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Mode I critical energy release rate, GIC, for the Unbalanced mDCB specimen with hII = 12.7 mm versus the standard specimen, the DCB test.
| Adhesive | GIC mDCB/Nmm−1 | GIC DCB/Nmm−1 | ΔG/% |
|---|---|---|---|
| Brittle | 0.34 ± 0.02 | 0.35 ± 0.08 | −3 |
| Tough | 1.31 ± 0.07 | 1.27 ± 0.05 | +3 |
