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| 基于光纤光栅传感的金属材料裂纹扩展检测研究 |
| Research on Crack Propagation Detection of Metal Materials Based on Fiber Bragg Grating Sensing |
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| DOI：10.16018/j.cnki.cn32-1650/n.202304006 |
| 中文关键词: 损伤监测 光纤布拉格光栅 疲劳裂纹扩展 裂纹定位 |
| 英文关键词: damage monitoring fiber bragg grating fatigue crack propagation crack localization |
| 基金项目: |
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| 摘要点击次数: 37 |
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| 中文摘要: |
| 为快速、准确地检测金属材料中的裂纹，避免严重事故和重大经济损失，介绍了一种基于光纤布拉格光栅传感器的金属材料裂纹检测方法。该方法利用光纤布拉格光栅的高灵敏度和优良的光学传感特性，将光纤布拉格光栅传感器通过胶封装方式粘贴在含预制裂纹的金属试件上，通过拉伸试验获得金属材料扩展过程中的应力-应变关系，发现在裂纹扩展路径上，裂纹近端产生的应变小于远端产生的应变，即裂纹逐渐向传感器远端的方向扩展，从而实现了对金属材料裂纹扩展的实时监测和定位。 |
| 英文摘要: |
| In order to quickly and accurately detect the cracks in metal materials and avoid serious accidents and great economic losses, a crack detection method of metal materials based on fiber bragg grating sensor is introduced. This method utilizes the high sensitivity and excellent optical sensing characteristics of fiber Bragg gratings to attach fiber Bragg gratings sensors to metal specimens containing prefabricated cracks through adhesive encapsulation. The stress-strain relationship during the metal material propagation process was obtained through tensile tests. It was found that the strain generated at the near end of the crack was smaller than that at the far end of the crack on the crack propagation path, meaning that the crack gradually propagated towards the direction of the fiber Bragg gratings sensor at the far end, thus achieving real-time monitoring and localization of crack propagation in metal materials. |
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