Full-field stress measuring method based on terahertz time-domain spectroscopy

Terahertz wave has been used to obtain the internal information of materials due to its penetrability to optically opaque materials. In this paper, we propose a full-field stress measuring method using terahertz time-domain spectroscopy. The theoretical model of the method was established based on t...

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Bibliographic Details
Published inOptics express Vol. 29; no. 24; p. 40205
Main Authors Kang, Kai, Du, Yufeng, Wang, Shibin, Li, Lin an, Wang, Zhiyong, Li, Chuanwei
Format Journal Article
LanguageEnglish
Published 22.11.2021
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ISSN1094-4087
1094-4087
DOI10.1364/OE.435386

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Summary:Terahertz wave has been used to obtain the internal information of materials due to its penetrability to optically opaque materials. In this paper, we propose a full-field stress measuring method using terahertz time-domain spectroscopy. The theoretical model of the method was established based on the stress-optical law, and the method was then validated experimentally. A four-point bending experiment was conducted to determine the stress-optical coefficient of the specimen material, after which the proposed method was used to measure the stress distribution of a diametrically loaded disk. The experimental results present a reasonable agreement with the theoretical solution.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.435386