Relevant bibliographies by topics / Torsion torque

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

Academic literature on the topic 'Torsion torque'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 February 2022

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Journal articles on the topic "Torsion torque"

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Shen, Kongjian, Shui Wan, YL Mo, and Xiayuan Li. "A softened membrane model for prestressed concrete composite box girders with corrugated steel webs under pure torsion." Advances in Structural Engineering 22, no. 2 (August 3, 2018): 384–401. http://dx.doi.org/10.1177/1369433218788597.

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Torsion can be regarded as a principal factor in some cases, such as in curved girders and eccentrically loaded girders, when conducting the structural analysis of prestressed concrete composite box girders with corrugated steel webs. Recently, a rational model, called the softened membrane model for torsion, was proposed for the torsional analysis of reinforced concrete members; thereafter, this model was extended to prestressed concrete members under pure torsion and called softened membrane model for torsion prestressed concrete. This article presents a modified model, the softened membrane model for torsion prestressed concrete for prestressed concrete composite box girders with corrugated steel webs, to analyze full torsional behavior. To build the model, the softened membrane model for torsion in reinforced concrete members is first extended to perform the torsional analysis of prestressed concrete composite box girders with corrugated steel webs by incorporating the torsional contribution of corrugated steel webs. Afterward, the initial stresses and strains due to prestressing are considered to extend the softened membrane model for torsion to softened membrane model for torsion prestressed concrete for prestressed concrete composite box girders with corrugated steel webs by modifying the equilibrium equations, convergence criteria, and constitutive laws of materials. The modified model is validated by experimental data and is proven to be capable of predicting the overall torque–twist curve, especially the precracked branch and postcracked ascending branch. In addition, a comparison between the softened membrane model for torsion and softened membrane model for torsion prestressed concrete indicates that the torque values before and after concrete cracking will be overestimated and underestimated, respectively, without considering the effect of the initial stresses and strains. Finally, another comparison shows that the softened membrane model for torsion prestressed concrete is superior to the rotating-angle truss model for torsion in its ability to predict the precracked branch of the torque–twist curve.
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Ludwig, Oliver, Jens Kelm, and Sascha Hopp. "Impact of Quadriceps/Hamstrings Torque Ratio on Three-Dimensional Pelvic Posture and Clinical Pubic Symphysis Pain-Preliminary Results in Healthy Young Male Athletes." Applied Sciences 10, no. 15 (July 29, 2020): 5215. http://dx.doi.org/10.3390/app10155215.

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Pain in the pubic symphysis is of significance, especially in high-performance sports. Pelvic torsion, possibly caused by muscular imbalances, is discussed as a pathogenic mechanism. This study examined a possible interrelationship between the maximum torques of quadriceps femoris and hamstrings and the spatial positioning of the hemi-pelvises, as well as the tenderness to palpation of the pubic symphysis. The three-dimensional pelvic contour of 26 pain free adolescents (age 16.0 ± 0.8 years, weight 66.3 ± 9.9 kg, height 176.2 ± 6.0 cm) was registered by means of an 3D optical system and the torsion of both hemi-pelvises against each other was calculated based on a simplified geometrical model. Tenderness on palpation of the pubic symphysis was assessed by means of a visual analogue scale, and isometric torques of knee extensors and flexors were measured for both legs. The torque ratio between knee extensors and flexors was calculated for both sides, as was the crossed torque ratio between the two legs. On the basis of a MANOVA, possible significant differences in torques and torque ratios between subgroups with lower and higher pelvic torsion were analyzed. The crossed torque ratio (F = 19.55, p < 0.001, partial η2 = 0.453) and the tenderness to palpation of the pubic symphysis (F = 10.72, p = 0.003, partial η2 = 0.309) were significantly higher in the subgroup with higher pelvic torsion. The results indicate the crossed torque ratio of knee flexors and extensors as a potential biomechanical-pathogenic mechanism to be considered in the primary prevention and diagnosis of symphyseal pain.
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Aghili, Farhad, Martin Buehler, and John M. Hollerbach. "Sensing the Torque in a Robot’s Joints." Mechanical Engineering 120, no. 09 (September 1, 1998): 66–69. http://dx.doi.org/10.1115/1.1998-sep-2.

