基于高频EMAT的反沉头接接头的近表面缺陷检测
Shuchang Zhang1, Jiang Xu1, Xin Yang1
1School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China.
Materials (Basel, Switzerland)
|June 10, 2023
概括
高频电磁声学传感器 (EMAT) 能够有效地检测反沉头钉接头 (CHRJ) 的近表面缺陷. 在缺陷深度和反射系数之间发现了线性相关性,使得在航空航天和海洋应用中能够精确评估缺陷.
科学领域:
- 材料科学 材料科学 材料科学
- 非破坏性测试 不破坏性测试
- 机械工程 机械工程
背景情况:
- 反沉头钉接头 (CHRJ) 是航空航天和海洋结构中的关键组件.
- 在CHRJ中的应力度可能导致近表面缺陷,需要可靠的检查方法.
研究的目的:
- 使用高频电磁声学传感器 (EMAT) 检测CHRJ的近表面缺陷.
- 分析缺陷特征与超声波传播之间的关系.
- 建立一个量化方法来评估缺陷深度.
主要方法:
- 使用反射和传输理论进行超声波传播分析.
- 有限元模拟用于研究缺陷对超声波能量分布的影响.
- 实验验证使用10MHz EMATs对具有受控缺陷的CHRJ样品进行实验验证.
- 波段值表示用于信号增强.
主要成果:
- 模拟确定了第二个缺陷回声作为检测的关键指标.
- 模拟了反射系数和缺陷深度之间的正相关性.
- 实验结果证实了反射系数和缺陷深度之间的线性正相关性.
- 高频EMAT在检测近表面缺陷方面表现出有效性.
结论:
- 高频EMAT提供了一种可行的方法,用于检测CHRJ的近表面缺陷.
- 建立的相关性允许对缺陷深度进行定量评估.
- 这种技术提高了关键钉结构的安全性和完整性.
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