文献类型：期刊文献

英文题名：Comparative analysis of single- and multiple-frequency thermal wave radar imaging inspection of glass fiber reinforced polymer (GFRP)

作者：Liu, Lishuai[1,2];Mandelis, Andreas[2,3];Melnikov, Alexander[2,3];Wang, Liming[4]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety MOE, Shanghai 200237, Peoples R China;[2]Univ Toronto, Ctr Adv Diffus Wave & Photoacoust Technol CADIPT, Dept Mech & Ind Engn, Toronto, ON M5S 3G8, Canada;[3]Inst Adv Nondestruct & Noninvas Diagnost Technol, Toronto, ON M5S 3G8, Canada;[4]Tsinghua Univ, Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China

年份：2022

卷号：4

期号：2

外文期刊名：INTERNATIONAL JOURNAL OF EXTREME MANUFACTURING

收录：;EI(收录号：20221211829024);WOS:【SCI-EXPANDED(收录号:WOS:000765543000001)】；

基金：This work was supported by the National Natural Science Foundation of China under Grant No. 12104155. AM gratefully acknowledges the Canada Research Chairs program, the Natural Sciences and Engineering Research Council of Canada (NSERC) for its support through and a Discovery Grant, and the Canada Foundation for Innovation and the Ontario Research Fund for a John Evans Leaders Fund (CFI-JELF) award. He also acknowledges the oNDuTy Create program funded by NSERC.

语种：英文

外文关键词：GFRP; thermal wave radar; testing parameters; nondestructive testing

摘要：Active infrared thermography has gained increasing popularity for nondestructive testing and evaluation in various industrial fields, especially for composite structures. In this regard, thermal wave radar (TWR) imaging is recognized as the next-generation active thermography technology to obtain great resolution and depth range over the inspected objects. A critical aspect concerns the optimal test parameter selection to guarantee reliable quality assurance required for industrial products. In this work, single- and multiple-frequency TWR was investigated in a quantitative manner with the goal of optimizing the detection parameters in terms of probing range and lateral and depth resolution. The effects of test parameters, including sampling frequency, modulation frequency, chirp duration, chirp bandwidth, etc, were investigated in detail through experiments on a glass fiber reinforced polymer specimen with multi-scale diameter-to-depth ratio defects. This paper aims to help yield a better understanding of the physical mechanism behind TWR and propose a workable scheme for testing parameter selection in practical applications.