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This article describes design specifications of a new sensor that can accurately measure the torsion moment in a direct-drive robot, even in the presence of strong overhang, thrust forces, and bending moments. Introducing a torque sensor into a robot joint adds flexibility. Although torsional flexibility can be compensated for by sophisticated controllers, deflection in the other axes is more problematic. Consequently, another design criterion dictates high stiffness in non-torsional directions. The sensor design must optimize, and trade off among several conflicting design criteria. Also, many design iterations are required to arrive at a final design. Despite this complexity, it is possible to arrive at a novel basic sensor design. Thin-section rectangular bars experience high stress/ strain concentrations under torsion loads, which yield high sensitivity without sacrificing stiffness. This fact suggests that an appropriate structure should be primarily stressed by torsion. The team used the finite element analysis (FEA) capabilities of I-DEAS from Structural Dynamics Research Corp. to finalize the dimensions so that performance would be optimized. FEA was also used to select the location and proper size of the strain gauges.
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Hu, Shao Wei, and Ke Yu Zhao. "Experimental Research on Torsional Performance of Prestressed Composite Box Beam with Partial Shear Connection." Applied Mechanics and Materials 438-439 (October 2013): 658–62. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.658.

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In order to research torsional performance of prestressed steel-concrete composite box beam with different shear connection, this paper designed three prestressed steel-concrete composite box beams with different degree of shear connection, and studied the stress characteristics of prestressed composite beam under static torsion process load. The torsion behaviors of prestressed composite beam such as the steel strain, concrete flange strain, rebar strain, angle of torsion, deformation and failure patterns are analyzed on the base of the experimental results. It comes to a result that shear connectors have little impact on beams cracking torque, but ultimate torque of composite beams decreases along with the reduction of shear connection degree. When the shear connection degree is 0.5, the ultimate torque is reduced by about 15%.
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Ma, Jie, Lu Bai, and Michelle D. Wang. "Transcription Under Torsion." Science 340, no. 6140 (June 27, 2013): 1580–83. http://dx.doi.org/10.1126/science.1235441.

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In cells, RNA polymerase (RNAP) must transcribe supercoiled DNA, whose torsional state is constantly changing, but how RNAP deals with DNA supercoiling remains elusive. We report direct measurements of individual Escherichia coli RNAPs as they transcribed supercoiled DNA. We found that a resisting torque slowed RNAP and increased its pause frequency and duration. RNAP was able to generate 11 ± 4 piconewton-nanometers (mean ± standard deviation) of torque before stalling, an amount sufficient to melt DNA of arbitrary sequence and establish RNAP as a more potent torsional motor than previously known. A stalled RNAP was able to resume transcription upon torque relaxation, and transcribing RNAP was resilient to transient torque fluctuations. These results provide a quantitative framework for understanding how dynamic modification of DNA supercoiling regulates transcription.
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Song, Bao, Hui Wang, Weihua Cui, Hui Liu, and Tingshuai Yang. "Distributions of stress and deformation in a braided wire rope subjected to torsional loading." Journal of Strain Analysis for Engineering Design 54, no. 1 (September 20, 2018): 3–12. http://dx.doi.org/10.1177/0309324718800814.

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Braided wire rope is vital for stringing conductors with tension in overhead transmission lines. Its structure and characteristics determine the safety and reliability of the stringing construction. Torque generated in this process can cause an uneven stress distribution, ultimately causing the wire rope to fail. This study analyzes distributions of stress and deformation in braided wire rope subjected to torsional loading. A geometric model for YS9-8 × 19 braided wire rope was established, and finite element analysis was performed on the model in different twisting directions. The simulation results show that the wires in the strands have the tendency to be screwed tightly and are in a stretched state when the lay direction of the strand coincides with its torsion direction. However, when the lay and torsion directions are opposite, the wires in the strands tend to unwind and are in a compressed state. At the same torsional angle, different torques can be generated at a particular cross-section along different twisting directions. This shows that braided wire rope has better anti-twist characteristics when twisted clockwise compared to when twisted anticlockwise. Finally, a torsion test was conducted on the braided wire rope. The results show that the change in the torque curve with respect to the torsional angle is in good agreement with the simulation results.
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Xu, Dong Qiang, and Mei Mei He. "Seismic Performance Analysis of the Special-Shaped Frame Column Structure on Multi-Dimensional Seismic." Applied Mechanics and Materials 90-93 (September 2011): 1644–48. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.1644.

