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COUPLING ANALYSIS OF FRACTURE MECHANICS AND DAMAGE MECHANICS FOR FIBER-REINFORCED ASPHALT CONCRETE PAVEMENT

机译:纤维沥青混凝土路面的断裂力学与损伤力学耦合分析

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摘要

The initial damage and fracture zone are determined by the approach of coupling analysis of fracture mechanics and damage mechanics. An optimum fiber content of 0.2% in the asphalt concrete is proposed in comparison of the results obtained from composite theory with that obtained from the splitting tests. Crack growth with number of load cycles and fiber mass fraction of asphalt concrete pavement in which an initial surface crack of 4 cm length is included under cyclic temperature loading (-15℃) is simulated using damage mechanics theorem. By computing fatigue life, a new type of fiber-reinforced asphalt concrete pavement is developed.
机译:初始损伤和断裂带是通过断裂力学和损伤力学的耦合分析方法确定的。结合复合理论和劈裂试验的结果,提出了沥青混凝土中0.2%的最佳纤维含量。利用损伤力学定理,模拟了沥青混凝土路面在循环温度荷载(-15℃)下初始表面裂缝为4 cm长的情况下,荷载循环次数和纤维质量分数引起的裂纹扩展。通过计算疲劳寿命,开发了一种新型的纤维增强沥青混凝土路面。

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