was to preserve the maximum breakaway torque of the magnetic coupling while reducing the mass of rare earth elements used in its structure. The paper presents the rationale for the selected optimisation option taking into account the economic aspect. To solve the optimisation problem, the factors affecting the maximum torque of the magnetic coupling, such as the shape and height of the internal and external magnets,
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Syzrantsev, V. N., E. Y. Moskvina, and L. A. Chernaya. "A Method of Profile Modification of the Tooth Surface of Semi-Rolled Pan Gear." Proceedings of Higher Educational Institutions. Маchine Building, no. 05 (722) (May 2020): 32–40. http://dx.doi.org/10.18698/0536-1044-2020-5-32-40.

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The use of drives based on pan precession gears with a small shaft angle in which multiple-tooth meshing is implemented significantly increases the efficiency and transmitted torque in oil and gas equipment. It also and reduces the breakaway torque by almost an order in comparison with worm gears. The production of pan gears in the semi-rolled version significantly simplifies tooth cutting technology. To exclude the possibility of edge contact of the teeth coming into meshing due to their contact and bending deformations, it is necessary to carry out profile correction of the teeth. To address
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De Agostinis, M., S. Fini, and G. Olmi. "The influence of lubrication on the frictional characteristics of threaded joints for planetary gearboxes." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, no. 15 (2016): 2553–63. http://dx.doi.org/10.1177/0954406215605863.

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Planetary gearboxes generally consist of a ring gear, or gear body, connected with the input and output flanges by means of several screws, equally spaced along the diameter. The ring gear is manufactured with steel, whereas the flanges are usually made of cast iron. These screws must provide axial preload between the parts, allowing the assembly withstanding the breakaway torque given by the difference between the output and input torque applied to the gearbox. For a given screw geometry, the axial preload can be calculated, provided that the friction coefficients in the thread and in the und
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Dissertations / Theses on the topic "Breakaway torque"

1

Hunter, Ryan. "Direct Verification of the Locking of Liquid Locking Compounds in Threaded Fasteners." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4081.

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The motivation of this research is to explore the viability of a method to directly verify whether or not an anaerobic adhesive within a threaded fastener assembly has cured sufficiently to provide secondary locking. Direct verification was implemented via the application of a test torque in the loosening direction of a fastener assembly with Loctite (given a 24 hour cure time). A three phase test plan was developed with the intent of identifying and utilizing this verification torque value which is unique to a given fastener assembly. It was proved that the direct verification method, as outl
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Conference papers on the topic "Breakaway torque"

1

Nassar, Sayed A., and Xianjie Yang. "Novel Formulation of the Tightening and Breakaway Torque Components in Threaded Fasteners." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93175.

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New formulas are developed for the torque-tension relationship, various torque components, and for the break-away torque values in threaded fastener applications. The 3-D aspects of the lead helix and thread profile angles, the kinetic and static friction coefficients are all taken into account. Two scenarios of the contact pressure between threads and under the turning fastener head are considered; namely, uniform distributed and linearly distributed contact pressure scenarios. The effect of thread pitch, lead helix and thread profile angles, friction coefficients, and the fastener geometry i
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Nassar, Sayed A., and Xianjie Yang. "Torque-Angle Formulation of Threaded Fastener Tightening." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-16150.

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In this paper, the evolution equations of the bearing and thread friction coefficients are proposed based on mechanical behavior of the bolted joint assembly. The formulation of the torque-tension relationship during tightening and loosening is experimentally validated. The study shows excellent correlation between the proposed model and the experimental results for the breakaway torque values in both the tightening and loosening directions. Evaluation of the torque-angle control of the tightening process is made, and a modified torque-angle control approach is proposed. The effect of friction
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Achten, Peter, Jeroen Potma, and Jasper Achten. "Low Speed Performance of Axial Piston Machines." In BATH/ASME 2018 Symposium on Fluid Power and Motion Control. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/fpmc2018-8832.

