The experimental measurement of the tyre casing defects for the freight vehicles at the dynamic loading

Ján Vavro,Jakub Híreš,Petra Kováčiková,M Vasko,M Blatnická,L Jakubovičová,M Sága,P Kopas,O Štalmach,V Baniari,M Handrik,A Sapietová

doi:10.1051/matecconf/201815705022

Abstract

The paper deals with the experimental measurement of the tyre casing defects for the freight vehicles at the dynamic loading. The given investigation was mainly focused on cracks and defects in tyre casing, which is commonly used for freight vehicles. The mentioned measurement or investigation was performed under the strictly specified conditions. The given measurement of crack propagation in car tyre casing was based on changes of speed, changes of loading as well as changes of service time interval. It is important to point out that the pressure in the tyre was predetermined to be the constant value. The experimental procedures were carried out by help of special drum testing machine with designation: IGTT 25 kN – C and with the 1707 mm drum diameter. The mentioned measurement was performed for the area of tyre casing shoulder and it was in the site between the first and the second buffer lining. Using the ITT-1 program relating to non-destructive testing analyser, the CCD camera for testing procedure of tyre casing was used for the camera images which were taken from the internal side of the tyre casing.

Highlights

The effort to improve the road-traffic safety leads to systematic enhancement of tyres
Destructive as well as non-destructive methods can be used for investigation and they help us to find defects occurring in new, re-treaded as well as old and worn-down tyres
Real disadvantage in relation to destructive methods is closely connected with the fact that the given tyre casings which are tested by destructive method

Summary

Introduction

The effort to improve the road-traffic safety leads to systematic enhancement of tyres. Failures, separations in a tyre casing can be done by several methods. Destructive as well as non-destructive methods can be used for investigation and they help us to find defects occurring in new, re-treaded as well as old and worn-down tyres. It means that destructive methods are difficult from these aspects: from the economic aspect, because destructive testing means usage of high number of tested tyres, from the aspect of preservation of specific homogeneity for sample

Structure of the tyre casing

Descriptions of tyre defects

The process of measurement by help of non-destructive analyser

Conclusion