Relevant bibliographies by topics / Torsion bar

Contents

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

Academic literature on the topic 'Torsion bar'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 March 2023

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Journal articles on the topic "Torsion bar"

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Zhou, Hai Jun, Hong Hong Huang, and Hua Zhang. "An Experimental Study on Mechanical Behavior of Superelastic NiTi Shape Memory Alloy Bar Subjected to Torsion." Advanced Materials Research 163-167 (December 2010): 3992–95. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.3992.

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An experimental study on mechanical behavior of superelastic NiTi shape memory alloy (SMA) bar subjected to torsion was made. The SMA specimen was in round bar shape, material phase was austenite and stress mode was torsion. The test was carried out by applying repeated cyclic uniform torsional load. Strain rate, strain amplitude and number of cycles were considered as test parameters. The test was described and analyzed in terms of three fundamental mechanical quantities: secant stiffness, energy loss per unit weight and equivalent damping. The test results show that SMA bar subjected to torsion, have great potential for application in seismic devices due to their considerable superelasticity and stable cyclic behaviors.
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Ha, Kwangtae. "Innovative Blade Trailing Edge Flap Design Concept using Flexible Torsion Bar and Worm Drive." HighTech and Innovation Journal 1, no. 3 (September 1, 2020): 101–6. http://dx.doi.org/10.28991/hij-2020-01-03-01.

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In this paper, a simple but effective trailing edge flap system was proposed. This preliminary concept uses a more practical and stable actuation system which consists of a motor-driven worm gear drive and flexible torsion bar. The flexible torsion bar is designed to be easily twisted while keeping bending rigidity as a sup-port and the worm gear drive not only provides a high torque to overcome aero-dynamic forces on the flap area and the torsional rigidity of the support bar, but also acts as a brake to avoid instability due to the high torsional flexibility of sup-port bar. A preliminary level design study was performed to show the applicability of the new trailing edge flap system for wind turbine rotor blade or helicopter blade.
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Fang, Shu-juan, and Qing-tao Lv. "EPS Sensor Torsion Bar Design and Structure Analysis." MATEC Web of Conferences 232 (2018): 04051. http://dx.doi.org/10.1051/matecconf/201823204051.

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Torsion bar design is very important on Electrical power steering(EPS) development. The mathematical model and structure for torsion bar are developed, and the torsion bar outer spline is cancelled based on the automotive parameters. This kind of structure leads to cost down and time saving on torsion bar manufacturing process. The 3D model and finite element on sub-EPS(torsion bar, input shaft, output shaft) are developed, and then do the contact nonlinear analysis based on interference between torsion bar and output shaft. The EPS structure and test reliability according to function test and durability test are verified and the test results are passed.
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Wang, Gang, Fang Wang, and Hong Chen. "Analysis on Static Stiffness of Synchronization Torsion Bar Based on Finite Element Method." Advanced Materials Research 466-467 (February 2012): 744–48. http://dx.doi.org/10.4028/www.scientific.net/amr.466-467.744.

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Synchronization torsion bar is a key part in independent and dependent impression mechanism which ensures synchronization motion at both ends of blanket cylinder. Due to frequent action of the mechanism in high-speed printing, synchronization torsion bar would cause huge impact torque so as to affect parallel shifting of blanket cylinder and uniformity of printing impression. Based on structure features and force of synchronization torsion bar, finite element model of synchronization torsion bar was established by adopting structural mechanics and finite element method, then static stiffness of synchronization torsion bar was solved by adopting principle of minimum potential energy. The result of computation shows that the maximum torsion deformation of torsion bar in X direction happens at the left connection point. Because the deformation is very small, the bar can meet the requirements that blanket cylinder.
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He, Zhuo Yu. "Simulation Analysis of Influences of Anti-Roll Torsion Bar on Vehicle Dynamics." Applied Mechanics and Materials 409-410 (September 2013): 1486–91. http://dx.doi.org/10.4028/www.scientific.net/amm.409-410.1486.

