PROBLEM TO BE SOLVED: To provide an estimation method of a block breakage due to a sipe of a tire.SOLUTION: This endurance test method includes: a deterioration step of deteriorating a tire whose tread surface is formed with a sipe; a travelling step of causing the tire subjected to this deterioration step to travel; and an observation step of observing the generation of a crack of the sipe of the tire subjected to the travelling step. In this deterioration step, the tire is exposed to the atmosphere of 70°C or more and 100°C or less for the period of two days or more and 14 days less. In this travelling step, the air is filled with normal inner pressure, and a predetermined load of 0.6 times or more and 0.8 times less of the standard maximum load F is added to the tire, and a predetermined slip angle of 1° or more and less 4° is imparted to the tire, and the tire is made to travel at a speed of 50 km/h or more and less 70 km/h. In this observation step, whether or not a crack occurs in the sipe is observed.

    【課題】タイヤのサイプに起因するブロック欠けの評価方法の提供。【解決手段】この耐久試験方法は、トレッド面にサイプが形成されたタイヤが劣化させられる劣化工程と、この劣化工程を経たタイヤが走行させられる走行工程と、走行工程を経たタイヤのサイプのクラックの発生が観察される観察工程とを備えている。この劣化工程では、タイヤが70℃以上100℃以下の雰囲気で2日以上14日以下の期間曝されている。この走行工程では、正規内圧で空気が充填されて、規格最大荷重Fの0.6倍以上0.8倍以下の所定の荷重が付加され、1?以上4?以下の所定のスリップ角が付与され、50km/h以上70km/h以下の所定の速度で走行させられている。この観察工程では、サイプにクラックが発生しているか否かが観察されている。【選択図】図5


    Access

    Download


    Export, share and cite



    Title :

    ENDURANCE TEST METHOD FOR TIRE


    Additional title:

    タイヤの耐久試験方法


    Contributors:

    Publication date :

    2015-08-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / B60C VEHICLE TYRES , Fahrzeugreifen



    Speed and Load Programming of Endurance Type Tire Test Machines

    Bock, Richard L. | SAE Technical Papers | 1970


    Heavy duty tire with improved endurance

    European Patent Office | 2019

    Free access

    Heavy duty tire with improved endurance

    KIM NAM JIN | European Patent Office | 2019

    Free access

    super-endurance balance car solid tire

    WU XILIN / HE JUN / ZHANG JUNTIAN | European Patent Office | 2021

    Free access

    Determination of Passenger Tire Performance Levels Tire Strength and Endurance

    Vukan, F. S. / Kuebler, T. P. | SAE Technical Papers | 1969