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<p>Bead fatigue failure in mountainous conditions poses a critical threat to driving safety. This study aims to enhance the durability of light truck tires by proposing maximum strain energy density amplitude as a fatigue damage parameter. A fatigue life prediction method for the bead region was established and validated through drum endurance testing combined with finite element analysis. To simulate the complex loading conditions encountered in mountainous terrain, this study systematically analyzed the influence mechanisms of load, inflation pressure, longitudinal force, lateral force, and the coupled effects of longitudinal and lateral forces on bead fatigue life. Results indicate that increased load significantly shortens fatigue life, with low inflation pressure at rated load reducing life by up to 88.2 %. Longitudinal force exerts a relatively minor effect on fatigue life, while lateral force reduces it by approximately 4.1 %. Furthermore, the fatigue life of the bead under coupled forces is significantly lower than under single-force conditions, indicating that the interaction between longitudinal and lateral forces partially offsets the detrimental effects of either force acting alone.</p>

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Research on the effect of tire forces on the fatigue life of the tire bead region

  • 期刊论文

  • 发表日期：

    2026年5月29日

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  • Chaoshun Zhang,
  • Chen Liang,
  • Lin Bai

摘要

Bead fatigue failure in mountainous conditions poses a critical threat to driving safety. This study aims to enhance the durability of light truck tires by proposing maximum strain energy density amplitude as a fatigue damage parameter. A fatigue life prediction method for the bead region was established and validated through drum endurance testing combined with finite element analysis. To simulate the complex loading conditions encountered in mountainous terrain, this study systematically analyzed the influence mechanisms of load, inflation pressure, longitudinal force, lateral force, and the coupled effects of longitudinal and lateral forces on bead fatigue life. Results indicate that increased load significantly shortens fatigue life, with low inflation pressure at rated load reducing life by up to 88.2 %. Longitudinal force exerts a relatively minor effect on fatigue life, while lateral force reduces it by approximately 4.1 %. Furthermore, the fatigue life of the bead under coupled forces is significantly lower than under single-force conditions, indicating that the interaction between longitudinal and lateral forces partially offsets the detrimental effects of either force acting alone.