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In the secondary suspension of urban rail vehicles and high-speed passenger trains, combination of air springs and anti-roll torsion bar is widely used. However, in its practical use, cracks appear in the anti-roll torsion bar and vehicle curve performance is lower. Through analysis of anti-roll torsion bar, acceleration being taken into account, the dynamics models of anti-roll torsion bar and the vehicle itself are established. The results indicate that the combination of anti-roll torsion bar and rubber joints is superior to present a more reasonable anti-roll stiffness, to ensure better dynamic performance of the train, and also to lengthen the life of the anti-roll torsion bar.
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Huang, Zhi Qi. "Ant Colony Algorithm: an Application of Design Self-Balancing Torsion Bar." Advanced Materials Research 314-316 (August 2011): 1278–81. http://dx.doi.org/10.4028/www.scientific.net/amr.314-316.1278.

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Using the improved Ant Colony Algorithm to optimize torsion bar diameter, and take the optimization results into practice. Results not only show the Ant Colony Algorithm is feasible and provides a new method choosing torsion bar diameter but also is satisfied.Based on maximum deformation energy and not exceeding the allowable stress values of a torsion-bar spring, the thesis builds the optimization model for the self-balancing torsion bar.
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Rao, Pin Yang. "Ant Colony Algorithm: A New Method Choosing Torsion Bar Diameter." Advanced Materials Research 339 (September 2011): 295–98. http://dx.doi.org/10.4028/www.scientific.net/amr.339.295.

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The torsion bar is one of the major parts of converter tilting mechanism and is widely used for light weight, large energy stored in unit mass, simple structure, convenient arrangement without maintenance demand, etc. Results not only show the Ant Colony Algorithm is feasible and provides a new method choosing torsion bar diameter but also is satisfied.Based on maximum deformation energy and not exceeding the allowable stress values of a torsion-bar spring, the thesis builds the optimization model for the self-balancing torsion bar.
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Furch, Jan, Quy Hung Nguyen, and Jiri Stodola. "Accelerated testing of track vehicle torsion bar." MATEC Web of Conferences 327 (2020): 03001. http://dx.doi.org/10.1051/matecconf/202032703001.

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The suspension system of track vehicles is often equipped with torsion bars. The torsion bar is a key element of the vehicle's suspension system. The service life of torsion bars depends primarily on the quality of the material used, the diameter of the torsion bars and the method of attachment and placement. In order to obtain the characteristics of the torsion bar, an experimental test stand was created on which accelerated tests were performed. Furthermore, a virtual model of torsion bar operation was created. The torsion bar was modelled using finite elements (FE part). Dynamic simulation was performed using MSC Adams software. Finally, the values measured in the accelerated tests and the results of simulations were compared. Comparing the values found, it was proved that this difference is not significant. This virtual model can be used to investigate the service life of torsion bars and to predict their service life.
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Ecsedi, István, and Attila Baksa. "Saint-Venant torsion of orthotropic piezoelectric elliptical bar." Acta Mechanica 233, no. 1 (December 20, 2021): 201–11. http://dx.doi.org/10.1007/s00707-021-03110-5.

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AbstractThe object of this paper is the Saint-Venant torsion of a solid elliptical cylinder made of orthotropic homogeneous piezoelectric material. We find the shape of the homogeneous orthotropic piezoelectric elliptical cross section which does not warp under the applied torque. The sizes of the orthotropic piezoelectric solid elliptical cross section, which has the maximum value of torsional rigidity for a given cross-sectional area, are also determined.
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Liu, Chun Jie, and Bing Shou Zhu. "Development of a Measuring System for Stiffness Evaluation of Micro Torsion Bar." Applied Mechanics and Materials 33 (October 2010): 190–94. http://dx.doi.org/10.4028/www.scientific.net/amm.33.190.

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For the micro torsion bar used in inertial navigation, the torsional stiffness should be evaluated precisely. A computer-controlled instrument for stiffness measurement based on static measuring principle was introduced for variant section micro bars, The main hardware of the system includes a precision motorized rotary stage and a torsion sensor. The stepping resolution of angular displacement is 0.00250, the measurement accuracy of moment is 0.05mN•m. The measurement software was programmed on the LabVIEW platform for virtual instrument. The measuring experiments indicate the device can be used for automatic testing of stiffness of the torsion bars with high accuracy and efficiency.
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Dissertations / Theses on the topic "Torsion bar"

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Kuric, Michal. "Konstrukce nekonvenčního odpružení kabiny traktoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-400438.

