| Specimen type | Fiber loading content (wt%) | Fiber strength (MPa) | Critical fiber length, lc (mm) | Average fiber length (mm) | Average Fiber orientation coefficient | Composite strength (MPa) | Measured interfacial shear strength, t (MPa) | t’s difference between Kelly-Tyson and nano-indentation (%) |
| DFFIM GF/PET | 16 | 1500 | 0.54 | 0.51 | 0.92 | 88.0 | 25 | −1.2 |
| 28 | 0.58 | 0.39 | 0.93 | 110.3 | 23.3 | −8.0 | ||
| 43.3 | 0.83 | 0.45 | 0.92 | 135.6 | 16.2 | −35.7 | ||
| 55.2 | 0.78 | 0.35 | 0.92 | 150.9 | 17.3 | −31.6 |