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基础岩纤维网的动态拉伸反应用于织增强砂 (TRM) 加强系统

Amrita Milling¹, Giuseppina Amato¹, Su Taylor¹

¹School of Natural and Built Environment, Queen's University Belfast, David Keir Building, Stranmillis Road, Belfast BT9 5AG, UK.

|January 25, 2025

概括

这项研究研究了用于结构改造的玄武岩纤维网. 动态拉力测试显示,在中等拉力速率下性能提升,使它们适合极端负载条件.

科学领域:

材料科学与工程材料科学与工程
土木工程土木工程是指土木工程.
结构健康监测结构健康监测

背景情况:

织增强砂 (TRM) 系统越来越多地用于结构改造.
了解基岩纤维网的动态拉伸性能对于它们在承受极端负荷的结构中的应用至关重要.
有限的实验数据存在于这些复合材料的高应变率行为.

研究的目的:

实验性地描述TRM系统中使用的玄武岩纤维网的动态拉力性能.
研究延展率对电网机械性能和故障机制的影响.
评估这些网格在动态负载条件下适用于改造结构的适用性.

主要方法:

使用高速伺服液压机器在准静态 (10−3s−1) 和中间 (18s−1) 张力率下对双向玄武纤维网进行拉伸测试.
高速数字图像对应 (DIC) 与MATLAB的"vision.PointTracker"用于变形分析.
扫描电子显微镜 (SEM) 用于对故障模式进行显微镜检查.

主要成果:

在不同的应变速率范围内观察到线性和非线性应变-应变行为.
在中等拉伸速率下,拉伸强度,最终拉伸和性 (1.42.3动态增强因子) 显著增加.
在纤维和聚合物涂层的故障模式中发现了应变率灵敏度,尽管有宏观的脆性故障.

结论:

岩纤维网在动态负载下表现出增强的拉力性能.
故障机制的应变率灵敏度有助于改善机械性能.
这些网格是用于装备需要抗极端事件的结构的可行材料.

关键词:

在FRCM中,FRCM是FRCM.TRM TRM 是一个很好的方法.盐纤维是一种基本纤维.计算机视觉计算机视觉动态的动态的动态.扫描电子显微镜扫描电子显微镜变种速率的变种速度是多少拉力测试拉力测试拉力测试织增强材料的使用

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