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The article considers the two horizontal components of ground motion and torsional component, to do nonlinear time history analysis both on regular and irregular shaped column frame structure models. The results show that torsional component of ground motion haves some impact on torsion reaction of structures, stiffness of irregular shaped column frame structure is uneven, and angle of columns are greater than that of the regular structure; torsion haves some impact on the torque of structure, the torque increases of corner columns is maximum, so corner columns are weak links in shaped column structure, considered fully during the seismic design.
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Franco, Érika Mendonça Fernandes, Fabrício Pinelli Valarelli, João Batista Fernandes, Rodrigo Hermont Cançado, and Karina Maria Salvatore de Freitas. "Comparative study of torque expression among active and passive self-ligating and conventional brackets." Dental Press Journal of Orthodontics 20, no. 6 (December 2015): 68–74. http://dx.doi.org/10.1590/2177-6709.20.6.068-074.oar.

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Abstract Objective: The aim of this study was to compare torque expression in active and passive self-ligating and conventional brackets. Methods: A total of 300 segments of stainless steel wire 0.019 x 0.025-in and six different brands of brackets (Damon 3MX, Portia, In-Ovation R, Bioquick, Roth SLI and Roth Max) were used. Torque moments were measured at 12°, 24°, 36° and 48°, using a wire torsion device associated with a universal testing machine. The data obtained were compared by analysis of variance followed by Tukey test for multiple comparisons. Regression analysis was performed by the least-squares method to generate the mathematical equation of the optimal curve for each brand of bracket. Results: Statistically significant differences were observed in the expression of torque among all evaluated bracket brands in all evaluated torsions (p < 0.05). It was found that Bioquick presented the lowest torque expression in all tested torsions; in contrast, Damon 3MX bracket presented the highest torque expression up to 36° torsion. Conclusions: The connection system between wire/bracket (active, passive self-ligating or conventional with elastic ligature) seems not to interfere in the final torque expression, the latter being probably dependent on the interaction between the wire and the bracket chosen for orthodontic mechanics.
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Li, Junqiu, Yihe Wang, and Yizheng Wang. "Optimal control for jitter suppression of clutch engagement in upshift process of electric vehicles." Advances in Mechanical Engineering 8, no. 12 (December 2016): 168781401667484. http://dx.doi.org/10.1177/1687814016674847.

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In the shift process of large-order automatic transmission, jitter phenomenon is common in clutch engagement process, which greatly affects the ride comfort of the vehicle. In this article, the jitter dynamic model of clutch engagement process was established with lumped mass method and virtual displacement principle. Specific to clutch engagement stage, the optimal control of the coordination between driving motor and wet clutch was studied. In accordance with the jitter dynamic model, the state–space equation with controlling variables of motor torque and clutch friction torque was established. In this optimization problem, the torsion angle, torsion angular velocity, and shift jerk are selected as optimization targets. Utilizing the linear quadratic optimal control theory, the optimal trajectory of motor torque and clutch friction torque was obtained. Aiming at the dynamic responses in clutch engagement process, the optimal control in different conditions of weight coefficients, initial torsion angles, and resistance torques was studied. Results showed that the optimal control strategy could obviously reduce the jitter; in addition, the weight coefficient should be determined according to actual situation reasonably.
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Moens, N. M. M., J. Runciman, G. Monteith, and S. Gordon. "The effect of the combination of locking screws and non-locking screws on the torsional properties of a locking-plate construct." Veterinary and Comparative Orthopaedics and Traumatology 23, no. 01 (2010): 7–13. http://dx.doi.org/10.3415/vcot-09-05-0055.

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SummaryLittle is known about the torsional properties of bone-plate constructs when a combination of locking and non-locking screws have been used. Sixty cadaveric canine femurs were divided into three groups. In the first group, the plate was affixed using three non-locking screws. In the second group, only locking screws were used while a combination of one locking and two non-locking screws were used in the third group. All constructs were subjected to torsion until failure. Torque, angle of torsion, and work were all calculated at the maximum failure point, as well as at five degrees of plastic deformation, which was thought to be more representative of clinical failure. At the maximum failure point, the locking group had significantly higher torque, angle, and work values than the non-locking group. The combination group was intermediate to the two other groups, and significantly differed from the non-locking group in torque, and from the locking group in work. At five degrees of plastic deformation, the locking group required significantly higher torque and work than the non-locking group. The combination group required a significantly higher torque than the non-locking group. This study suggests that a construct composed of all locking screws will fail at a greater torque value, and sustain greater work to failure in torsion compared to a construct composed of all non-locking screws. The addition of a single locking screw to an otherwise non-locking construct will increase the torque at the offset failure point and may be of clinical value in constructs subjected to high torsional loads.
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Dissertations / Theses on the topic "Torsion torque"

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Moore, Michael Wayne. "Measuring the second harmonic amplitude of an oscillating torsion pendulum to detect small forces /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/9666.

