High-speed moire photography for studying dynamic properties in carbon fiber composites

L. Gunnar Melin

doi:10.1117/1.601865

1 February 1998 High-speed moire photography for studying dynamic properties in carbon fiber composites

L. Gunnar Melin

Optical Engineering, Vol. 37, Issue 2, (February 1998). https://doi.org/10.1117/1.601865

A moire method for dynamic in-plane displacement measurement is used with the purpose of studying carbon fiber/epoxy composite specimens under tensile dynamic load. The displacement field is measured with a random noise level of less than 0.3 ?m and by using a high-speed camera, a framing speed of 1 million frames/s is achieved. Cracks propagating at speeds of 2000 m/s have been observed. To evaluate strain accurately from the displacement fields, a calibration for distortion in the high-speed image converter camera must be made. A method to measure the variable magnifications in the different frame areas of the camera back is described.

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L. Gunnar Melin "High-speed moire photography for studying dynamic properties in carbon fiber composites," Optical Engineering 37(2), (1 February 1998). https://doi.org/10.1117/1.601865

Published: 1 February 1998

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