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Low speed operation of axial piston motors has always been a critical performance issue. The breakaway torque determines the capacity of a motor to move a certain load from standstill conditions. In addition, the low speed performance has also become a critical performance parameter for pumps being applied in frequency controlled electro-hydraulic actuators. Yet, there is almost no information available about the low speed and breakaway characteristics of piston pumps and motors. A new test bench has been constructed to measure these characteristics [1]. The new bench allows operation of hydro
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Nassar, Sayed A., Saravanan Ganeshmurthy, and Xianjie Yang. "Kinetic Versus Static Frictional Torque Components in Threaded Fastener Applications." In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-15959.

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This paper investigates the kinetic and static frictional torque components in threaded fasteners during the initial fastener tightening, subsequent torque audit, as well as during the loosening of previously tightened bolts. In less critical applications, the peak kinetic torque value is often used for predicting the bolt preload. The peak value of the tightening torque and its frictional components are mainly determined by the kinetic friction coefficients between the engaged threads and between the rotating nut (or head) and the joint surface. During subsequent quality inspection of the joi
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Casper, R. L., and R. B. Spector. "The LM6000 Gas Turbine as a Mechanical Drive Power Source." In ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1992. http://dx.doi.org/10.1115/92-gt-102.

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The LM6000 Gas Turbine was formally introduced at the IGTI Gas Turbine Conference in Brussels in 1990. It was immediately accepted for power generation/cogeneration applications; however, inquiries were received concerning the use of the LM6000 gas turbine for mechanical drive applications. These inquiries included the amount of power available with decreasing gas turbine speed, breakaway torque capability and resonant free operation over a broad speed range. This paper discusses the engineering studies performed to ensure that the LM6000 will be a suitable power source for mechanical drive ap
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Hissam, D. Andy, Mike Leberman, and Rick McLeroy. "Testing and Comparative Evaluation of Space Shuttle Main Engine Flowmeter Bearings." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63299.

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This paper provides a summary of testing of Space Shuttle Main Engine (SSME) flowmeter bearings and cage material. This testing was conducted over a several month period in 2004 at the Marshall Space Flight Center (MSFC). The test program’s primary objective was to compare the performance of bearings using the existing cage material and bearings using a proposed replacement cage material. In order to meet the test objectives for this program, a flowmeter test rig was designed and fabricated to measure both breakaway and running torque for a flowmeter assembly. Other test parameters, such as mo
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Mansir, Hassan, Michael Rimmer, Leon Waldner, et al. "Hybrid Permanent Magnet Motor Application to Electric Submersible Pumps in SAGD wells." In SPE Gulf Coast Section Electric Submersible Pumps Symposium. SPE, 2021. http://dx.doi.org/10.2118/204499-ms.

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Abstract A Permanent Magnet Motor (PMM) designed to break the 300°C barrier was previously presented that included many advancements to greatly improve the operating temperature and reliability beyond the ability of current equipment [1]. A key design element is the inclusion of a squirrel cage in the PMM rotor that results in a hybrid construction. This paper will delve into the rationale for the hybrid configuration and will assess motor performance using electromagnetic simulations and validation testing. PMMs are used in many industrial applications and have recently started to gain tracti
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Jo, Jong Chull, Myung Jo Jhung, Seon Oh Yu, Hho Jung Kim, and Young Gill Yune. "Root Cause Analysis of SI Nozzle Thermal Sleeve Breakaway Failures Occurred at PWR Plants." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93497.

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Thermal sleeves in the shape of thin wall cylinder seated inside the nozzle part of each safety injection (SI) line at pressurized water reactors (PWRs) have such functions as prevention and relief of potential excessive transient thermal stress in the wall of SI line nozzle part which is initially heated up with hot water flowing in the primary coolant piping system when cold water is injected into the system through the SI nozzles during the SI operation. Recently, mechanical failures that the sleeves are separated from the SI branch pipe and fall into the connected cold leg main pipe occurr
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