STUDY THE EFFECT OF STEEL WIRES PRE-TENSION ON THE BENDING AND ADHESION PROPERTIES OF BEAD PLY IN RUBBER TIRES

Ahmed Kadhem,Ali Yasir,Mujid Enad

doi:10.30572/2018/kje/090305

Abstract

Tires are considered important components of the vehicle by which the vehicle can move on the road. The continuous development in the transportation requires improving tires to suit the modern requirements of the transportation. This work includes studying the effect of using the pre - tension technique to improve the flexural and adhesion properties of bead ply in rubber tires. Pre-tension levels ranging between (0- 1250 MPa) were applied on each single reinforcing wire at room temperature before the vulcanization process. The results showed that the increasing in maximum bending strength, bending stiffness, and maximum shear strength by (26 %) due to pre-tension. The single fiber pull-out test results show that the debond shear strength was increased by (27 %) pre-tension on steel wires.

Highlights

The tire is one of the vehicle components which bordering the ground and it consists of many parts
The bead ply is the internal brink of the tire that embraces the wheel rim and presses against the bead seat
Bead failure can be dangerous because it can cause a sudden air pressure drop in the tubeless tire and separation of the tubeless tire from the wheel rim leading to loss of control on the vehicle causing a regrettable accident

Summary

INTRODUCTION

The tire is one of the vehicle components which bordering the ground and it consists of many parts. Bead failure can be dangerous because it can cause a sudden air pressure drop in the tubeless tire and separation of the tubeless tire from the wheel rim leading to loss of control on the vehicle causing a regrettable accident This location and function are exposing the tire bead to many forces and stresses so that the bead was reinforced with high strength steel wires that its chemical composition shown in Table 1 (Doradle et al, 2005; Burton, 1954). Preparation of test specimens The bending test specimens were rectangular in shape with dimensions of (L=110 mm, w=12 mm, and t=3 mm) according to ASTM standards D790-00 as shown in Fig. 4 and Fig. 5. The result of each single wire was recorded (Standard ASTM D790-00, 2004; Standard ASTM D1871-98, 2004)

Calculations 1- Bending stress

RESULTS AND DISCUSSION

CONCLUSION