Log in

Relevant bibliographies by topics / Torsional stiffness

Contents

Journal articles
Dissertations / Theses
Books
Book chapters
Conference papers
Reports

Academic literature on the topic 'Torsional stiffness'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Torsional stiffness.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Torsional stiffness"

1

Tso, W. K., and C. M. Wong. "An evaluation of the New Zealand code torsional provision." Bulletin of the New Zealand Society for Earthquake Engineering 26, no. 2 (June 30, 1993): 194–207. http://dx.doi.org/10.5459/bnzsee.26.2.194-207.

Full text

Abstract:

This study evaluates the New Zealand torsional provision in the 1984 and 1992 editions of the New Zealand loading code (NZS 4203) based on the inelastic responses of a single mass model having lateral load resisting elements in two orthogonal directions and subjected to bidirectional base excitations. It is shown that for systems having torsional stiffnesses that exceed a minimum value, the provision in NZS 4203:1984 will restrict the ductility demands on the resisting elements no more than those of a similar but torsionally balanced system. This minimum torsional stiffness depends on the structural eccentricity of the system. For systems with torsional stiffness less than the minimum, the stiff edge elements can experience additional ductility demand because the 1984 edition of the Code permits excessive strength reduction on the stiff edge elements. In the 1992 edition, the Code imposes a minimum torsional stiffness of a structure in the farm of edge displacement ratios. With this new requirement, the danger of additional ductility demand on the stiff edge element is eliminated. Therefore, the torsional provision in the current edition will ensure no additional ductility demands on all lateral force elements caused by torsion.

APA, Harvard, Vancouver, ISO, and other styles

2

Wang, Chunjian, Beshah Ayalew, John Adcox, Benoit Dailliez, Tim Rhyne, and Steve Cron. "Self-Excited Torsional Oscillations under Locked-Wheel Braking: Analysis and Experiments." Tire Science and Technology 43, no. 4 (October 1, 2015): 276–96. http://dx.doi.org/10.2346/tire.15.430402.

Full text

Abstract:

ABSTRACT This paper analyzes the effect of tire/vehicle parameters, specifically of tire/suspension torsional stiffnesses, on the stability of self-excited tire torsional oscillations during locked-wheel braking events. Using a torsionally flexible tire-wheel model and a dynamic tire-ground friction model, two system models for tire oscillations are considered: with suspension torsional compliance included in one but excluded in the other. Bifurcation analysis is conducted on both systems to derive the effect of tire/vehicle parameters on the stability. For the system without suspension torsional compliance, it is highlighted that the primary cause of unstable self-excited oscillations is the “Stribeck” effect in tire-ground friction. Based on the parameters obtained experimentally, the bifurcation surface of vehicle velocity with respect to tire/suspension torsional stiffness is also given. The effect of tire/suspension torsional stiffness to the stability of tire torsional oscillation is qualitatively validated via comparisons between locked-wheel braking simulations and experiments with tires with different torsional stiffnesses.

APA, Harvard, Vancouver, ISO, and other styles

3

Pan, Wen-Hao, Chuan-Hao Zhao, Yuan Tian, and Kai-Qi Lin. "Exact Solutions for Torsion and Warping of Axial-Loaded Beam-Columns Based on Matrix Stiffness Method." Nanomaterials 12, no. 3 (February 4, 2022): 538. http://dx.doi.org/10.3390/nano12030538.

Full text

Abstract:

The typically-used element torsional stiffness GJ/L (where G is the shear modulus, J the St. Venant torsion constant, and L the element length) may severely underestimate the torsional stiffness of thin-walled nanostructural members, due to neglecting element warping deformations. In order to investigate the exact element torsional stiffness considering warping deformations, this paper presents a matrix stiffness method for the torsion and warping analysis of beam-columns. The equilibrium analysis of an axial-loaded torsion member is conducted, and the torsion-warping problem is solved based on a general solution of the established governing differential equation for the angle of twist. A dimensionless factor is defined to consider the effect of axial force and St. Venant torsion. The exact element stiffness matrix governing the relationship between the element-end torsion/warping deformations (angle and rate of twist) and the corresponding stress resultants (torque and bimoment) is derived based on a matrix formulation. Based on the matrix stiffness method, the exact element torsional stiffness considering the interaction of torsion and warping is derived for three typical element-end warping conditions. Then, the exact element second-order stiffness matrix of three-dimensional beam-columns is further assembled. Some classical torsion-warping problems are analyzed to demonstrate the established matrix stiffness method.

