复合材料的多变量损害评估使用声波发射.
Matthew Gee1, Sanaz Roshanmanesh1, Farzad Hayati1
1School of Metallurgy and Materials, University of Birmingham, Birmingham B15 2TT, UK.
Sensors (Basel, Switzerland)
|June 27, 2025
概括
本研究引入了一种新的声辐射 (AE) 方法,用于实时检测纤维增强聚合物 (FRP) 的损伤. 这种先进的技术能够识别出五种不同的损伤类型,从而能够更早,更准确地进行结构健康评估.
科学领域:
- 材料科学 材料科学 材料科学
- 结构健康监测 结构健康监测
- 非破坏性测试是指非破坏性测试.
背景情况:
- 纤维增强聚合物 (FRP) 具有出色的机械性能,但具有复杂的损伤机制.
- 传统的检查方法难以检测异型FRP中的多样化和同时损坏模式.
- 声辐射 (AE) 技术对结构健康监测有前途,但需要先进的分析.
研究的目的:
- 开发和验证一种新的实时方法来描述和定量评估FRP中的损害,使用AE.
- 在碳纤维复合材料中区分和识别多个同时发生的损伤机制.
- 改进早期检测和评估关键损坏事件,以提高结构完整性.
主要方法:
- 实施对声辐射 (AE) 信号的多变量频率评估.
- 应用快速里埃转换 (FFT) 来分析AE数据中的多个频率峰值.
- 用波形变换方法进行比较分析,用于验证和性能基准测试.
主要成果:
- 根据特定的频率范围,成功确定了碳纤维复合材料中五种不同的损伤机制:矩阵裂纹 (100-200 kHz),分层 (205-265 kHz),解 (270-320 kHz),纤维断裂 (330-385 kHz) 和纤维拔出 (395-490 kHz).
- 早期检测到关键损伤,与传统技术相比,分层检测到的时间大约是28秒.
- 提供了对FRP结构健康的更准确的定量评估.
结论:
- 拟议的多变量频率评估方法在基于AE的FRP损害检测方面取得了重大进展.
- 这种技术可以及时识别和描述多种损伤模式,这对结构完整性至关重要.
- 这些发现促进了大型FRP结构的积极维护,提高了可靠性并降低了运营成本.
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