文献类型：期刊文献

英文题名：Investigations for inclination angle characterization of angular defects using eddy current pulsed thermography

作者：Liu, Feng Zhu, Junzhen Tian, Gui Yun Ulianov, Cristian Wang, Zhao

第一作者：Liu, Feng

通信作者：Zhu, JZ[1]

机构：[1]Guizhou Inst Technol, Sch Mech Engn, Guiyang, Guizhou, Peoples R China;[2]Newcastle Univ, Sch Engn, Newcastle Upon Tyne, Tyne & Wear, England;[3]Army Acad Armored Forces, Dept Vehicle Engn, Beijing, Peoples R China;[4]Newcastle Univ, NewRail Ctr Railway Res, Newcastle Upon Tyne, Tyne & Wear, England;[5]Lanzhou Railway Bur, Flaw Detect Workshop, Lanzhouxi Publ Works Sect, Lanzhou, Gansu, Peoples R China

第一机构：贵州理工学院机械工程学院

通信机构：corresponding author), Newcastle Univ, Sch Engn, Newcastle Upon Tyne, Tyne & Wear, England.

年份：2019

卷号：100

起止页码：73-81

外文期刊名：INFRARED PHYSICS & TECHNOLOGY

收录：;EI(收录号：20192206991019);Scopus(收录号：2-s2.0-85066124960);WOS:【SCI-EXPANDED(收录号:WOS:000485855500010)】；

基金：This work is supported by the Engineering and Physical Sciences Research Council under Grant EP/J012343/1, National Natural Science Foundation of China under Grant 61527803, and the Joint Research Fund of Department of Science & Technology of Guizhou Province under Grant LH[2015]7093. Dr. F. Liu would like to thank the China Scholarship Council for sponsoring his one-year visit to Newcastle University, U.K. as an academic visitor.

语种：英文

外文关键词：Angular defects; Rolling contact fatigue cracking; Inclination angle; Eddy current pulsed thermography; Skewness; Kurtosis

摘要：As a typical branch of active thermography techniques, eddy current pulsed thermography (ECPT) has been used to detect surface and subsurface defects in many scenarios. Among different applications, localization and characterization of rolling contact fatigue cracking (a common angular defect) in rail tracks has gained more attentions. This paper investigates three features for the inclination angle characterization of artificial angular defects. Specifically, one pixel-level and two spatial-level features, i.e., max pixel response, skewness- and kurtosis-based spatial features, are proposed to build the relations to the inclination angle. Based on the 3D FEM, the simulation results show that the relation between the max pixel response and the inclination angle is non-monotonic under different heating pulses. In contrast, the skewness- and kurtosis-based spatial features can give overall monotonic relations to the inclination angle under the condition that a longer pocket length (>= 0.38 mm) occurs and a longer heating pulse (>= 100 ms) is used. Further, the above simulation results were experimentally verified.