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Hanekom, Alwyn Nicolaas. "A torque ripple analysis on reluctance synchronous machines." Thesis, Cape Peninsula University of Technology, 2006. http://hdl.handle.net/20.500.11838/1145.

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Thesis MTech(Electrical Engineering))--Cape Peninsula University of Technology, 2006
Reluctance Synchronous Machines (RSM) have, due to their rotor geometry, an inherently high torque ripple. This torque ripple is defined as the deviation of the minimum and maximum torque from the average value. It is unwanted as it indicates uneven pull on the rotor causing deformation of it and hence different air-gaps along the rotor circumference as well as acoustic noise. In applications such as power steering, robotics and radar positioning systems where high precision movement is vital, oscillating torque will lead to the malfunction of these devices and therefore suppressed the use and development of RSMs. Unlike the Induction machine (IM), the RSM has no copper losses in the rotor, which reduces the operating temperature significantly. With the development of electronic drives the quality of the output torque could be improved by means of accurate current- and flux space phasor control methods with much success and made the RSM a possible replacement for the IM. However, reducing torque ripple by means of purely geometrical changes is still a challenge to the machine designer. This thesis will focus on the reduction of torque ripple while leaving the average torque relatively unchanged by changing the rotor geometry. The rotor changes will take place by means of flux barriers and cut-outs while the stator has either semi-closed slots or magnetic wedges. In this work rotor structures with equal harmonic magnitudes but their angles 1800 apart. will be combined to form one machine and identify how torque harmonics respond. The change in average torque and power factor will be evaluated with all geometrical changes made to these machines throughout this work.
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Hussain, Hyder. "Torsion fatigue system for mechanical characterization of materials." Ohio : Ohio University, 2000. http://www.ohiolink.edu/etd/view.cgi?ohiou1172002877.

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Taylor, Brian. "The design of a lathe attachment for grinding non-circular cross- section shafts suitable for torque transmission." Thesis, University of Newcastle Upon Tyne, 1987. http://hdl.handle.net/10443/769.

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The principle concern of this work is the design of a lathe attachment for grinding non-circular 'polygonal' shaped workpieces suitable for use as torque transmitting machine elements. In the course of the work substantial attention is also given to the general theory and development of computer aided error analysis procedures for planar linkage mechanisms. A further smaller part of the work investigates the torsion of polygonal shafts. The non-circular shapes considered here may be loosely defined as polygonal profiles. Their application is in torque transmitting couplings for which they represent an alternative to keyed and splined couplings, although, in comparison to keys and splines, their application has been limited, mainly due to the specialised nature of their manufacture. The main objective of this work is to investigate suitable profiles and the means for their production using an attachment which can be mounted on a conventional machine tool, such as a lathe or grinding machine. The work progresses from initial consideration of shapes produced by various geometric generating methods and conception of an 'ideal' profile generating linkage mechanism through to detailed design of a precision, polygonal profile grinding, lathe attachment, and final assessment of its feasibility based on a profile precision criterion. In order to assess the precision of the attachment, computer-aided procedures are developed, after consideration of existing error analysis methods and their limitations for use in this case. These consider the various effects of tolerances, clearances and deflections upon mechanism output. As a coincidental investigation, the mechanical behaviour and strength of polygonal shaft-hub connections is reported. In particular, the torsion of a polygonal bar is theoretically analysed, using a stress function method, to determine maximum shear stresses.
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Fox, Gordon R. "Joining of Shape-Memory NiTi Torque Tubes to Structural Materials." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1331157030.

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Patel, Vinit A. "Biomechanical Evaluation Of Locked and Non-locked Constructs Under Axial And Torsion Loading." Wright State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=wright1228776190.

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Malchárek, Miroslav. "Měření torzní tuhosti vozidla s využitím 3D scanneru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231528.

