| 摘要 |
<p>The invention relates to improving the endurance of the beads of a radial tire for a heavy civil engineering vehicle, by reducing the spread rate of the cracks initiated on the axially outer surface of the carcass reinforcement frame and spreading through the polymeric covering and filling materials. According to the invention, a transition element (28) consisting of a polymeric transition material is in contact, via the axially inner surface thereof, with the polymeric covering material of the axially outer surface of the carcass reinforcement frame (21b), and, via the axially outer surface thereof, with the polymeric filling material (26), and the modulus of elasticity at 10% elongation of the polymeric transition material lies between the moduli of elasticity at 10% elongation of the polymeric covering material and polymeric filling material, respectively.</p> |
