在多因素下,排水青混合物的多规模损坏和故障行为
Xiong Tao1,2, Tao Bai2, Jianwei Fan3
1Hubei Provincial Expressway Industrial Development Co., Ltd., Wuhan 430000, China.
Materials (Basel, Switzerland)
|November 13, 2025
概括
这项研究使用多尺度模拟研究了排水青混合物的故障. 基于间接拉力模块斜率的疲劳模型有效预测损坏,交通负载和水力动力压力显著影响混合物完整性.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 计算力学 计算力学 计算力学
背景情况:
- 排水青混合物对路面性能至关重要,但易受损坏和故障的影响.
- 了解各种因素下的多层次损伤机制对于改善混合物耐用性至关重要.
- 现有的疲劳模型需要对特定的青混合物特性进行验证.
研究的目的:
- 调查排水青混合物的多层次损伤和故障机制.
- 为了比较不同疲劳模型对这些混合物的适用性.
- 分析交通负载,水力动力压力,砂老化和界面衰减对混合物完整性的影响.
主要方法:
- 宏观的疲劳测试.
- 介面镜有限元素模拟.
- 微观分子动力学模拟.
- 基于应变,应力和间接拉力模块斜率的疲劳模型的比较分析.
主要成果:
- 使用间接拉力模块斜率的疲劳模型在各种空隙速率和分级中显示出高适用性.
- 当交通负载超过0.8 MPa时,损坏和故障的显著增加被观察到.
- 超过0.3MPa的水力动力压力明显促进了损伤和裂扩展,特别是在空隙和堆积物周围.
- 砂老化影响了损伤分布,而接口衰减导致了接口损伤增加和复杂的砂应力再分配.
- 结合的效应决定了裂传播路径,导致有或没有砂覆盖的聚合物剥离.
- 范德瓦尔斯力控制了接口粘附;聚合物对水的亲和力比青削弱了粘附力.
结论:
- 基于间接拉力模块的疲劳模型非常适合排水青混合物.
- 交通负荷和水力动力压力是导致混合物损坏的关键因素.
- 接口特性和砂老化显著影响故障模式,对路面设计和维护产生影响.
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