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This thesis deals with the measurement of the torsional stiffness of the frame using Tritop system. There is described development of the frame due to the complexity of torsional stiffness. Further there is outlined a brief overview of the types of measurement and the effect of torsional stiffness on the driving behavior of the vehicle. The aim of the work is to develop a method for measuring torsional stiffness of the vehicle Formula Student and from the results of repeated measurements to assess the accuracy and repeatability of measurements.
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Diemer, Franck. "Utilisation en rotation continue des instruments de préparation canalaire en nickel-titane : évaluation des contraintes." Toulouse 3, 2006. http://www.theses.fr/2006TOU30283.

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The first part of this work exposes a bibliographical synthesis about properties of memory-shape alloys and the characteristics of the small electric motors. The second part is experimental. We compared the resistance of instruments characterized by different profiles. We measured the differences induced by profile and pitch length on stresses generated by endodontic instrument used in continuous rotation. Then we try to evaluate the conditions of disengaging of different electric motors and contra-angles. We finally use, with a torque control motor, a file with the tip maintained in a screw-locking device. These studies show the role of instrument profile. Regarding the safe use of files, it appears more effective to work on the instruments design than to use controlled torque motor which are far away from manufacturers’ specifications. The use of badly calibrated disengaging or coupled to reversed rotation is completely ineffective.
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Ehlers, Hendrik Petrus. "Lag screw effect on the biomechanical torsion stability in the I.S.I monocortical mandible angle system." Diss., University of Pretoria, 2010. http://hdl.handle.net/2263/30368.

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In a recent in vitro biomechanical stability study by F.J. Jacobs, a unique, patented inclined screw insertion (I.S.I.) mandibular angle, intra-oral trauma-plate was evaluated for torsion and compression stability and compared to conventional plating of simulated angle fractures in polyurethane mandibular replicas. This in vitro comparative pilot study is an extension of the above-mentioned study. Similar I.S.I. mini-plates with 45º inclined screw holes in quadrant 3 (Fig 1), were used but in the one sample 13mm-long lag screws were used to transect the fracture lines where in the other group non-lagging screws of similar length were used to fixate simulated mandibular angle fractures in polyurethane mandible replicas. A uniquely designed and manufactured jig, incorporated in a Zwick machine, was utilized to apply torsion forces within clinical relevant load values. The load-displacement values for torsion forces was determined and compared for the two groups. It was established that 5 lag screws significantly improved the torsion stability of the lag-plate group to that of the non-lag group. During the stability testing, two factors were identified, which had a critical influence on the compression generated by the lag screw between the fracture fragments. An adequate amount of bone must be maintained between the first screw hole, directly distal to the fracture line, and the fracture line. All screws must be inserted in the correct sequence in order to insure sufficient compression between the fracture fragments as a result of the lag-effect. AFRIKAANS : In `n onlangse in vitro studie deur F.J. Jacobs, is `n gepatenteerde, unieke geanguleerde miniplate, waarvan die skroefgate geanguleer is, die sg. Inklineerde Skroef Inplasing (I.S.I.) kaak-hoek, intra-orale traumaplaat geevalueer vir torsie en kompressie stabiliteit en vergelyk met konvensionele plate op gesimuleerde kaakhoek frakture in poli-uretaan mandibular replikas. In hierdie in vitro loodstudie, is I.S.I. miniplate met skroefgate wat teen 45º geanguleer is, gebruik in kombinasie met `n enkele 13mm lange grypskroef (“lag screw”) om gesimuleerde kaakhoek frakture in poli-uretaan mandibula replikas te fikseer. Deur gebruik te maak van `n spesiaal ontwerpte en vervaardigde monterings-apparaat wat binne in `n Zwick masjien geïnkorporeer word, is die I.S.I gefikseerde replikas onderwerp aan torsie kragte, binne klinies relevante ladingswaardes. Die verplasings en ladingswaardes is geregistreer en vergelyk met identiese I.S.I miniplate sonder `n grypskroef. Die loodstudie resultate het getoon dat die frakture wat gefikseerd is met die I.S.I. miniplaat-grypskroef kombinasie betekenisvol beter stabiliteit toon as die frakture wat met slegs die miniplaat, sonder `n grypskroef, gefikseerd is vir klinies relevante ladingsen verplasingswaardes. Tydens biomeganiese toetsing van die mandibula replikas, is twee faktore wat `n kardinale rol speel in die stabiliteit wat verkry word deur `n miniplaat grypskroef kombinasie te gebruik, geïdentifiseer. Voldoende hoeveelheid been tussen die eerste skroefgat, direk distaal van die fraktuurlyn, en die fraktuurlyn asook die korrekte volgorde waarin die skroewe geplaas word, moet gehandhaaf word om maksimale kompressie van die fragmente deur die grypskroef te verseker. Deur `n I.S.I miniplaat, met geanguleerde skroefgate van 45º, te kombineer met `n grypskroef, kan die stabiliteit van die gefikseerde mandibulere kaakhoek betekenisvol verbeter word en verleen dit meer stabiliteit wanneer vergelyk word met frakture gereduseer met `n I.S.I miniplaat sonder grypskroef plasing.
Dissertation (MSc)--University of Pretoria, 2010.
Maxillo-Facial and Oral Surgery
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Liu, Bingxiao. "Laplacien hypoelliptique et formule des traces tordue." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS165/document.