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The Master’s thesis deals with the design of unconventional tractor cab suspension. It contains overview of current conceptions, mensions description of single components, takes closer look at torsion bar calculations and strength analysis. Subsequently, there is dynamic analysis of suspension in the thesis, performed with use of Adams View software aimed at ride over bump. Last section describes strength analysis of whole construction according to OECD methodics with use of numerical simulations in ANSYS Workbench software. Part of the thesis is also complete drawing documentation.
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Mazura, František. "Zařízení pro demontáž pružiny a pro měření charakteristik pružin." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417421.

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The presented master’s thesis is focused on the design of device for spring dismount from shock absorber and measuring of its spring characteristic. Then is the thesis focused on the design of device for measuring the spring characteristic of anti-roll and torsion bars. The introductory part of the thesis describes the basic distribution of springs and their properties and also design variants of wheel suspensions. Next part introduces devices already available on the market. The following sections aim to the design of stated devices itself, i.e. the description of their parts and functions, the definition of output parameters and stress-strain analysis. Both designs, including the analyses and technical drawings, were created in Autodesk Inventor software.
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Krasula, Jan. "Návrh stabilizátoru automobilu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229936.

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This master’s thesis is focused on a design of the formula student’s anti-roll bar. The beginning of the thesis is devoted to the introduction of the anti-roll bar function and the explanation of its effect on a vehicle including the analysis of various constructions. Second part deals with the Formula Student competition. There is the analysis of the formula Ford’s anti-roll bar as a starting point for our own design. In the section which deals with the anti-roll bar design several alternatives are designed, the stress analysis of components are made and multi body system models are developed for final solutions. These models serve for further analyses of driving characteristics of the vehicle.
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Ha, Kwangtae. "A Combined Piezoelectric Composite Actuator and Its Application to Wing/Blade Tips." Diss., Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7575.

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A novel combined piezoelectric-composite actuator configuration is proposed and analytically modeled in this work. The actuator is a low complexity, active compliant mechanism obtained by coupling a modified star cross sectional configuration composite beam with a helicoidal bimorph piezoelectric actuator coiled around it. This novel actuator is a good candidate as a hinge tension-torsion bar actuator for a helicopter rotor blade flap or blade tip and mirror rotational positioning. In the wing tip case, the tip deflection angle is different only according to the aerodynamic moment depending on the hinge position of the actuator along the chord and applied voltage because there is no centrifugal force. For an active blade tip subject to incompressible flow and 2D quasi steady airloads, its twist angle is related not only to aerodynamic moment and applied voltage but also to coupling terms, such as the trapeze effect and the tennis racquet effect. Results show the benefit of hinge position aft of the aerodynamic center, such that the blade tip response is amplified by airloads. Contrary to this effect, results also show that the centrifugal effects and inertial effect cause an amplitude reduction in the response. Summation of these effects determines the overall blade tip response. The results for a certain hinge position of Xh=1.5% chord aft of the quarter chord point proves that the tip deflection target design range[-2,+2] can be achieved for all pitch angle configurations chosen.
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Macháček, Tomáš. "Návrh stabilizátoru automobilu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230471.

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Tato diplomová práce je zaměřená na stabilizátory u podvozku aut. První část popisuje všeobecné znalosti vlivu naklonění karosérie na jizdní vlastnosti auta a možnosti konstrukčních řešení používaných v praxi. Dále jsou v této části uvedeny nevýhody použití stabilizátoru a jejich náhrady. Nasledující téma se zaměřuje na soutěž Formule Student a její všeobecná pravidla. Hlavní částí této práce je analýza stabilizátoru Formule Ford, na kterou v poslední části této práce navazuje analýza předního a zadního stabilizátoru Formule Student. Byly vytvořené kompletní MBS modely pro přední a zadní zavěšení včetně stabilizátoru. Díky těmto modelům bylo možné provést výpočty klopných tuhostí a pevnostní výpočty. Z těchto výpočtů bylo možné určit vhodné nastavení stabilizátoru. Všechny modely mohou být dále použitelné pro analýzu jízdních vlastností příslušného vozidla.
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Gonzalez, Vieyra Joel Abraham. "Estimation et Contrôle des Systèmes Dynamiques à Entrées Inconnues et Energies Renouvelables." Thesis, Ecole centrale de Lille, 2019. http://www.theses.fr/2019ECLI0012/document.

