Mechanoluminescent Materials: A New Way to Analyze Stress by Light

Proceedings

Smet, Philippe F.¹  Michels, Simon²  Feng, Ang³  Lamberti, Alfredo⁴ 

[1] Author to whom correspondence should be addressed.;Center for Nano- and BioPhotonics (NB-Photonics), Ghent University, 9000 Ghent, Belgium;LumiLab, Department of Solid State Sciences, Ghent University, Krijgslaan 281-S1, 9000 Ghent, Belgium;Mechanics of Materials and Structures (MMS), Department of Materials, Textiles and Chemical Engineering (MaTCh), Ghent University, Campus A 903, 9052 Zwijnaarde, Belgium

关键词: mechanoluminescence;    anorthite;    stress visualization;    acoustically induced piezoluminescence;    Von Mises stress;   

DOI  :  10.3390/ICEM18-05422

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

The monitoring of stress changes in structural components under various kinds of dynamical loading is crucial for the assessment of their integrity and lifetime. In addition to many methodologies available, such as strain gauges, optical fiber sensors, X-Ray diffraction and digital image correlation, we introduce a novel non-contact method to visualize stress distributions based on mechanoluminescence (ML). ML is a phenomenon occurring in some materials that emit light upon an applied stress level. In this paper, we develop the ML material (Ca0.4Sr0.6)Al2Si2O8:1%Eu2+,1%Ho3+, a glow-in-the-dark material, to visualize stress distribution in a disc, as well as the stress field of an ultrasonic transducer. The properties of defects in the ML phosphors, which are responsible for ML in this material, are vital for stress visualization.

【 授权许可】

CC BY