APA, Harvard, Vancouver, ISO, and other styles

4

Li, Hong Yan, and Xiu Li Li. "Finite Element Analysis of the Cylindrical Helical Torsional Spring." Applied Mechanics and Materials 397-400 (September 2013): 633–36. http://dx.doi.org/10.4028/www.scientific.net/amm.397-400.633.

Full text

Abstract:

Stress of the cylindrical helical torsion spring is researched with finite element method when torsional degree changes. For spring has great resilience, large deformation effect is considered in the simulations. Analysis on the stiffness shows that the model built is credible, although torsional stiffness is not constant for large torsional angle, the strength is enough whose variation trend is consistent with the spring stiffness with different working torsional angle.

APA, Harvard, Vancouver, ISO, and other styles

5

Kasti, Najib A. "Zigzag Carbon Nanotubes under Simple Torsion – Structural Mechanics Formulation." Advanced Materials Research 452-453 (January 2012): 1139–43. http://dx.doi.org/10.4028/www.scientific.net/amr.452-453.1139.

Full text

Abstract:

When using structural mechanics to study the deformation of carbon nanotubes (CNTs), one has to pick the structural mechanics properties that are equivalent to the molecular mechanics properties. In a previous publication [1], we have determined the relation between the bending stiffness EI/a used in structural mechanics and the bond bending stiffness C used in molecular mechanics for zigzag carbon nanotubes under simple tension. This paper extends the concept and determines the corresponding relation for simple torsion. We show that the relation obtained is different than that of simple tension; in simple torsion, EI/a is load and chirality dependent. However, for the particular case of a graphene sheet, simple tension and torsion lead to the same value of EI/a, namely C/2. We also include the structural mechanics deformation of the tube that accounts for axial, bending and torsional structural stiffnesses. Unlike simple tension, the deformation in the case of simple torsion has the axial stiffness coupled to the bending and torsional stiffnesses.

APA, Harvard, Vancouver, ISO, and other styles

6

Mohamed, Osama Ahmed, and Mohamed Sherif Mehana. "Assessment of Accidental Torsion in Building Structures Using Static and Dynamic Analysis Procedures." Applied Sciences 10, no. 16 (August 9, 2020): 5509. http://dx.doi.org/10.3390/app10165509.

Full text

Abstract:

This article presents the findings of a study on assessment of the increase in building’s response due to accidental torsion when subjected to seismic forces. Critical stiffness and geometrical parameters that define buildings torsional response are examined including: (1) the ratio, Ω, between uncoupled torsional frequency ωθ to uncoupled translation frequencies in the direction of ground motion ωx or ωy, (2) floor plan aspect ratio, b/r, which is a function of the floor dimension and radius of gyration. The increased response is assessed on symmetric multi-storey buildings using both static and dynamic analysis methods specified by ASCE-7 and considering parameters affecting the torsional response. It was concluded that static and dynamic analysis procedures predict different accidental torsion responses. Static analysis based on the Equivalent Lateral Force (ELF) method predicts more conservative accidental torsions responses for flexible structures with Ω < 0.7~0.80, while the responses are less conservative for stiffer buildings. The conservativism in static analysis method is attributed to the response amplification factor, Ax. Floor plans and their lateral support system having frequency ratio Ω = 1 will also have a torsional radius equal to radius of gyration, and will experience drop in torsional response relative to more torsionally flexible buildings. This article presents a procedure to overcome the shortcomings of static and dynamic analysis procedures in terms of estimating accidental torsion response of symmetric building structures.

APA, Harvard, Vancouver, ISO, and other styles

7

Kurdi, Ojo, Mohd Shukri Yob, Awisqarni Haji Ishamuddin, Agus Suprihanto, Susilo Adi Widyanto, Dwi Basuki Wibowo, and Ian Yulianti. "Design and fabrication of a twist fixture to measure torsional stiffness of a pick up chassis." MATEC Web of Conferences 159 (2018): 02030. http://dx.doi.org/10.1051/matecconf/201815902030.

Full text

Abstract:

Torsional stiffness is important parameter of chassis that affect the handling performance of chassis. Torsional stiffness can be determined using Finite Element Method (FEM) in early stage design of its. In order to validate the FEM result, experimental work needs to be done. The fixture has been design in simpler stucture, flexible for any kind of chassis and using a simple measurement’s equipment such as dial indicator and load cell. Twist fixture has been designed for measuring of torsional stiffness of TATA cab chassis indirectly. The fixture measured the deflection caused by torsion subjected to the chassis. The torsional stiffness was calculated based on measured displacement of chassis. The result of comparison shows that the experimental results in agreement with the simulation results. Therefore, the simulation results of TATA cab chassis model are valid.

