Investigation on RGB laser source applied to dynamic photoelastic experiment

Songgang Li; Guobiao Yang; Weiming Zeng

doi:10.1117/12.2054275

2 June 2014 Investigation on RGB laser source applied to dynamic photoelastic experiment

Songgang Li, Guobiao Yang, Weiming Zeng

Proceedings Volume 9234, International Conference on Experimental Mechanics 2013 and Twelfth Asian Conference on Experimental Mechanics; 92340L (2014) https://doi.org/10.1117/12.2054275
Event: International Conference on Experimental Mechanics 2013 and the Twelfth Asian Conference on Experimental Mechanics, 2013, Bangkok, Thailand

Abstract

When the elastomer sustains the shock load or the blast load, its internal stress state of every point will change rapidly over time. Dynamic photoelasticity method is an experimental stress analysis method, which researches the dynamic stress and the stress wave propagation. Light source is one of very important device in dynamic photoelastic experiment system, and the RGB laser light source applied in dynamic photoelastic experiment system is innovative and evolutive to the system. RGB laser is synthesized by red laser, green laser and blue laser, either as a single wavelength laser light source, also as synthesized white laser light source. RGB laser as a light source for dynamic photoelastic experiment system, the colored isochromatic can be captured in dynamic photoelastic experiment, and even the black zero-level stripe can be collected, and the isoclinics can also be collected, which conducively analysis and study of transient stress and stress wave propagation. RGB laser is highly stable and continuous output, and its power can be adjusted. The three wavelengths laser can be synthesized by different power ratio. RGB laser light source used in dynamic photoelastic experiment has overcome a number of deficiencies and shortcomings of other light sources, and simplifies dynamic photoelastic experiment, which has achieved good results.

Citation Download Citation

Songgang Li, Guobiao Yang, and Weiming Zeng "Investigation on RGB laser source applied to dynamic photoelastic experiment", Proc. SPIE 9234, International Conference on Experimental Mechanics 2013 and Twelfth Asian Conference on Experimental Mechanics, 92340L (2 June 2014); https://doi.org/10.1117/12.2054275

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KEYWORDS

Photoelasticity

RGB color model

Light sources

Dynamical systems

Wave propagation

High speed photography

Fringe analysis

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