EXTREME shearography: development of a high-speed shearography instrument for measurements of the surface strain components during an impact event

Andrei G. Anisimov; Roger M. Groves

doi:10.1117/12.2318692

7 September 2018 EXTREME shearography: development of a high-speed shearography instrument for measurements of the surface strain components during an impact event

Andrei G. Anisimov, Roger M. Groves

Author Affiliations +

Proceedings Volume 10834, Speckle 2018: VII International Conference on Speckle Metrology; 108340X (2018) https://doi.org/10.1117/12.2318692
Event: SPECKLE 2018: VII International Conference on Speckle Metrology, 2018, Janów Podlaski, Poland

Abstract

This work presents the design and preliminary results of a high-speed shearography instrument in development for surface strain components measurements during an impact event. Composite materials are vulnerable to extreme dynamic loadings such as blade off events or foreign object damage as their mechanical properties are strain rate dependent. The development of new instruments to reconstruct extreme dynamic events will provide important insight into the understanding of the behaviour of composites. Shearography provides a quantitative measurement of the surface strain components with a high sensitivity as it is a non-contact interferometric technique. The current configuration of the shearography instrument realises measurements of the out-of-plane surface strain components during an impact using a double frame approach. The first experimental results reveal phase maps registered during an impact event with μs temporal resolution. Later the experimentally measured surface strain components will be used as input and validation data for new numerical and analytical models of the impact response of composites. The overall set of technical parameters of the developing shearography instrument makes it one of the most extreme applications of shearography for material characterisation.

Citation Download Citation

Andrei G. Anisimov and Roger M. Groves "EXTREME shearography: development of a high-speed shearography instrument for measurements of the surface strain components during an impact event", Proc. SPIE 10834, Speckle 2018: VII International Conference on Speckle Metrology, 108340X (7 September 2018); https://doi.org/10.1117/12.2318692

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