APA, Harvard, Vancouver, ISO, and other styles

8

Humar, JagMohan, Soheil Yavari, and Murat Saatcioglu. "Design for forces induced by seismic torsion." Canadian Journal of Civil Engineering 30, no. 2 (April 1, 2003): 328–37. http://dx.doi.org/10.1139/l02-029.

Full text

Abstract:

Eccentricities between the centres of rigidity and centres of mass in a building cause torsional motion during an earthquake. Seismic torsion leads to increased displacement at the extremes of the building and may cause distress in the lateral load-resisting elements located at the edges, particularly in buildings that are torsionally flexible. For an equivalent static load method of design against torsion, the 1995 National Building Code of Canada specifies values of the eccentricity of points through which the inertia forces of an earthquake should be applied. In general, the code requirements are quite conservative. They do not place any restriction on the torsional flexibility, however. New proposals for 2005 edition of the code which simplify the design eccentricity expressions and remove some of the unnecessary conservatism are described. The new proposals will require that a dynamic analysis method of design be used when the torsional flexibility of the building is large. Results of analytical studies, which show that the new proposals would lead to satisfactory design, are presented.Key words: torsional response to earthquake, natural torsion, accidental torsion, design for torsion, National Building Code of Canada, interdependence of strength and stiffness.

APA, Harvard, Vancouver, ISO, and other styles

9

Jin, Guanghu, Wei Ren, and Rupeng Zhu. "Influence of torsional stiffness on load sharing coefficient of a power split drive system." MATEC Web of Conferences 211 (2018): 17002. http://dx.doi.org/10.1051/matecconf/201821117002.

Full text

Abstract:

A dynamic model of power split transmission system with face gear and cylindrical gear is established. The factors including time-varying mesh stiffness, torsional stiffness, supporting stiffness, and clearance are considered in the model. The influence of the torsional stiffness of compound gear shaft on the load sharing coefficient is analyzed. The results show that the influence of the torsional stiffness of the compound gear shaft is obvious. Because the torsional stiffness of the output gear components is larger and the torsional stiffness of the input gear is smaller, so the input stage's deformation coordination ability is strong. Therefore, with the increase of the torsional stiffness of the compound gear shaft, the load sharing coefficient of the power input stages is improved, but the load sharing coefficient of the split torque stages and power confluence stages is worse. Hence, the torsional stiffness ratio of the transmission shaft should be rationally allocated under the condition that the torsional stiffness of the compound shaft is small.

APA, Harvard, Vancouver, ISO, and other styles

10

Kurdi, Ojo, Roslan Abdul Rahman, and Pakharuddin Mohd Samin. "Optimization of Heavy Duty Truck Chassis Design by Considering Torsional Stiffness and Mass of the Structure." Applied Mechanics and Materials 554 (June 2014): 459–63. http://dx.doi.org/10.4028/www.scientific.net/amm.554.459.

Full text

Abstract:

The torsional stiffness is one of the most important properties of chassis that significantly affect its dynamic characteristics such as handling and rollover. The torsional stiffness is desired to be as high as possible since low torsional stiffness may cause resonance or vibration. There are several types of heavy duty truck chassis that used in Malaysia and no information about the torsional stiffness magnitude of it. In this work, the torsional stiffness of several existing types of heavy duty truck chassis and some modified types, namely: arc model, block model, hole model, multi holes model and fully block model are determined using finite element method. The torsional stiffness of several chassis was compared together with the weight comparison in order to get the best design of chassis that has high torsional stiffness and low weight. Based on the simulation result, the multi holes model is the best design due to the highest of torsional stiffness and the lowest mass.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Dissertations / Theses on the topic "Torsional stiffness"

1

Guo, Zhiling. "Torsional Stiffness of Corrugated Paperboard." Miami University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1477434308012406.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Steed, William T. "Torsional Stiffness Measuring Machine (TSMM) and Automated Frame Design Tools." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1273168255.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Assaye, Abb. "Torsional Stiffness Calculation of CFRP Hybrid Chassis using Finite Element Method : Development of calculation methodology of Formula Student CFRP Chassis." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-79065.

