Experimental Demonstration of In-Situ Damage Detection in Fiber Reinforced Composites

Quasi-Static Loading Test on Di-AC embedded 3-Ply GFRP
with Delamination

– Strain rate: 0.0032 mm/sec
– Epoxy Resin: Hardener (100:27)
– 5 wt% Dimeric Anthracene (Di-AC, mechanophore)
– Dimension: 55mm(L) x 20mm(W) x 0.9mm (T)
– Field of View: 22mm x 22mm
– Induced delamination using Teflon
– Notch of length ≈1mm at the left edge of the specimen

• Images of Specimen

• Schematic of Specimen

• Intensity in the region of the inserted Teflon increases significantly after 0.4% strain
• Intensity increases globally after 1.6% strain
• Noticeable increment in intensity around the edge of the Teflon is observed after 2% strain