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De nos jours, les processus industriels se doivent d’être efficaces, en particulier au niveau de leur production et/ou consommation énergétique.Ce travail vise à améliorer l’efficacité des processus en analysant l’influence des perturbations sur leur comportement, de la phase de conception à la synthèse des contrôleurs/observateurs, ceci dans une approche intégrée.Le problème du Rejet de Perturbation est introduit ainsi que différents types de contrôles permettant d’atténuer et/ou rejeter ces perturbations. Le système de Barre de Torsion est présenté. Une loi de commande basée sur le concept d’état dérivé est présentée et ensuite validée avec comme application le rejet de perturbation. Il est nécessaire d’estimer les grandeurs physiques utilisées dans les différentes expressions de loi de commande. Un observateur à entrées inconnues basé sur la représentation bond graph est rappelé et ensuite étendu au cas multi-variable. C’est la première contribution théorique de ce travail de recherche.Nous comparons ensuite l’efficacité de différentes techniques de commandes pour le rejet de perturbation par simulation sur le système barre de torsion et analysons ainsi l’efficacité de la technique proposée. Une extension théorique au problème du découplage entrée-sortie nous permet de généraliser le problème du rejet de perturbation dans une même démarche intégrée d’analyse et de synthèse. Enfin, ces techniques sont exploitées et analysées sur le système réel. Nous validons ainsi expérimentalement nos résultats.Un modèle très simplifié de centrale hydroélectrique est développé afin d’appliquer les résultats de nos travaux. Un modèle bond graph simplifié est validé par simulation
Nowadays, industrial processes must be efficient, particularly at the production level and/or energy consumption.This research work aims at improving the process efficiency by analysing the influences of disturbances on their behaviour, from the conception phase to the synthesis of controller/observer, in an integrated approach.The disturbance rejection problem is first introduced as well as different control laws allowing attenuate/reject these disturbances. A control law based on the concept of derivative state variable is presented and validated while applied as disturbance rejection.In order to reject the disturbance, different physical variables must be estimated, such as state variables, derivative state variables as disturbance variables. An unknown input observer based on the bond graph representation is recalled and extended in the multivariable case. It is the first theoretical contribution of this work.We thus compare the efficiency of different so-called «modern control laws» for the disturbance rejection problems by simulation with the Torsion-Bar system example. We analyse the efficiency of our approach. One extension to the Input-Output decoupling problem allows us to extend the disturbance rejection problem to other control law type in an integrated approach. At least, these techniques are applied on the real Torsion-Bar system and compared. We validate our approach.Since this work aims at analysing and developing efficient control laws for industrial processes, a simplified model of a hydroelectric plant is developed, in order to apply our results. A simplified bond graph model is validated with simulations
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Klein, Glenn E. "Torsional buckling of I beam and flat bar stiffeners under combined lateral and axial loading." Thesis, Monterey, California. Naval Postgraduate School, 1985. http://hdl.handle.net/10945/21588.

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Rodrigues, Binoy Johann. "DYNAMIC FRICTIONAL RESPONSE OF GRANULAR MATERIALS UNDER SEISMICALLY RELEVANT CONDITIONS USING A NOVEL TORSIONAL KOLSKY BAR APPARATUS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=case1508455191610014.

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Beyer, André. "Résistance des barres en acier à section ouverte soumises à une combinaison d’effort normal, de flexion et de torsion." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0204/document.