Full text

Abstract:

Composite sandwich structures are being used in the automotive and aerospace industries at an increasing rate due to their high strength and stiffness per unit weight. Many teams in the world’s largest engineering competition for students, Formula Student, have embraced these types of structures and are using them in their chassis with the intent of increasing the torsional stiffness per unit weight. The Formula Student team at Karlstad University, Clear River Racing, has since 2017 successfully built three carbon fiber based sandwich structure chassis. A big challenge when designing this type of chassis is the lack of strategy regarding torsional stiffness simulations. Thus, the goal of this thesis project was to provide the organization with a set of accurate yet relatively simple methods of modelling and simulating the torsional stiffness of the chassis. The first step in achieving the goal of the thesis was the implementation of simplifications to the material model. These simplifications were mainly targeted towards the aluminum honeycomb core. In order to cut computational times and reduce complexity, a continuum model with orthotropic material properties was used instead of the intricate cellular structure of the core. To validate the accuracy of this simplification, the in-plane elastic modulus of the core was simulated in the finite element software Abaqus. The stiffness obtained through simulations was 0.44 % larger than the theoretical value. The conclusion was therefore made that the orthotropic continuum model was an accurate and effective representation of the core. Furthermore, simplifications regarding the adhesive film in the core-carbon fiber interfaces were made by using constraints in Abaqus instead of modelling the adhesive films as individual parts. To validate this simplification and the overall material model for the sandwich structure, a three-point bend test was simulated in Abaqus and conducted physically. The stiffness for the sandwich panel obtained through physical testing was 2.4 % larger than the simulated stiffness. The conclusion was made that the simplifications in the material modelling did not affect the accuracy in a significant way. Finally, the torsional stiffness of the 2020 CFRP chassis was found to be 12409.75 Nm/degree. In addition to evaluating previously mentioned simplifications, this thesis also serves as a comprehensive guide on how the modelling of the chassis and how the three-point bend test can take place in regards to boundary conditions, coordinate system assignments and layup definitions.

APA, Harvard, Vancouver, ISO, and other styles

4

Judd, Clinton T. "LATERAL-TORSIONAL VIBRATION OF A SIDE-LOADED ROTOR WITH ASYMMETRIC SHAFT STIFFNESS." DigitalCommons@CalPoly, 2010. https://digitalcommons.calpoly.edu/theses/288.

Full text

Abstract:

Using energy equations a four degrees of freedom analytical model is developed for a two-disk rotor with shaft stiffness asymmetry. A radial constant force is applied to the outboard disk to emphasize the effects of gravity or aerodynamic side loading. Special emphasis is placed on characterizing the lateral and torsional vibration trends associated with shaft asymmetry which may be used to identify failing shafts in operational rotor systems. Simulation reveals distinct patterns in lateral and torsional response, with strong dependencies on the magnitude of the side load, magnitude of the asymmetry and proximity of the lateral and torsional natural frequencies. Notable interaction is also observed between the lateral and torsional response. Lateral response peaks are found to correlate to torsional response peaks under some conditions. An experiment is performed to compare the response of a real system with the simulated model.

APA, Harvard, Vancouver, ISO, and other styles

5

Villasenor, Aguilar Jose Maria. "Lateral-Torsional Buckling Instability Caused by Individuals Walking on Wood Composite I-Joists." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/19212.

Full text

Abstract:

