Advanced speckle methods with high-speed imaging for impact testing of composites
Mikhail Levchenko (IPHS-Bulgarian Academy of Sciences)
Elena Stoykova (IPHS-Bulgarian Academy of Sciences)
Andrei Anisimov (TU Delft - Group Anisimov)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
This study presents the implementation of two speckle-based optical measurement techniques-digital image correlation (DIC) and intensity-based dynamic speckle imaging (DSI)-integrated with high-speed camera acquisition for the dynamic characterization of composite materials under impact loading. The DIC method, relying on the correlation of printed or painted speckle patterns recorded before and after deformation, enables precise quantification of displacement fields. In parallel, the DSI approach captures temporal variations in speckle intensity, improving the detection of subsurface defects and the visualization of velocity distribution associated with internal processes. Our results demonstrate that DSI serves as a valuable complementary tool to the DIC technique.