Modeling and analysis of the influence of heating parameters on surface temperature signals
To study the influence of heating parameters, including heating pulse duration, heat flux density and heating energy, on surface temperature signals, a 2D model for carbon fiber reinforced plastic sample and a 3D model for aluminum sample were investigated and solved by finite element method (FEM). Calculation results show that the differential temperature between defect and sound areas depends on heating energy, and it gets greater while the heating energy increases. Maximum temperature contrast, differential temperature peak time and best observation time are less sensitive to the change of heat flux density, but affected by heating pulse duration. Maximum temperature contrast is less affected by heating parameters when materials are carbon fiber reinforced plastics (CFRP), so it has more relations to defects and can be used for quantitative analysis of defects. Great heat flux density and short heating pulse is a better choice for detecting defects in metal materials with greater thermal diffusivity, such as aluminum.
infrared thermographic nondestructive testing heating numerical simulation finite element method
Yingtao LIU Xingwang GUO Guangping GUO
Beijing Institute of Aeronautical Materials, 81#-6 Beijing 100095, China School of Mechanical Engineering and Automation, Beihang University, Beijing 100083, China
国际会议
第十七届世界无损检测会议(17th World Conference on Nondestructive Testing)
上海
英文
3900-3907
2008-10-25（万方平台首次上网日期，不代表论文的发表时间）