I am doing ENF test and I am interested in tracking the crack propagation in the adhesive layer between two beams. No matter how hard I try, I cannot see any trace of the crack tip or the crack itself in the adhesive layer. ( I use a relatively high resolution camera and the main reason I am not able to see the crack is because the translucent epoxy adhesive looks dark in the black&white camera).
I was wondering what are the best tricks you use to monitor the track propagation (using a light source behind the specimen? spraying paint? etc) and also, how do you measure it (using a printable ruler, using image analysis software, etc)
Your help and suggestions will be very much appreciated.
Try to use the following program for image analysis:
https://imagej.net/Welcome
using painting of edge and attached ruler and light setting like attached pictures
Thank you so much gentlemen, for your answers. I apologize for replying so late.
Ahmad S.M. Al-Azzawi and Lukasz Sadowski
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