The Chosen Aspects of Materials and Construction Influence on the Tire Safety

Koštial, Pavel; Krmela, Ján; Frydrýšek, Karel; Ružiak, Ivan

doi:10.5772/48181

Cited by 11 publications

(10 citation statements)

References 3 publications

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“…The SlideWheel system is built directly for the experimental vehicle. The dominant element in relation to the flexibility of the SW system and the noise emitted during the drive are the support wheels, where the determination of their radial stiffness is detailed in [2] and the noise emitted in [13]. We used a slalom test drive to verify the behaviour of the vehicle with the SW system.…”

Section: Methodsmentioning

confidence: 99%

“…The speed v, slip angle ϕ and the vehicle turning speed ω were measured using the Correvit. The steering wheel turning angle β v was measured by an analogue cable position sensor, which was wound on the steering column and further calculated according to relation (2). The longitudinal a y and longitudinal a x acceleration using the acceleration sensor and the body pitch angle β i were calculated from the signals of a pair of ultrasound distance sensors located at the place of the centre of gravity along the sides of the car.…”

Section: Methodsmentioning

confidence: 99%

“…With regard to the advent of self-driving road vehicles, it is necessary to put great emphasis on the road safety. Safety is largely affected by the driver's skills, car design maturity [1], tyre quality [2] and, last but not least, the maintenance level and quality [3;4]. In any case, there are always the laws of physics that even state-of-the-art electronic systems are not able to get around [5].…”

Section: Introductionmentioning

confidence: 99%

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System allowing adhesion force change of road vehicle

Jilek

Šefčík

Verner

et al. 2019

Engineering for Rural Development

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Bringing the car into a skid is realised by the adhesion force decrease. This can be reached either by a coefficient of adhesion decrease or decrease of a radial reaction on the vehicle's wheel. For the purpose to the vehicle's behaviour change according to stability we chose the way of radial reaction change. To decrease the adhesion force transferred by the vehicle's wheels, the required part of radial reaction of a particular vehicle's wheel was transferred to the road, out of the vehicle's wheels, using additional auxiliary wheels. The auxiliary wheel units are connected to suspension arms. The article contains individual currently used ways for the adhesion force change and the unique way in the form of the system SlideWheel designed by the authors. The system SlideWheel, which was designed by the authors of this article, consists of three circuits. The first circuit is the mechanical part of the wheel unit, the second one is designed in the form of a hydraulic system and the third circuit is an electrical system used to control the wheel unit's lift through the hydraulic system. The system was designed to be used for experimental measurement purposes in education in order to experimentally simulate oversteer or understeer of the vehicle. The real measured data from a particular drive test are stated and evaluated in the conclusion. The measurement is implemented on a special experimental vehicle equipped with the SlideWheel system. Based on the experimental measurements, we have come to the conclusion that using the SW system, it is possible to change the adhesion force of a road vehicle.The paper deals with a new system for radial reaction change of vehicle wheels. This system has minimal added weight to the vehicle. At the same time, none of the components exceeds the ground plan of the vehicle. With the newly created system, it is possible to reduce radial reactions on any car wheel. The measured results are consistent with the vehicle's ride on sliding surfaces.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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System allowing adhesion force change of road vehicle

Jilek

Šefčík

Verner

et al. 2019

Engineering for Rural Development

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“…Radial tire for passenger vehicles can be classified as polycomponent composite with a rubber matrix reinforced with textile and steel cords [2]. The structure parts applied into these tires are the textile carcass, textile overlap belt and steel-cord belt.…”

Section: Report Is Closely Related To the Contribution Composites Witmentioning

confidence: 99%

Tire casings and their material characteristics for computational modeling of tires

Krmela¹,

Krmelová²

2017

Engineering for Rural Development

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Abstract. The report is focused on determination of the material parameters from experimental data, which will be used as input data to computational modeling of radial tires for passenger vehicles. It is necessary to have knowledge about the geometry, material parameters, cross-section and structure of tire casing (number of layers of the belt and carcass, information about the bead and cap ply) for creation of computational models of tire casing for stress-strain analysis of a tire under vertical load, modal analysis etc. The tire casing parts in computational models are partially replaced with material and geometrical parameters with specified stiffness. The Finite Element Method using the program system ANSYS is applied to the computational modeling. The experiments of total tires are needed for verification analyses between computational results and experimental data. The experiments of parts of the tire casing such as parts of tread and next rubber parts of tire are needed for determination of the parameters of constitutive models of rubber elasticity such as the parameters of hyperelastic Mooney-Rivlin model. The report describes the result for two tires 165/65 R13 and 215/40 R17 as samples. The structures of the tire-crown with geometrical and material parameters are presented. The authors used orthotropic material parameters for determination of the structure parts of tire as the steel-cord belt. The values of modules of elasticity and Poisson ratios are presented for 165/65 R13. The orthotropic material parameters for definition of the tire-crown of 215/40 R17 are determined as input data to the computational model of tire.

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“…The design shapes and material properties characterized by low hysteretic losses as well as a construction have an influence on the driving comfort, adhesion, wear resistance and fatigue resistance [1]. Thick fibre reinforced composites are used extensively in rubber products such as tires and conveyer belts.…”

Section: Introductionmentioning

confidence: 99%

On Shearography Testing of Tires Separations

Hajská¹,

Koštial

Kodym

et al. 2015

Mechanical and Materials Engineering of Modern Structure and Component Design

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The paper deals with the systematic experimental study of tires wear accompanied by separation created in tires of different construction exposed to dynamic loading. 12 pieces of tires with the dimensions of 225/75 R 16 C with the same tread pattern were manufactured for the test in order to examine the impact on the material and design changes on the spread of separations in a tire. The atlas of separation is presented. The results of separation detection obtained by contact-less shearography are compared with those of optical. Graphic relevant analysis of tire wearing process is effectuated.

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The Chosen Aspects of Materials and Construction Influence on the Tire Safety

Abstract: The work has been supported by the Czech grant projects MPO FR-TI3/818 (sponsored by the Ministry of Industry and Trade of the Czech Republic) and by the Slovak-Czech grant project 7AMB12SK126 (sponsored by the Ministry of Education, Youth and Sports of the Czech Republic).

Cited by 11 publications

References 3 publications

System allowing adhesion force change of road vehicle

System allowing adhesion force change of road vehicle

Tire casings and their material characteristics for computational modeling of tires

On Shearography Testing of Tires Separations

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