Recent research has shown that a significant number of the falls from elevation occur when laborers are working on unfinished structures. Workers walking on wood I-joists on roofs and floors are prone to fall hazards. Wood I-joists have been replacing dimension lumber for many floor systems and a substantial number of roof systems in light-frame construction. Wood I-joists are designed to resist axial stresses on the flanges and shear stresses on the web while minimizing material used. However, wood I-joists have poor resistance to applied lateral and torsional loads and are susceptible to lateral-torsional buckling instability. Workers walking on unbraced or partially braced wood I-joists can induce axial and lateral forces as well as twist. Experimental testing demonstrated that workers cause lateral-torsional buckling instability in wood I-joists. However, no research was found related to the lateral-torsional buckling instability induced by individuals walking on the wood I-joists. Furthermore, no research was found considering the effects of the supported end conditions and partial bracing in the lateral-torsional buckling instability of wood I-joists.
The goal of this research was to derive mathematical models to predict the dynamic lateral-torsional buckling instability of wood composite I-joists loaded by individuals walking considering different supported end conditions and bracing system configurations. The dynamic lateral-torsional buckling instability was analyzed by linearly combining the static lateral-torsional buckling instability with the lateral bending motion of the wood I-joists. Mathematical models were derived to calculate the static critical loads for the simply supported end condition and four wood I-joist hanger supported end conditions. Additionally, mathematical models were derived to calculate the dynamic maximum lateral displacements and positions of the individual walking on the wood I-joists for the same five different supported end conditions. Three different lean-on bracing systems were investigated, non-bracing, one-bracing, and two-bracing systems. Mathematical models were derived to calculate the amount of constraint due to the lean-on bracing system. The derived mathematical models were validated by comparison to data from testing for all supported end conditions and bracing systems.
The predicted critical loads using the static buckling theoretical models for the non-bracing system and the static buckling theoretical models combined with the bracing theoretical models for the simply and hanger supported end conditions agreed well with the critical loads obtained from testing for the two wood I-joist sizes investigated. The predicted maximum lateral displacements and individual positions using the bending motion theoretical models for the simply and hanger supported end conditions agreed well with the corresponding maximum lateral displacements and individual positions obtained from testing for both wood I-joist sizes. Results showed that; a) the supported end condition influenced the critical loads, maximum lateral displacements and individual positions, b) the bracing system increased the critical loads and reduced the maximum lateral displacements, c) the critical load increased as the load position displaced away from the wood I-joist mid-span, d) the critical load reduced as the initial lateral displacement of the wood I-joist increased and e) the wood I-joist mid-span was the critical point in the dynamic lateral-torsional buckling instability.

Ph. D.

APA, Harvard, Vancouver, ISO, and other styles

6

Adriaenssens, Sigrid Maria Louis. "Stressed spline structures." Thesis, University of Bath, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341171.

Full text

Abstract:

This thesis concerns stressed spline structures. A spline is defined as `an initially straight member with identical second moment of area about any axis perpendicular to its centroidal axis, bent into a spatial curve'. An analytical proof is presented to show that the spline's torsional stiffness is of no importance in its analysis (provided construction details do not introduce any torsional moment). This paramount proof allows the formulation of a spline analysis that relies solely on three translational degrees of freedom (3DOF) per node. Applying this 3DOF analysis to unstrained curves and battened or hoop supported membranes is approximate since the bending stiffness would correspond to one direction only. A series of four test cases validates the proposed 3DOF analysis. The analysis is first applied to a laterally loaded spline ring, where solution convergence and the effect of unequal length segment modelling are investigated. Most significantly, this test case demonstrates that the spline ring has a greater out-of-plane stiffness than a pre-bent ring. This feature lies at the basis of spline stressed membranes - the spline has superior out-of-plane stiffness under the action of forces applied by the membrane. The second and third test cases -- buckling of elastica and of a shallow sinusoidal arch -- clearly demonstrate that the 3DOF analysis is much faster, more accurate, and produces results closer to the analytical values compared with a 6DOF analysis. The fourth test case proves the efficiency of the 3DOF analysis through investigating buckling behaviour and loads of four circular arches under radial loading. As the torsional stiffness does not enter the 3DOF analysis, the stiffness of a spline constructed of spliced segments is identical to that of a continuous spline. In order to demonstrate their feasibility, five medium span (161n-32m) Glass Fibre Reinforced Plastic (GFRP) and one large span (57nt) steel tensegrity stressed spline membranes are designed, form-found and analysed under realistic loading conditions. These design studies show firstly that the spline and membrane stresses occurring under loading are within acceptable material limits and secondly that buckling occurs at values much higher than those encountered in reality. This thesis has demonstrated that engineered stressed spline structures, for which the development of a 3DOF was essential, have great design potential.

APA, Harvard, Vancouver, ISO, and other styles

7

Herrmann, Manuel. "Torsional Stiffness and Natural Frequency Analysis of a Formula SAE Vehicle Carbon Fiber Reinforced Polymer Chassis using Finite Element Analysis." DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1692.

Full text

Abstract:

Finite element is used to predict the torsional stiffness and natural frequency response of a FSAE vehicle hybrid chassis, utilizing a carbon fiber reinforced polymer sandwich structure monocoque and a tubular steel spaceframe. To accurately model the stiffness response of the sandwich structure, a series of material tests for different fiber types has been performed and the material properties have been validated by modeling a simple three-point-bend test panel and comparing the results with a physical test. The torsional stiffness model of the chassis was validated with a physical test, too. The stiffness prediction matches the test results within 6%. The model was then used to model the natural frequency response by adding and adjusting the materials’ densities in order to match physical mass properties. A hypothesis is made to explain the failure of the engine mounts under the dynamic response of the frame.

