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首页> 外文会议>International Conference on Structures and Building Materials >Fatigue Analysis of the Asphalt Mixture Beam Using Damage Evolution Equations
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Fatigue Analysis of the Asphalt Mixture Beam Using Damage Evolution Equations

机译：损伤演化方程沥青混合束的疲劳分析

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Damage evolution equations of asphalt mixture specimen beams were analyzed using the fracture toughness index and the ultimate tension strain index, respectively. The fracture toughness of the asphalt mixture was calculated by FEM. Damage evolution equations controlled apart by the stress and the strain were given. Their coefficients were back-calculated using partial fatigue tests data. The fully coupled stress-damage method and the fully coupled strain-damage method were used. The life prediction precision of each equation was verified by residual fatigue tests data. The results show that FEM is effective to calculate the fracture toughness of the asphalt mixture. Two damage evolution equations have better life prediction abilities comparing with the S-N equation used usually.
机译：分别使用断裂韧性指数和最终张力应变指数分析沥青混合料梁的损伤演化方程。通过FEM计算沥青混合物的断裂韧性。给出了通过应力和应变分开控制的损伤演化方程。使用部分疲劳测试数据来回计算它们的系数。使用完全耦合的应力损伤方法和完全耦合应变损伤方法。通过残留疲劳测试数据验证了每个等式的生命预测精度。结果表明，有效计算沥青混合料的断裂韧性是有效的。两个损伤的演化方程具有更好的寿命预测能力与通常使用的S-N等式进行比较。

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