Simultaneous density and thermal conductivity depth profile reconstructions from noised thermal-wave amplitude and phase data using a combined integral-equation and imperialist competitive algorithm method

被引:1
作者
Mandelis, A. [1 ,2 ]
Kooshki, S. [1 ]
Melnikov, A. [1 ,2 ]
机构
[1] Univ Toronto, Ctr Adv Diffus Wave & Photoacoust Technol CADIPT, Dept Mech & Ind Engn, Toronto, ON MS5 3G8, Canada
[2] Univ Toronto, Inst Adv Nondestruct & Noninvas Diagnost Technol I, Toronto, ON M5S 3G8, Canada
基金
加拿大自然科学与工程研究理事会; 加拿大创新基金会;
关键词
IDENTIFICATION; PROFILOMETRY;
D O I
10.1063/5.0129536
中图分类号
O59 [应用物理学];
学科分类号
摘要
An efficient new thermal-wave inverse-problem approach based on an integral-equation boundary-value method coupled with an imperialist competitive algorithm was developed. The methodology was successfully applied to simultaneously reconstruct density and thermal conductivity depth profiles in a sintered powder metallurgy sample from an industrial automotive manufacturer with a surface layer of higher density than the bulk. The density and thermal conductivity depth profiles were validated independently using the manufacturer's data and in-house temperature and porosity measurements. The present non-destructive inverse problem approach represents a generalized formalism to thermal-wave reconstruction of dual depth profiles using frequency scan data measured from the interrogated surface. From a fundamental viewpoint, the method adds significant insights into the relationship between thermal conductivity and density distributions in inhomogeneous solids.
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页数:15
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