Full-field measurement of dynamic stress by mechanoluminescence sensing film

Chenshu Li; Chao-Nan Xu; Yusuke Imai; Nan Bu

doi:10.1117/12.845577

20 October 2009 Full-field measurement of dynamic stress by mechanoluminescence sensing film

Chenshu Li, Chao-Nan Xu, Yusuke Imai, Nan Bu

Proceedings Volume 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering; 749335 (2009) https://doi.org/10.1117/12.845577
Event: Second International Conference on Smart Materials and Nanotechnology in Engineering, 2009, Weihai, China

Abstract

Full-field measurement of dynamic stress has been realized by coating the surface of the test object metal with a upgrade mechanoluminescence sensing film of SrAl₂O₄:Eu (SAOE). Mechanoluminescent materials are attractive smart materials that can emit light induced by mechanical deformation. The ML sensing film of SAOE has been developed to make possible to visualize dynamic stress. Consequently this visualization technique has been become a promising experimental technique to investigate full-field stress analysis. In this paper we report the applications of the SAO ML sensing film for full-field stress analysis in aluminum alloy 5052 samples. Using the SAOE ML sensing film, the stress concentration produced by a circular hole was observed with the naked eyes in real time and the two-dimensional stress distribution was quantitatively measured; the complex and dynamic Portevin-Le Chatelier (PLC) effect, known as instability during plastic deformation, has been visualized, and the propagating characteristics of PLC bands were precisely investigated.

Citation Download Citation

Chenshu Li, Chao-Nan Xu, Yusuke Imai, and Nan Bu "Full-field measurement of dynamic stress by mechanoluminescence sensing film", Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 749335 (20 October 2009); https://doi.org/10.1117/12.845577

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