锻压技术

基于振动红外热像技术的承压材料裂纹检测

英文标题：Crack detection of pressure-bearing material based on vibration infrared thermal imaging technology

作者：董丽虹向明王海斗郭伟王博正高治峰

单位：陆军装甲兵学院

分类号：TG115.28

出版年,卷(期):页码：2019,44(6):127-133

摘要：

为及时发现承压设备裂纹缺陷，采用振动红外热像技术以及ABAQUS有限元模拟软件分别进行实验和模拟研究。实验结果表明，裂纹处能明显看到生热现象，且当激励时间超过2 s时对检测效果影响不大。模拟结果表明：激励振幅越大，检测效果越好，过大的激励振幅会导致样品的损伤，试样的最佳激励振幅为8~10 μm；激励时间越长，裂纹温升越高，检测效果越好，过长的激励时间也会导致试件的损伤和能量的浪费，试样的最佳激励时间为1 s左右；激励频率与裂纹的振动生热并不成正相关或负相关，当试件裂纹区域振动最剧烈时生热最多，如共振频率。

In order to find the crack defects of the pressure-bearing equipment in time, the experiment and simulation were conducted by the vibration infrared thermal imaging technology and finite element simulation software ABAQUS, respectively. The experiment results show that the heat generation phenomenon can be clearly seen at the crack, and it has little effect on the detection effect when the excitation time exceeds 2 s. The simulation results show that the larger the excitation amplitude is, the better the detection effect is. However, the excessive excitation amplitude causes damage to the sample, and the optimal excitation amplitude is 8-10 μm. Morever, the longer the excitation time is, the higher the crack temperature rise is, and the better the detection effect is. Furthermore, the excessive excitation time also leads to the damage of
specimen and the waste of energy, and the optimal excitation time is about 1 s. Meanwhile, the excitation frequency is not positively or negatively correlated with the vibrational heat generation of the crack, and when the vibration in the crack area of specimen is the most severe, the heat is most generated, such as the resonance frequency.

基金项目：

国家自然科学基金资助项目（51535011，51675532）

董丽虹（1972-），女，博士，副研究员 E-mail：lihong.dong@126.com

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