Experimental Demonstration of In-Situ Damage Detection in Fiber Reinforced Composites
Contents
- Experimental Setup
- Quasi-Static Loading Test 1 on 1-Ply GFRP
- Quasi-Static Loading Test 2 on 1-Ply GFRP
- Fatigue Test on 1-Ply GFRP
- Quasi-Static Loading Test on 3-Ply GFRP
- Quasi-Static Loading Test on 1-Ply CFRP
- Loading Test on 3-Ply GFRP with Delamination
- Comparison between DiAC & Control Sample (3-Ply GFRP) with Delamination
- Quasi-Static Loading Test on 3-Ply CFRP
- Quasi-Static Loading Test on 3-Ply CFRP with Delamination
Fatigue Test on Di-AC embedded GFRP
– Fatigue test with 20Hz
– Displacement control (0.06%-3% strain)
– Epoxy Resin: Hardener (100:27)
– 5 wt% Dimeric Anthracene (Di-AC, mechanophore)
– Dimension: 55mm(L) x 20mm(W) x 0.3mm (T)
– Field of View: 7mm x 7mm
– Notch of length ≈1mm at the left edge of the specimen
- Intensity of fluorescence increases from 10k to 60k cycles
- Intensity drop is observed after 60k cycles due to the sites with through-thickness microcracks resulting in the form of regions with very low intensity
- With subsequent loading cycles, the sample fails with the cracks visualized by the intensity of fluorescence of activated mechanophores in real-time