对经过冷解周期的织增强水泥复合材料进行非破坏性监测
Nicolas Ospitia1,2, Ali Pourkazemi3, Eleni Tsangouri1,4
1Department of Mechanics of Materials and Constructions, Faculty of Engineering, Vrije Universiteit Brussel, B-1050 Brussels, Belgium.
Materials (Basel, Switzerland)
|January 8, 2025
概括
在冷解周期下,用织物强化水泥复合材料的耐用性被使用非破坏性测试来评估. 毫米波谱法与超声波脉冲速度相结合,有效地绘制了内部损伤的地图,使早期检测和修复成本降低.
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.
- 非破坏性测试 不破坏性测试
背景情况:
- 混凝土材料面临来自机械和环境因素的耐用性挑战.
- 织增强混凝土 (TRC) 复合材料需要可靠的方法来评估长期性能,特别是对结解损害.
- 结解周期会诱导内部裂纹,并削弱TRC中的织物-矩阵键,降低刚度,需要早期检测.
研究的目的:
- 调查结合弹性和基于电磁波的非破坏性测试 (NDT) 的有效性,以监测TRC复合材料的冷解损伤.
- 建立一种可靠的方法,用于早期检测和全场监测TRC材料中的损伤进展.
- 探索毫米波 (MMW) 光谱的应用,以评估水泥复合材料的内部损伤.
主要方法:
- TRC标本经历了多达150次的冷解周期.
- 采用多模式的NDT映射,结合了主动弹性 (超声波脉冲速度 - UPV) 和基于电磁波 (毫米波 - MMW) 的方法.
- 在多个点进行传输测量以进行全面的损害评估.
主要成果:
- 多模式映射方法成功地跟踪了整个结解周期的损伤进展.
- 在TRC复合材料中的退化区域被准确地确定.
- 在此背景下首次使用的毫米波光谱学证明了其在损坏检测方面的潜力.
结论:
- 结合弹性和MMW NDT映射提供了一种全面的方法来监测TRC复合材料的冷解损伤.
- 通过全场监测及早发现损坏,可以大大降低维修成本.
- 这项研究突出了MMW光谱学的潜力,作为评估水泥材料耐用性的宝贵工具.
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