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| Type | S′-0 | S′-45 | S′-90 | D′-0 | D′-45 | D′-90 |
|---|---|---|---|---|---|---|
| Estimated E (GPa) | 25.5 | 8.78 | 7.18 | 23.88 | 8.78 | 8.8 |
|
| ||||||
| Test #1 | 25.8 | 8.5 | 7.32 | 21.63 | 8.05 | 8.66 |
| Error (%) | 1.16 | 3.28 | 1.90 | 9.43 | 8.40 | 1.56 |
| Test #2 | 27.16 | 8.70 | 6.81 | 25.53 | 8.39 | 9.06 |
| Error (%) | 6.5 | 0.92 | 5.15 | 6.91 | 4.52 | 3.02 |
| Test #3 | 25.62 | 8.87 | 6.98 | 25.32 | 8.92 | 8.94 |
| Error (%) | 0.49 | 0.93 | 2.81 | 6.04 | 1.58 | 1.62 |
| Mean | 26.19 | 8.69 | 7.04 | 24.16 | 8.45 | 8.89 |
| STD | 0.84 | 0.19 | 0.26 | 2.19 | 0.44 | 0.21 |
|
| ||||||
| Average error (%) | 2.72 | 1.03 | 2.00 | 1.17 | 3.72 | 0.98 |