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Des barres en acier à section ouverte sont, dans la majorité des cas, soumises à une combinaison d’effort normal et de flexion bi-axiale. Cependant, en raison de leur utilisation elles peuvent également être soumises à un moment de torsion. Même si les barres à section ouverte peuvent être soumises à des charges de torsion en pratique, l’Eurocode 3, ne définit pas comment la résistance de la barre peut être déterminée dans ces conditions. Ce pourquoi, l’objectif principal de cette thèse est de remplir cette lacune. Pour atteindre cet objectif, le comportement des barres métalliques soumises à une combinaison complexe de charges est étudié par voie théorique, expérimentale et numérique. Tout d’abord, la résistance plastique des barres est étudiée. En cas de torsion, il a été montré que les barres à section ouverte possèdent une réserve plastique importante qui ne peut pas être mise en évidence à l’aide d’une simple analyse élastique. Afin de tenir compte de l’effet bénéfique de la réserve plastique en torsion, une méthode d’analyse simplifiée est développée et validée par des analyses numériques. Ensuite, l’interaction plastique entre les efforts internes est étudiée. Des essais en laboratoire ont été réalisés afin de caractériser l’interaction entre l’effort tranchant et le moment de flexion. L’étude est ensuite étendue à l’aide de simulations numériques sur des cas d’interaction plus complexes incluant notamment des moments de torsion. Les essais accompagnés par l’étude numérique ont permis de mettre au point un modèle de résistance basé sur la méthode « Partial Internal Force Method » développée dans le passé. La dernière partie de la thèse concerne la résistance des barres à l’instabilité. Un modèle de résistance incluant l’effet de l’instabilité élasto-plastique est développé pour les barres métalliques en présence de torsion. Cette méthode est basée sur une extension des formules d’interaction proposées dans l’Eurocode. Afin de franchir certaines limitations liées à cette méthode, un deuxième modèle de résistance est développé pour les barres en I dans le format du « Overall Interaction Concept »
Structural steel members with open cross-section are, in the majority of cases, subject to a combination of axial forces and mono- or bi-axial bending. Nonetheless, owing to specific use they may be subject to torsion as well. Even if torsional loads are of practical interest for steel members of open section, the European standard for the design of steel structures, Eurocode 3, does not contain a generally accepted design method addressing the resistance of these members. Consequently, the main objective of this thesis is to close the lack in the current standard. So as to attain this objective the behaviour of members of open section subject to a complex load combination has been studied theoretically, experimentally and numerically. First, the plastic resistance of steel members has been analysed. It has been shown that members subject to torsion may possess a high plastic system reserve that cannot be predicted by simple elastic analysis. So as to account for the beneficial effect of the plastic reserve, a simplified analysis method has been developed and validated with numerical simulations. After this, the plastic interaction between all internal forces and moments has been studied. Several laboratory tests have been performed to characterise the interaction between bending moments and the shear force. The study is then extended to more complex interaction cases including torsion by means of numerical simulations. The laboratory test and the numerical simulations allowed the development of a precise resistance model based on the “Partial Internal Force Method” developed in the past. The last part of this thesis was dedicated to the member resistance including instability. A resistance model has been developed based on the Eurocode 3 interaction equations. So as to overcome some of the limitations linked to this method, a second design approach is developed based on the “Overall Interaction Concept”
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Yuan, Fuping. "PLATE IMPACT EXPERIMENTS TO INVESTIGATE DYNAMIC SLIP, DEFORMATION AND FAILURE OF MATERIALS." Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1193161550.

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Books on the topic "Torsion bar"

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Klein, Glenn E. Torsional buckling of I beam and flat bar stiffeners under combined lateral and axial loading. Springfield, Va: Available from National Technical Information Service, 1985.

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Manual on Design and Manufacture of Torsion Bar Springs. Society of Automotive Engineers, 1991.

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Manual on Design and Manufacture of Torsion Bar Springs and Stabilizer Bars: 2000 Edition. 5th ed. Society of Automotive Engineers Inc, 2000.

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Book chapters on the topic "Torsion bar"

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Öchsner, Andreas, and Markus Merkel. "Torsion Bar." In One-Dimensional Finite Elements, 51–56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31797-2_4.

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Barber, J. R. "Torsion of a Prismatic Bar." In Solid Mechanics and Its Applications, 241–57. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-3809-8_16.

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Barber, J. R. "Torsion of a Prismatic Bar." In Solid Mechanics and Its Applications, 269–87. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-15214-6_17.

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Chen, Weinong W., and Bo Song. "Kolsky Bar for Dynamic Tensile/Torsion Experiments." In Split Hopkinson (Kolsky) Bar, 261–89. Boston, MA: Springer US, 2010. http://dx.doi.org/10.1007/978-1-4419-7982-7_8.

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Kurtulmus, Ergin, and M. A. Sahir Arikan. "Cam Geometry Generation and Optimization for Torsion Bar Systems." In Nonlinear Dynamics, Volume 1, 459–71. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-15221-9_40.

