| 曾鑫磊,万强,陈文彰,晏顺坪,李越,任淑廷,解社娟*,陈振茂.基于方向性探头的双轴塑性变形定量涡流检测研究[J].实验力学,2024,39(2):168~182 |
| 基于方向性探头的双轴塑性变形定量涡流检测研究 |
| Research on quantitative eddy current testing of biaxial plastic deformation based on a directional probe |
| 投稿时间：2023-03-03 修订日期：2023-05-03 |
| DOI：10.7520/1001-4888-23-045 |
| 中文关键词: 奥氏体不锈钢 双轴塑性变形 电磁属性 涡流检测 品字形探头 |
| 英文关键词:austenitic stainless steel biaxial plastic deformation electromagnetic properties eddy current testing pancakes probe |
| 基金项目:国家自然科学基金项目(NSAF: U2130206，NSFC: 12222207、51877163); 中央高校基本科研业务费(xtr042020013) |
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| 中文摘要: |
| 核电结构服役过程中，构件可能由于地震等意外载荷产生塑性变形，危害结构安全。实际构件的受力变形大多是复杂的双轴，目前对双轴塑性变形的检测研究尚较少。本文针对核电站中典型的奥氏体不锈钢材料，在基于其单轴塑性变形和电磁属性关系的基础上，首先结合莫尔圆理论建立双轴塑性变形条件下材料的周向电磁属性分布计算公式，并进行了实验验证，同时基于实验结果得到切应变对电导率影响较小的结论；然后，提出三相品字形方向性探头构型，通过数值模拟分析其检测机理，基于皮尔逊相关系数建立双轴塑性变形定量涡流检测方法，并对该方法进行了数值验证；最后，制作品字形传感器，搭建实验系统，进而通过实验验证了本研究所开发的双轴塑性变形定量检测方法的有效性。 |
| 英文摘要: |
| During the operation of nuclear power plant structures, components can undergo plastic deformation due to unexpected loads such as earthquakes, which can pose a threat to the structural safety. The stress deformation of actual components is often complex biaxial deformation, and there is currently limited research on biaxial plastic deformation detection. This paper focused on the typical austenitic stainless steel material in nuclear power plants. Based on the relationship between its uniaxial plastic deformation and electromagnetic properties and combined with the Mohr circle theory, the circumferential electromagnetic property distribution calculation formula of the material under biaxial plastic deformation conditions is established and experimentally verified. Furthermore, the conclusion that cutting strain has little effect on conductivity is drawn based on experimental results. A three-phase pancake directional probe configuration is proposed, and the detection mechanism is analyzed by numerical simulation. Based on the Pearson correlation coefficient, a biaxial plastic deformation quantitative eddy current detection method is established, which is numerically validated. Finally, a pancake sensor is fabricated, an experimental system is set up, and the effectiveness of the biaxial plastic deformation quantitative detection method developed in this study is verified through experiments. |
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