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Dans cette thèse, on donne une formule géométrique explicite pour les intégrales orbitales semisimples tordues du noyau de la chaleur sur un espace symétrique, en utilisant la méthode du laplacien hypoelliptique développée par Bismut. On montre que nos résultats sont compatibles avec les résultats classiques de la théorie de l'indice équivariant local sur les espaces localement symétriques compacts. On utilise notre formule explicite pour évaluer le terme dominant dans l'asymptotique quand d -> + ∞ de la torsion analytique équivariante de Ray-Singer associée à une famille de fibrés vectoriels plats Fd sur un espace localement symétrique compact. On montre que le terme dominant peut être calculé à l'aide de W-invariants au sens de Bismut-Ma-Zhang
In this thesis, we give an explicit geometric formula for the twisted semisimple orbital integrals associated with the heat kernel on symmetric spaces. For that purpose, we use the method of the hypoelliptic Laplacian developed by Bismut. We show that our results are compatible with classical results in local equivariant index theory. We also use this formula to evaluate the leading term of the asymptotics as d -> + ∞ of the equivariant Ray-Singer analytic torsion associated with a sequence of flat vector bundles Fd on a compact locally symmetric space. We show that the leading term can be evaluated in terms of the W-invariants constructed by Bismut-Ma-Zhang
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Books on the topic "Torsion torque"

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Swanson, William J. Determination of diesel engine cylinder gas torques from speed fluctuations with a high-fidelity crankshaft torsional model. Monterey, Calif: Naval Postgraduate School, 1998.

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Melendy, Robert F. Noncontact measurement of shaft torsional displacements by optical means. 1994.

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Determination of Diesel Engine Cylinder Gas Torques from Speed Fluctuations with A High-Fidelity Crankshaft Torsional Model. Storming Media, 1998.

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Book chapters on the topic "Torsion torque"

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Köhler, Kai. "Complex Analytic Torsion Forms for Torus Fibrations and Moduli Spaces." In Regulators in Analysis, Geometry and Number Theory, 167–95. Boston, MA: Birkhäuser Boston, 2000. http://dx.doi.org/10.1007/978-1-4612-1314-7_7.

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Voisin, Claire. "Torsion Points of Sections of Lagrangian Torus Fibrations and the Chow Ring of Hyper-Kähler Manifolds." In Geometry of Moduli, 295–326. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-94881-2_10.

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Zhang, Feng, Pengfei Wang, Xin Huang, and Xuelian Bai. "Research on the Influence of the Torsional Elastic Torque on Chaotic Characters of the Permanent Magnet Synchronous Motor System." In The Proceedings of the 9th Frontier Academic Forum of Electrical Engineering, 453–61. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6609-1_40.

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"The application of torsion angle method in shaft dynamic torque measurement." In Manufacturing and Engineering Technology (ICMET 2014), 121–26. CRC Press, 2014. http://dx.doi.org/10.1201/b17735-25.

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Pumhössel, T. "Reducing torsional vibrations of drivetrains using impulsive torques mimicking periodic elastic impacts." In Schwingungen 2019, 333–42. VDI Verlag, 2017. http://dx.doi.org/10.51202/9783181023662-333.

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Gu, Yu-Jiong, and Dong-Chao Chen. "Real-time estimation of torsional torque history in turbo-generator shafts due to Subsynchronous Oscillation." In Environment, Energy and Sustainable Development, 1013–16. CRC Press, 2013. http://dx.doi.org/10.1201/b16320-208.

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Conference papers on the topic "Torsion torque"

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Kawai, Yusuke, Sora Nagao, Yuki Yokokura, Kiyoshi Ohishi, and Toshimasa Miyazaki. "Quick Torsion Torque Control Based on Model Error Compensator and Disturbance Observer with Torsion Torque Sensor." In 2021 IEEE/SICE International Symposium on System Integration (SII). IEEE, 2021. http://dx.doi.org/10.1109/ieeeconf49454.2021.9382617.