APA, Harvard, Vancouver, ISO, and other styles

8

Hu, Ye. "Lateral Torsional Buckling of Wooden Beams with Mid-Span Lateral Bracing." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/35076.

Full text

Abstract:

An analytical and numerical investigation is conducted for the lateral torsional buckling analysis of wooden beam with a mid-span lateral brace subjected to symmetrically distributed loading. Two models are developed; one for the case of a rigid brace and another one for the case of a flexible brace. The analytical solutions are based on the principle of stationary potential energy and a Fourier expansion of the buckling displacement fields and bending moments. The validity of both models are verified against 3D finite element analyses in ABAQUS. Where applicable, verifications were also conducted against available solutions from previous studies. Parametric studies were conducted to investigate the effect of geometric and material parameters on the critical moments. The results indicate the presence of two separate groups of potential buckling modes, symmetric and anti-symmetric, with fundamentally different behavioural characteristics. The governing buckling mode is shown to depend on the bracing height, load height and lateral brace stiffness. The study shows that beyond a certain threshold bracing height, the critical moment is governed by the antisymmetric mode of buckling. Also, above a certain optimum bracing stiffness, no increase is observed in the critical moments. The models developed are used to construct a comprehensive database of parametric investigations which are then employed for developing simplified equations for determining the threshold heights, associated critical moments, and optimum stiffness.

APA, Harvard, Vancouver, ISO, and other styles

9

Fraser, Samuel. "A method of using computer simulation to assess the functional performance of football boots." Thesis, Loughborough University, 2015. https://dspace.lboro.ac.uk/2134/17733.

Full text

Abstract:

This thesis details the development of Finite Element Analysis (FEA) techniques to simulate assembly and functional performance of football boots within a virtual environment. With a highly competitive market and seasonal changes in boot design common, the current design process can require numerous iterations, each adding time and cost to the development cycle. Using a reliable model allows evaluation of novel design concepts without the necessity to manufacture physical prototypes, and thus has potential financial benefits as well as reducing development time. A modelling approach was developed to construct a three dimensional boot model using FEA techniques, simulating the assembly of representative boot constituent parts based on manufacturing patterns, geometries and materials. Comparison between the modelled and physical boots demonstrated good agreement. Assessment of physical boot manufacture enabled the validation of the simulated assembly techniques, with digital image correlation hardware and software used to provide experimental measurements of the surface deformation. Good agreement was reported, demonstrating the predictive capabilities of FEA. Extensive review of literature provided applicable loading conditions of the boot during game play, with bending and torsional stiffness identified as important parameters. Boundary conditions associated with the foot during these movements provided a platform from which mechanical tests were used and developed to quantify boot function. Modelling techniques were developed and applied to the assembled FEA boot model, simulating the loading conditions to verify the validity when compared with experimental measurements. Bending and torsional stiffness extracted from the model were compared with the physical equivalent, demonstrating good predictive capabilities. The model was able to represent bending stiffness of the physical equivalent within 5.6% of an accepted boot range up to 20°, with torsional stiffness represented within the accepted range between 10° inversion to 7.5° eversion, corresponding to a large proportion of match play. Two case studies proved the applicability of the FEA techniques to simulate assembly and determine mechanical functionality virtually through a combination of automated modelling methods and a bespoke framework, demonstrating how it could be implemented within the industrial design process.

APA, Harvard, Vancouver, ISO, and other styles

10

Kumar, Naren. "Investigation of drive-train dynamics of mechanical transmissions incorporating cycloidal drives." Thesis, Queensland University of Technology, 2015. https://eprints.qut.edu.au/84752/8/Naren%20Kumar%20Thesis.pdf.

Full text

Abstract:

Cycloidal drives are compact, high-ratio gear transmission systems used in a wide range of mechanical applications from conveyor drives to articulated robots. This research hypothesises that these drives can be successfully applied in dynamic loading situations and thereby focuses on the understanding of differences between static and dynamic loading conditions where load varies with time. New methods of studying the behaviour of these drives under static and dynamic loading circumstances were developed, leading to novel understanding and knowledge. A new model was developed to facilitate research and development on Cycloidal drives with potential benefits for manufacturing, robotics and mechanical-process-industries worldwide.

APA, Harvard, Vancouver, ISO, and other styles

More sources

Books on the topic "Torsional stiffness"

1

Daubach, Kevin. 22FTM17, a Decomposition of the Torsional Stiffness of a Worm Gearbox into Individual Components. American Gear Manufacturers Association, 2022.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

2

Malen, Donald E. Fundamentals of Automobile Body Structure Design. 2nd ed. SAE International, 2020. http://dx.doi.org/10.4271/9781468601756.

