Dynamic Visualization of Stress Distribution by Mechanoluminescence Image
Dynamic visualization of stress distribution even due to a small deformation has been realized by coating the surface of the test object of metal with a upgrade mechanoluminescence (ML) material of SrAl2O4:Eu (SAO). In this paper we report the application of this ML sensing technique to stress concentration analysis on an aluminium plate. And the comparison with a theoretical calculation demonstrated that the ML intensity of SAO sensing film correlates linearly with von Mises stress on metal surface and the observed real-time ML images quantitatively reflect stress concentration.
Kazumi Kato, Tadashi Takenaka, Masasuke Takata and Kazuo Shinozaki
C. S. Li et al., "Dynamic Visualization of Stress Distribution by Mechanoluminescence Image", Key Engineering Materials, Vol. 388, pp. 265-268, 2009