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Lu, Wei-Yang, Helena Jin, Jay Foulk, and Jakob Ostien. "Solid Cylindrical Bar Torsion for Characterizing Shear Plastic Deformation and Failure." In Challenges in Mechanics of Time Dependent Materials, Fracture, Fatigue, Failure and Damage Evolution, Volume 2, 53–57. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-29986-6_9.

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Dong, Yahong, and Yuejin Shang. "Analysis of Characteristics and Structure Optimization of Anti-rolling Torsion Bar." In Advances in Mechanical Design, 139–50. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9941-2_12.

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Ming, Sun, Zhang Wannian, Zuo Qiang, Liu Yuehua, and Liu Fan. "Design for Brake Device of Rudder Pedal Based on Torsion Bar." In Lecture Notes in Electrical Engineering, 194–201. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-7652-0_18.

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Zhu, Haiyan, Yi Zhang, Pingbo Wu, and Jing Zeng. "The Performance Analysis of Anti-rolling Torsion Bar of High-Speed Train." In Advances in Mechanical Design, 1471–82. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-6553-8_96.

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Fang, Shujuan. "Design and Contact Nonlinear Analysis on Automotive Electrical Power Steering Torsion Bar." In Advances in Intelligent Systems and Computing, 866–72. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-00214-5_107.

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Conference papers on the topic "Torsion bar"

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Rodrigues, Saulo Machado, André Soares, Henrique Zambon, Odair Berti, and Rudimar Mazzochi. "Commercial Vehicle Cabin Suspension Torsion Bar Development." In 8th SAE Brasil International Suspension and Trailer Colloquium & Engineering Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2014. http://dx.doi.org/10.4271/2014-36-0029.

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Huang, Weiming. "Two-way behavior of a Nitinol torsion bar." In 1999 Symposium on Smart Structures and Materials, edited by Manfred R. Wuttig. SPIE, 1999. http://dx.doi.org/10.1117/12.352802.

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Cimba, David, Kyle Gilbert, and John Wagner. "Active Torsion Bar Body Roll Minimization System: Design and Testing." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-41953.

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Sport utility and light-duty commercial vehicles exhibit a higher propensity for rollover during aggressive driving maneuvers, emergency scenarios, and degraded environmental conditions. A variety of strategies have been proposed to reduce vehicle body roll including active suspensions, comprehensive yaw stability systems, and active torsion bars. The active torsion bar systems have recently gained popularity due to their cost effective design and adaptability to existing chassis systems. However, the development of new control algorithms, design of subsystem components, and the evaluation of parameter sensitivity via testing a full scale vehicle is not always practical due to cost and safety concerns. Thus, a modular simulation tool and bench top testing environment is required to facilitate design and performance studies. In this paper, a series of mathematical models will be introduced to describe the vehicle dynamics and the roll prevention system. Representative numerical results are discussed to investigate a vehicle’s transient response with and without an active torsion bar system, as well as the impact of torsion bar and hydraulic component design parameters. Finally, a hardware in-the-loop test environment will be presented.
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Xia, Wen-Zhong, Xiu-Gen Jiang, Min Ding, Hong-Zhi Wang, Xing-Hua Chen, Xiao-Ke Cheng, and Wei-Tong Guo. "Analytical element for torsion bar based on vlasov theory." In 2016 International Conference on Mechanics and Architectural Design. WORLD SCIENTIFIC, 2016. http://dx.doi.org/10.1142/9789813149021_0054.

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Pendleton, Tyler M., and Brian D. Jensen. "Compliant Mechanisms Formed From Shaped Wire." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34969.

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This paper presents an alternative to fabrication methods commonly used in compliant mechanisms research. This method integrates torsional springs made of formed wire into compliant mechanisms. In this way the desired force, stiffness, and motion can be achieved from a single piece of formed wire. Two techniques of integrating torsion springs are fabricated and modeled: helical coil torsion springs and torsion bars. Because the mechanisms are more complex than ordinary springs, simplified models, which aid in design, are presented which represent the wireform mechanisms as rigid body mechanisms using the pseudo-rigid-body model. The method is demonstrated through the design of a mechanically tristable mechanism. The validity of the simplified models is discussed by comparison to finite element models and, in the case of the torsion bar mechanism, to experimental measurements.
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Chattopadhyay, Somnath. "An Investigation of Elastic-Plastic Torsion in Strain Hardening Materials." In ASME 2021 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/imece2021-73748.

