Affiliations: Interdisciplinary Graduate School of Engineering
Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580,
Japan | National Institute of Advanced Industrial Science and
Technology (AIST), Kyushu, 807-1 Shuku, Tosu, Saga 841-0052, Japan. E-mail:
cn-xu@aist.go.jp | CREST, Japan Science and Technology Agency (JST),
Honcho 4, Kawaguchi, Saitama 332-0012, Japan
Abstract: We have successfully demonstrated that the stress distribution of a
metal material can be directly displayed by coating the surface of test objects
with an upgraded strong mechanoluminescence (ML) material of SrAl2O4:Eu (SAO).
In this paper an aluminum plate with the SAO sensing film was applied to
experimental analysis of stress concentrations. And the comparison with a
numerical analysis showed that the ML intensity of SAO sensing film correlates
linearly with stress on metal surface and the observed real-time ML images
quantitatively reflect stress concentration. This novel visualisation technique
can be applied to view stress concentration in various fields such as
modelling, manufacturing and demonstration of industrial products as well as to
point out danger areas in structural objects such as pipelines and bridges.
Keywords: Visualization, Mechanoluminescence, Stress distribution