Full text

Abstract:

This book provides readers with a solid understanding of the principles of automobile body structural design, illustrating the effect of changing design parameters on the behavior of automobile body structural elements. Emphasizing simple models of the behavior of body structural systems rather than complex mathematical models, the book looks at the best way to shape a structural element to achieve a desired function, why structures behave in certain ways, and how to improve performance. This second edition of Fundamentals of Automobile Body Structure Design contains many new sections including: the treatment of crashworthiness conditions of static roof crush and the small overlap rigid barrier torsion stiffness requirements material selection illustrations of body architecture Each chapter now includes a clear flow down of requirements following the systems engineering methodology. Illustrations have been updated and expanded and a fresh modern format has been adapted enhancing the readability of the book.

APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Torsional stiffness"

1

Tang, Xiaolin, Yanjun Huang, Hong Wang, and Yechen Qin. "Transmission System Parameters and Meshing Stiffness Calculation." In Noise and Torsional Vibration Analysis of Hybrid Vehicles, 51–61. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-031-01498-7_4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Xue, Song, Rodney Entwistle, Ilyas Mazhar, and Ian Howard. "The Torsional Stiffness of Involute Spur Planetary Gears." In Proceedings of the 9th IFToMM International Conference on Rotor Dynamics, 1369–79. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-06590-8_112.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Jiang, Zhengfeng, Shaobo Xu, and Lei Chen. "Testing Technology of Torsional Vibration Spring Static Stiffness." In Intelligent Robotics and Applications, 784–93. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-88518-4_84.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Zhao, Qian. "Study on Driveline Component Torsional Stiffness Effect on RWD Driveline Torsional Vibration Modes." In Lecture Notes in Electrical Engineering, 87–102. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33832-8_7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Pasha, Hasan G., Randall J. Allemang, David L. Brown, and Allyn W. Phillips. "Static Torsional Stiffness from Dynamic Measurements Using Impedance Modeling Technique." In Dynamics of Coupled Structures, Volume 1, 307–16. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04501-6_29.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Chen, Yutang, and Jun Yang. "Variation of Elastic Stiffness of Saturated Sand Under Cyclic Torsional Shear." In Proceedings of the 4th International Conference on Performance Based Design in Earthquake Geotechnical Engineering (Beijing 2022), 2171–79. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-11898-2_200.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Gao, Tiantian, Hui Liu, Xiaojie Wang, and Wenping Li. "Study on Dynamic Stability of a Torsional Isolator with Negative Stiffness Structures." In Advances in Mechanical Design, 749–63. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-6553-8_50.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Pasha, Hasan G., Randall J. Allemang, Allyn W. Phillips, Alexander Young, and Jeff Poland. "Estimation of Torsional Compliance (Stiffness) from Free-Free FRF Measurements: eRCF Theory." In Experimental Techniques, Rotating Machinery, and Acoustics, Volume 8, 121–32. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15236-3_12.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Poland, Jeffrey, Alexander Young, Hasan Pasha, Randall Allemang, and Allyn Phillips. "An Estimation of Torsional Compliance (Stiffness) from Free-Free FRF Measurements: eRCF Application." In Experimental Techniques, Rotating Machinery, and Acoustics, Volume 8, 133–39. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15236-3_13.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Raines, M., G. E. Roe, and T. E. Thorpe. "The Relationship between Twist Axis and Effective Torsional Stiffness of a Motorcycle Frame." In Computational Mechanics ’86, 571–77. Tokyo: Springer Japan, 1986. http://dx.doi.org/10.1007/978-4-431-68042-0_77.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Torsional stiffness"

