Transactions of Materials and Heat Treatment

Title：Crack detection of pressure-bearing material based on vibration infrared thermal imaging technology

Authors： Dong Lihong Xiang Ming Wang Haidou Guo Wei Wang Bozheng Gao Zhifeng

Unit： Army Academy of Armored Forces

KeyWords： pressure-bearing material vibration infrared thermal imaging technology crack heat generation excitation parameters ABAQUS

ClassificationCode：TG115.28

year,vol(issue):pagenumber：2019,44(6):127-133

Abstract：

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.

Funds：

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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