摘要
根据工程实际中对曲面零件裂纹缺陷检测的需求,开展曲面零件裂纹缺陷的涡流热成像定量检测仿真分析研究,建立凸面和凹面零件的检测仿真模型。运用COMSOL仿真平台的AD/DC模块和热传导模块对焦耳热效应和热传导进行了耦合仿真分析,给出不同裂纹深度下缺陷周边的温度场分布及温升变化曲线。通过Matlab对温度场分布进行图像处理和数值分析,给出缺陷深度与缺陷周边的温升变化的函数对应关系,为进一步开展零件裂纹的定量检测实验研究提供参考。
According to the requirement on crack detection of curve components in engineering practice, simulation on the quantitative test of crack on curve components with eddy current thermography was conducted. Simulation models of convex and concave components have been established. The models have been solved by integrating Joule heating and heat transfer with AD/ DC and general heat transfer modules of COMSOL platform. The simulation results of the patterns of temperature distribution around the crack have been obtained with a serial crack depth and the corresponding curves of temperature rise via heating time were presented. By processing the images of temperature distribution of the components with Matlab, the functions of temperature rise with crack depth have been carried out for convex and concave components respectively. The simulation results could be a valuable reference for further experiment study on crack quantitative test.
出处
《中国测试》
CAS
北大核心
2014年第2期27-30,共4页
China Measurement & Test
基金
国家自然科学基金项目(51275325)
教育部留学回国人员科研启动基金(20111139-10-8)
关键词
涡流热成像
无损检测
曲面零件
裂纹缺陷
仿真
eddy current thermography
non-destructive testing
curve component
crack defect
simulation
