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Main values of maximum stress in (MPa).
| Sample | Before Aging | After Aging | ||||
|---|---|---|---|---|---|---|
| PD | MD | 45 | PD | MD | 45 | |
| Epoxy resin | 223.6 ± 6.7 | 277.7 ± 4.6 | 116.9 ± 8.9 | 223.8 ± 14.2 | 284.9 ± 4.7 | 114.9 ± 4.0 |
| Epoxy resin/naringenin 2 phr | 212.9 ± 8.5 | 277.9 ± 7.6 | 79.5 ± 16.8 | 219.9 ± 8.6 | 258.1 ± 18.8 | 80.3 ± 11.2 |
| Epoxy resin/naringenin 4 phr | 171.1 ± 8.9 | 311.4 ± 4.8 | 69.2 ± 4.1 | 167.8 ± 3.4 | 313.6 ± 3.7 | 85.6 ± 4.5 |
| Epoxy resin/naringenin 8 phr | 176.06 ± 6.9 | 239.5 ± 3.4 | 98.8 ± 12.7 | 171.8 ± 11.4 | 274.8 ± 1.3 | 101.0 ± 9.3 |