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Kawai, Yusuke, Yuki Yokokura, Kiyoshi Ohishi, Kotaro Saito, and Atsushi Shimamoto. "High back-drivable pseudo I-PD torque control using load-side torque observer with torsion torque sensor." In 2016 IEEE 14th International Workshop on Advanced Motion Control (AMC). IEEE, 2016. http://dx.doi.org/10.1109/amc.2016.7496345.

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den Haan, Joost, and Martijn P. M. Krutzen. "Abandon and Recovery Wire Rope Torsion Prediction." In 25th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2006. http://dx.doi.org/10.1115/omae2006-92612.

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Adverse weather conditions during a pipelay operation may be a reason to abandon the pipeline and recover it when weather conditions allow it. The aim of the analysis presented in this paper is to predict the residual torque in steel wire ropes during abandon (pay-out) and recovery (pay-in). The basis of the analysis is the derivation of the stiffness coefficients when torque and tension are coupled by a torque factor. Based on a theoretical model a computer program is written to simulate in an incremental way the torsion in the ropes during pay-in and pay-out. The model includes transport of torsion as well as slip. The calculated residual torque allows for a risk assessment with respect to hockling.
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Moeenfard, Hamid, Farzaneh Kaji, and Mohammad Taghi Ahmadian. "Coupled Bending and Torsion Effects on the Squeezed Film Air Damping in Torsional Micromirrors." In ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/detc2012-70114.

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The current paper presents an analytical model for the problem of squeezed film damping in micromirrors considering the bending of the supporting torsion microbeams. At the first the nonlinear Reynolds equation governing the behavior of the squeezed gas underneath the mirror is linearized. The resulting linearized equation is then nondimensionalized and analytically solved for two cases of the infinitesimal and finite tiling angle of the mirror. The obtained pressure distribution from the solution of the Reynolds equation is then utilized for finding the squeezed film damping force and torque applied to the mirror. The results show that in the case of the infinitesimal tilting angle, the squeezed film damping can be modeled with a linear viscous damping in both torsional and lateral directions. It is also shown that when the mirror’s rotation angle is small, with increasing the length of the mirror, the damping force and damping torque are increased. For the case of the finite tilting angle it was observed that the applied damping torque highly depends on the tilting angle of the mirror as well as the ratio of its vertical to angular velocity and as a result the effect of the vertical velocity of the mirror on the squeezed film damping force and torque applied to the mirror cannot be simply neglected. The results of this paper can be used for accurate dynamical modeling of the micromirrors under the effect of the squeezed film damping.
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Fang, Pan, Yuxin Xu, Shuai Yuan, Yong Bai, and Peng Cheng. "Investigation on Mechanical Properties of Fibreglass Reinforced Flexible Pipes Under Torsion." In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-77354.

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Fibreglass reinforced flexible pipe (FRFP) is regarded as a great alternative to many bonded flexible pipes in the field of oil or gas transportation in shallow water. This paper describes an analysis of the mechanical behavior of FRFP under torsion. The mechanical behavior of FRFP subjected to pure torsion was investigated by experimental, analytical and numerical methods. Firstly, this paper presents experimental studies of three 10-layer FRFP subjected to torsional load. Torque-torsion angle relations were recorded during this test. Then, a theoretical model based on three-dimensional (3D) anisotropic elasticity theory was proposed to study the mechanical behavior of FRFP. In addition, a finite element model (FEM) including reinforced layers and PE layers was used to simulate the torsional load condition in ABAQUS. Torque-torsion angle relations obtained from these three methods agree well with each other, which illustrates the accuracy and reliability of the analytical model and FEM. The impact of fibreglass winding angle, thickness of reinforced layers and radius-thickness ratio were also studied. Conclusions obtained from this research may be of great practicality to manufacturing engineers.
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Mehrabi, Reza, Mahmoud Kadkhodaei, Masood Taheri, and Mohammad Elahinia. "Shape Memory Effect Behavior of NiTi Torque Tubes in Torsion." In ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/smasis2012-8243.

