| 摘要 |
<p>The invention relates to improving the endurance of the beads of a radial tire for a heavy civil engineering vehicle, by decreasing the spread rate of the cracks initiated at the end of the carcass reinforcement frame and spreading through the polymeric covering, edging and filling materials. According to the invention, a transition element (25) consisting of a polymeric transition material is at least partially in contact, via the axially outer surface thereof, with the polymeric edging material (22) and, on the axially inner surface thereof, with a polymeric filling material (23b); the radially outer (E25) and radially inner (I25) ends of the transition element are radially outside and radially inside the end of the carcass reinforcement frame, and the modulus of elasticity at 10% elongation of the polymeric transition material is intermediate between the moduli of elasticity at 10% elongation of the polymeric edging material and polymeric filling material, respectively, with which the transition material is in contact.</p> |