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Abstract The elastic-plastic problem of torsion of a solid circular bar of a strain hardening material has been studied in this work. The genesis of this study evolves from an experiment on torsion of circular bars where the torsional load (torque) was gradually increased causing the material to yield. The maximum torque caused the bar to go well into the plastic region. The torque-twist curves were generated for bars of circular cross-section made of aluminum. These curves which represent the material stress-strain curves, display strain-hardening characteristics. Upon load reversal, the materials yield in the reversed loading modes with reduced yield strength values displaying the Bauschinger Effect. The purpose of this investigation is to understand the effects of strain hardening on the torque-twist behavior of the materials under monotonic loading. The usual solutions to the elastic-plastic torsion assume elastic-perfectly plastic material behavior. These solutions are limited to cases where complete cross-section is plastic. This is because the elastic-plastic boundaries are generally difficult to find. Experimental solutions can be obtained readily for torsion of circular bars made of perfectly plastic materials using Nadai’s ingenious sand hill analogy. The torque for the case of sections going fully plastic can be directly obtained by determining the volume of the sand heap formed on a circular base (geometrically like the circular cross section of the bar). The analytical elastic-plastic torsion problem reduces to solving a Poisson’s equation with appropriate boundary conditions. The non-homogeneous part involves plastic strains for the strain hardened material, For the case of fully plastic behavior, the nonhomogeneous part is a constant and is amenable for analytical solutions. For the strain-hardened material, the nonhomogeneous part involves plastic strains. The solution therefore is not straightforward and requires the method of successive elastic solutions or successive approximations. It is to be noted that both the total and incremental theories of plasticity furnish the same solution to the torsion problem provided the material is perfectly plastic. It is reasonable to assume, therefore, that this will be approximately true for the case of strain hardened elastic-plastic material. Torsion experiments were conducted using circular bars of ductile materials such as steel and aluminum that exhibit strain hardening of various degrees. A good correlation results between the experimentally obtained torque twist characteristics with those obtained analytically. Relevant comparisons were also made with the fully plastic behavior obtained from Nadai’s sand heap analogy as the limiting case.
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Tarasov, E., C. Sueur, B. Ould Bouamama, and G. Dauphin-Tanguy. "Flat control of a torsion bar with unknown input estimation." In 2014 IEEE Conference on Control Applications (CCA). IEEE, 2014. http://dx.doi.org/10.1109/cca.2014.6981605.

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Yasuda, Nobuhisa, Shinichi Nishizawa, Maiko Ikeda, and Tadashi Sakai. "Trunk Lid Torsion Bar Design Based on Reverse Engineering Method." In WCX™ 17: SAE World Congress Experience. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2017. http://dx.doi.org/10.4271/2017-01-1303.

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Galuppi, L. "The extended membrane analogy for an engineered evaluation of the torsional properties of multi-material beams." In AIMETA 2022. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902431-15.

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Abstract. Prandtl’s membrane analogy for cylindrical bars under torsion is extended to beams with multi-material cross section of any geometry. It was demonstrated that the problem is governed by equations formally analogue to those describing the deformation of an inflated membrane, differently tensioned in the regions corresponding to the cross-section domains hosting different materials. The analogy allows to evaluate not only the state of stress in the composite bar, but also its torsional stiffness. Here, the proposed method is used to evaluate the torsional response of a wide range of geometries, corresponding to glued multi-material bars, layered composites and laminated glass with reinforcements.
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Nepomuceno, Andre, Fernando M. de Almeida Jr., and Maria A. B. do Vale. "Limits on Torsion parameters from $t\bar t$ production at LHC." In The European Physical Society Conference on High Energy Physics. Trieste, Italy: Sissa Medialab, 2018. http://dx.doi.org/10.22323/1.314.0321.

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Reports on the topic "Torsion bar"

1

House, William. Fuzzy Logic as a Tool to Compare Reliability of Torsion Bar System. Fort Belvoir, VA: Defense Technical Information Center, December 2009. http://dx.doi.org/10.21236/ada513266.

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