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In order to simulate the torsional behavior of NiTi torque tubes, two different 3D thermo-mechanical constitutive models are utilized. Firstly, an available incremental constitutive model is used in which a return mapping algorithm is implemented to numerically calculate the strains for any applied stresses. Secondly, Microplane theory is employed based on which 1D constitutive laws are considered for associated stress and strain components on any arbitrary plane passing through a material point followed by a homogenization process to generalize the 1D equations to a 3D macroscopic model. Both of the constitutive models are implemented in ABAQUS by developing UMAT. In order to compare the two approaches, torque-angle of rotation and shear stress-shear strain responses for torsion of thin-walled Nitinol torque tubes with different thicknesses are studied. The numerical results of these two approaches show to be in a good agreement indicating the capability of Microplane theory in constitutive modeling of shape memory alloys. This theory provides explicit relationships to calculate strains in terms of stresses, and this makes it very beneficial in obtaining the SMA responses in a fast and easy manner.
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Hirahara, Hiroo, Keita Yoshida, and Masami Iwase. "Torque estimation based on nonlinear engine model considering crankshaft torsion." In 2010 IEEE/ASME International Conference on Advanced Intelligent Mechatronics (AIM). IEEE, 2010. http://dx.doi.org/10.1109/aim.2010.5695893.

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Dettmann, Kai-Uwe, Matthias Marx, Keiwan Kashi, Dirk Nissing, and Dirk So¨ffker. "Concept and Components for Disturbance Decoupling and Energy Harvesting." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-86801.

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This contribution contains the conception, the components modeling, the realization, and first results for active disturbance decoupling including the experimentally checked ability of the concept for energy harvesting. The investigated mechanical structure consists mainly of a torsional spring. At one side of the spring the disturbances (time-dependent torques with varying frequencies) are driven by a position controlled hydraulic cylinder. The other side of the spring is locked and a force sensor is applied. Due to different torsion angles a torque between the left and right side of the torsion spring is induced. To eliminate or at least to reduce the torque in a passive system it is theoretically sufficient to adjust the stiffness of the spring situation-dependent, although this is practically not possible. For that reason an active disturbance control is presented here. The torque of the spring has to be controlled independently of the displacements at the right and left side. This sophisticated strategy is described in the following. In this contribution the concept and realization of a new active mechanism is realized by dividing the spring into two halves and inserting an electro-mechanical actuator. Hence, the active mechanism compensates the different torsion angles (resp. torques) by adjusting the rotor angle. The results of related test-rig experiments will be shown and the possibility to decouple the torques from each other, which can be interpreted as disturbances, is demonstrated. The strategy of active disturbance decoupling is based on the measured displacement of the hydraulic cylinder and the measured force. In chapter 2 the idea and conception of the test-rig is discussed and the realized solution is shown. The following chapter deals with the system model and especially with the idea of torque control. Furthermore the chosen disturbance profiles are shown and the effects of active decoupling are discussed. In the last chapter results of experimental tests for energy harvesting are given, showing principally the efficiency as well as the limits of todays technology.
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Wang, Wei, and Shigeki Sugano. "Output torque regulation through series elastic actuation with torsion spring hysteresis." In 2014 IEEE International Conference on Robotics and Biomimetics (ROBIO). IEEE, 2014. http://dx.doi.org/10.1109/robio.2014.7090413.

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Merino, He´ctor E. M., Jose´ Renato M. de Sousa, Carlos Magluta, and Ney Roitman. "Numerical and Experimental Study of a Flexible Pipe Under Torsion." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20902.

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The torsional behavior of a 4″ flexible pipe is here studied. The pipe was subjected to clockwise and anticlockwise torsion and also to torsion combined with tension. For pure torsion, two different boundary conditions were considered: ends free to elongate and prevented from elongating. When tensional and torsional loads are imposed to the pipe, only analyses with ends prevented from elongating are carried out. In all cases, the response of the pipe is predicted with a three-dimensional nonlinear finite element (FE) model and with a classical analytical model. Experimental tests performed at COPPE/UFRJ are also employed to validate the theoretical estimations. The obtained results point out that the pipe is torque balanced for clockwise torsion, but it is not balanced for anti-clockwise torsion. Moreover, analytical models for axissymetric analyses assume that the layers of a flexible pipe are subjected to the same twist and elongation, but the FE results state that this hypothesis holds only for anti-clockwise torsion. Therefore, some differences were found between the FE and analytical models mainly when clockwise torsion is considered. Finally, due to its ability to deal with friction and adhesion between layers, the FE estimations agreed quite well with the experimental measures.
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