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Comparative analysis of small size non-pneumatic tires and pneumatic tires - radial stiffness and hysteresis, selected parameters of the contact patch

Jackowski Jerzy, Żmuda Marcin, Wieczorek Marcin

Eksploatacja i Niezawodność

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2023

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Vol. 25, no. 3

art. no. 167362

EN

Nowadays, non-pneumatic tires are becoming an increasingly likely alternative to pneumatic tires. The function of compressed air has been taken over by the belt and the elastic structure (materials used and shape of the components). The research presented in the paper was carried out in quasi-static conditions. The research's aim was to compare the radial stiffness, hysteresis and selected parameters of the contact patch of two non-pneumatic tires and four pneumatic tires used interchangeably in ATVs/UTVs. The analyzed non-pneumatic tires are characterized by greater radial stiffness than pneumatic tires of the same size. Moreover the wheel with a cellular structure has the highest hysteresis of the radial characteristics of the tested wheels and the highest values of the unit pressure in the area of contact patch. The paper also verified two methods of calculating the contact patch length of non-pneumatic tires.

2

Analiza budowy kół bezciśnieniowych

Żmuda Marcin

Biuletyn Wojskowej Akademii Technicznej

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2021

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Vol. 70, nr 1

111--123

PL

Koła bezciśnieniowe nie są nowym rozwiązaniem. Pierwsze informacje na ich temat ukazywały się przed wynalezieniem opon pneumatycznych. Odpowiednia konstrukcja oraz dobór materiałów elastycznej struktury i opasania współczesnych kół bezciśnieniowych mają odwzorować funkcję sprężonego powietrza opony pneumatycznej. Wspomniane elementy składowe koła będą decydowały o charakterze przenoszenia obciążeń. Obecnie dominującą formą elastycznej struktury są pojedyncze szprychy oraz struktura komórkowa zbudowana z wieloboków. Opasanie zawiera co najmniej jedną warstwę wzmocnienia z nierozciągliwego materiału. Liczba warstw wzmocnienia oraz ich ukształtowanie będą wpływać na zachowanie się koła podczas obciążenia.

EN

Non-pneumatic tires are not a new construction. The first information about them appeared before the invention of pneumatic tires. appropriate materials and design for flexible structure and band of modern non-pressure wheels are designed to mimic the functions of compressed air of a pneumatic tire. Mentioning the elements of the wheel structure will determine the nature of the load carrying. Mentioning the elements of the wheel structure will determine the nature of the load transfer. Currently, the dominant form of flexible structure are: single spokes and a cellular structure made of polygons. The band comprises at least one reinforcement layer of inextensible material. The number of reinforcement layers and their shape will influence the behaviour of the wheel during loading.

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Energy consumption estimation of non-pneumatic tire and pneumatic tire during rolling

Jackowski J., Wieczorek M., Żmuda M.

Journal of KONES

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2018

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Vol. 25, No. 1

159--168

EN

The characteristics of the car tire, and especially its deformation and interaction road, are mainly factors affected the energy consumption of the vehicle and consequently the amount of fuel consumption and emissions to the environment the harmful exhaust gas components. It is estimated that approximately 80-90% of the total energy losses (rolling resistance) are due to internal tire friction, which occurs during its deformation, the remaining 10-20% are ventilation losses, tread face interaction with the road surface and cyclical compression and expansion of air enclosed in the tire. Non-pneumatic tires (NPT) (as a direction of development) are the alternative solutions for conventional tires. Their advantages are as follows maintenance-free and the resistance to typical for pneumatic tires mechanical damages can be a major cause of their widespread use in future (and thus electric) cars. In the available publications, the results of the estimation of the features NPT based on numerical simulations are only presented. There is lack of experimental research results concerning real objects, which determine their driving properties. Presented work is an attempt to check how the change in wheel structure affects the energy consumption of rolling wheels. Research objects (non-pneumatic tire and pneumatic tire) were selected for the size and destination compatibility. Experimental research were carried out at a universal quasi-static tire testing station, which is located at the Institute of Mechanical Vehicles and Transport at the Department of Mechanical at the Military University of Technology. According to the authors, the obtained results can be an interesting and unique supplement to the problem of assessing the properties of new and future (non-pneumatic tire) construction of vehicle wheels.