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激光超声表面波在表面缺陷上的反射与透射

Reflection and Transmission of Laser Ultrasonic Waves on Surface Defects

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摘要

采用激光超声可视化技术研究了脉冲激光激励的表面波在不同深度缺陷上的反射和透射,实验得到了表面波在缺陷处的可视化声场。研究结果表明,随着缺陷深度的增大,表面波的反射系数先增大后平缓变化,透射系数先减小后平缓变化。研究结果为裂纹深度的激光超声表面波检测奠定了实验基础。

Abstract

The laser ultrasonic visualization technology is used to study the reflection and transmission of pulsed laser excited surface waves on the defects with different depths. The visualized sound field of the surface wave at the defects is obtained experimentally. The research results show that as the defect depth increases, the reflection coefficient of surface wave first increases and then changes steadily, and however the transmission coefficient first decreases and then changes smoothly. These research results lay an experimental foundation for the quantitative detection of cracks by laser ultrasonic surface waves.

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中图分类号:TB551

DOI:10.3788/lop56.041203

所属栏目:仪器,测量与计量

基金项目:国家自然科学基金(51705470)、 河南省重点研发与推广专项(182102210009)、 河南省高等学校重点科研项目(18A460032)

收稿日期:2018-09-05

修改稿日期:2018-09-13

网络出版日期:2018-09-18

作者单位    点击查看

杨连杰:郑州大学机械工程学院, 河南 郑州 450001
李阳:郑州大学机械工程学院, 河南 郑州 450001抗疲劳制造技术河南省工程实验室, 河南 郑州 450001
孙俊杰:郑州大学机械工程学院, 河南 郑州 450001抗疲劳制造技术河南省工程实验室, 河南 郑州 450001
邹云:郑州大学机械工程学院, 河南 郑州 450001抗疲劳制造技术河南省工程实验室, 河南 郑州 450001

联系人作者:李阳([email protected])

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引用该论文

Yang Lianjie,Li Yang,Sun Junjie,Zou Yun. Reflection and Transmission of Laser Ultrasonic Waves on Surface Defects[J]. Laser & Optoelectronics Progress, 2019, 56(4): 041203

杨连杰,李阳,孙俊杰,邹云. 激光超声表面波在表面缺陷上的反射与透射[J]. 激光与光电子学进展, 2019, 56(4): 041203

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