用声辐射传感器增强结构健康监测:循环负荷下的复合材料的案例研究
1Korea Atomic Energy Research Institute, 111 Daedeok-daero 989-gil, Yusenong-gu, Daejeon 34057, Republic of Korea.
Sensors (Basel, Switzerland)
|January 23, 2024
概括
这项研究使用声辐射 (AE) 传感器监测玻璃纤维增强聚合物 (GFRP) 的故障. 一个新的Ibe_e值有效地追踪裂的增长,帮助评估结构完整性.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 非破坏性测试 不破坏性测试
背景情况:
- 织成的玻璃纤维增强聚合物 (GFRP) 在循环负荷下易受损坏.
- 监测GFRP的损坏进展对于结构完整性和安全性至关重要.
- 声波发射 (AE) 是检测复合材料损坏的一种有前途的技术.
研究的目的:
- 通过使用AE监测分析编织GFRP在循环负荷下的故障行为.
- 识别不同的故障模式及其AE信号特征.
- 引入和验证一个新的指标,Ib_e值,用于跟踪裂的发展.
主要方法:
- 在循环负荷下对织造GFRP进行破坏性测试.
- 使用声辐射 (AE) 传感器实时监测损伤进展情况.
- 分析AE信号,包括频率内容和统计参数.
- 引入和应用Ib_e值用于裂纹评估.
主要成果:
- 通过AE监测,通过AE监测确定了GFRP的明显故障模式.
- AE传感器有效地检测到与裂启动和生长相关的宽带频率信号.
- 在AE信号模式中观察到Felicity效应,这是复合材料的特征.
- 新的Ib_e-value在追踪裂发育从开始到增长方面表现出有效性.
结论:
- Ib_e值显示了评估复合材料结构完整性的巨大潜力.
- 了解Ib_e值随传播距离和频率依赖衰减的变化至关重要.
- 需要进一步的研究来完善评估指标和改进复合材料裂纹评估方法.
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