| 基于电磁检测原理的疲劳裂纹检测方法 |
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| 引用本文： | 曹益平,李路明,黄刚,董婕,郝红伟,谢宜学.基于电磁检测原理的疲劳裂纹检测方法[J].清华大学学报(自然科学版),2005,45(11):1453-1455. |
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| 作者姓名： | 曹益平 李路明 黄刚 董婕 郝红伟 谢宜学 |
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| 作者单位： | 清华大学,机械工程系,北京,100084;万杰集团有限公司,淄博,255213 |
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| 基金项目： | 国家自然科学基金资助项目(50371045) |
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| 摘 要： | 为了适应比较恶劣的疲劳裂纹检测环境,如工件表面附有涂层或者附有腐蚀残留物的情况,提出了一种基于电磁检测原理的疲劳裂纹检测方法。该方法中采用自激振荡激励原理和两路信号处理方式。对带有人工缺陷的45#钢试样的检测结果表明,与常规方法相比,在相同的条件下灵敏度可以提高3 dB以上,提离效应得到了抑制。用该方法可检测出0.8mm涂层下深度为0.1mm的人工表面裂纹缺陷。
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| 关 键 词： | 疲劳裂纹 电磁检测 提离 自激振荡 |
| 文章编号： | 1000-0054(2005)11-1453-03 |
| 修稿时间： | 2004年10月19 |
Fatigue crack detection based on electromagnetic testing |
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| CAO Yiping,LI Luming,HUANG Gang,DONG Jie,HAO Hongwei,XIE Yixue.Fatigue crack detection based on electromagnetic testing[J].Journal of Tsinghua University(Science and Technology),2005,45(11):1453-1455. |
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| Authors: | CAO Yiping LI Luming HUANG Gang DONG Jie HAO Hongwei XIE Yixue |
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| Institution: | CAO Yiping~1,LI Luming~1,HUANG Gang~1,DONG Jie~1,HAO Hongwei~1,XIE Yixue~2 |
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| Abstract: | Fatigue cracks must often be measured in bad testing environments where the work piece facet is coated by corrosion.Therefore,electromagnetic testing based on the self-excitation oscillation principle with two-dimensional signal processing was developed to detect fatigue cracks in bad environments.A 45~# steel specimen with artificial defects was used to verify the method.The results show that the sensitivity of the method is more than 3 dB better than conventional methods for the same conditions while lift-off effects are reduced.A 0.1 mm deep artificial surface defect covered by a 0.8 mm thick coating can be detected by the method. |
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| Keywords: | fatigue crack electromagnetic testing lift-off self excitation oscillation |
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