1

Guangming, Zhao, and Jiang Zhengfeng. "Study on Torsional Stiffness of Engine Crankshaft." In 2009 International Forum on Computer Science-Technology and Applications. IEEE, 2009. http://dx.doi.org/10.1109/ifcsta.2009.345.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Chang, Chau-Chin. "Measurement of Torsional Natural Frequencies, Moments of Inertia and Torsional Stiffness of Shafts." In SAE 2005 Noise and Vibration Conference and Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2005. http://dx.doi.org/10.4271/2005-01-2273.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Costa, João Augusto da, and Daniel Vilela. "Formula SAE Frame Torsional Stiffness Study using FEA." In 23rd SAE Brasil International Congress and Display. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2014. http://dx.doi.org/10.4271/2014-36-0234.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Wu zhifei, Wang tie, and Zhang ruiliang. "A study of spur gear torsional mesh stiffness." In International Technology and Innovation Conference 2009 (ITIC 2009). IET, 2009. http://dx.doi.org/10.1049/cp.2009.1476.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Annicchiarico, A., F. Caputo, G. De Angelis, F. Frascà, G. Lamanna, A. D’Amore, Domenico Acierno, and Luigi Grassia. "Torsional Stiffness Verification of an Adhesively Bonded Joint." In V INTERNATIONAL CONFERENCE ON TIMES OF POLYMERS (TOP) AND COMPOSITES. AIP, 2010. http://dx.doi.org/10.1063/1.3455649.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Wang, Hong-wei, Chen-jie Qi, Qimusurong, Bing-jiang Zhang, and Zhen-hua Xing. "The research of zero torsional stiffness rotating gyroscope." In 2010 2nd International Conference on Industrial Mechatronics and Automation (ICIMA 2010). IEEE, 2010. http://dx.doi.org/10.1109/icindma.2010.5538146.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Zhi, Pengbo, Li Zhou, and Tao Qiu. "Compensation method for torsional stiffness of flexible wing." In Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, edited by Daniele Zonta and Haiying Huang. SPIE, 2020. http://dx.doi.org/10.1117/12.2557758.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Kulhanek, Chris D., Stephen M. James, and Justin R. Hollingsworth. "Stiffening Effect of Motor Core Webs for Torsional Rotordynamics." In ASME Turbo Expo 2012: Turbine Technical Conference and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/gt2012-69967.

Full text

Abstract:

Longitudinal webs or spider bars are often placed mid-span of a motor shaft and are primarily used to support the windings or rotor laminations while allowing sufficient space for cooling air flow. When subject to a torque, the radial webs experience a loading configuration that includes bending and torsion while the base shaft experiences pure torsion. A webbed cross-section has a higher torsional stiffness as compared to the torsional stiffness of just the circular portion of the shaft section. This influences the torsional critical speeds and can become important for torsional systems that operate with minimal separation margins from resonance frequencies. This work presents various approaches to calculate the stiffening effect. The approaches include empirical and analytical methods described by Nestorides and API 684. An additional method uses a solid model of the motor core and a commercial Finite Element Analysis (FEA) solver to predict steady-state deflection under a torsional load. This in turn allows for a torsional stiffness calculation. Motor core configurations with various shaft diameters, number of spider bars, and spider bar geometries are considered. Good agreement is shown between the FEA results and the Griffith and Taylor method described by Nestorides. The other methods considered, including the calculation method described in API 684, show generally poor agreement with the FEA torsional stiffness results for the webbed shaft geometries studied.

APA, Harvard, Vancouver, ISO, and other styles

9

Wang, Chunjian, John Adcox, Beshah Ayalew, Benoit Dailliez, Timothy Rhyne, and Steve Cron. "On the Stability of Tire Torsional Oscillations Under Locked-Wheel Braking." In ASME 2014 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/dscc2014-5988.

Full text

Abstract:

This paper deals with the stability of self-excited tire torsional oscillations during locked-wheel braking events. Using a combination of torsionally flexible tire-wheel model and a dynamic tire-ground friction model, it is highlighted that the primary cause of unstable oscillations is the ‘Stribeck’ effect in tire-ground friction. It is also shown analytically that when suspension torsional compliances are negligible, the bifurcation parameters for the local torsional instability include forward speed, normal load and tire radius. In the presence of significant suspension torsional compliance, it is shown that the stability is also affected by suspension torsional stiffness and damping. Furthermore, the tire torsional stiffness becomes an important bifurcation parameter only in the presence of significant suspension compliance. This analysis gives useful insights for the selection of tire sidewall stiffness ranges and their proper matching with targeted vehicle suspensions at the design stage.

APA, Harvard, Vancouver, ISO, and other styles

10

Shu-yi, Pang, Guan Xin, and Zhan Jun. "Research of Chassis Torsional Stiffness on Vehicle Handling Performence." In 2010 WASE International Conference on Information Engineering (ICIE 2010). IEEE, 2010. http://dx.doi.org/10.1109/icie.2010.237.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Torsional stiffness"

1

Truong, Jonas, Phillippe Gosselin, and Alexis Lussier-Desbiens. The Effect of Bending and Torsional Stiffness on the Edge Grip of an Alpine Ski. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317481.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!