| Specimens | Mean inserting force/kN | Peak force/kN | Combined plateau force/kN | MP ratio | Integral displacement/mm | Integral value/J | Absorbing energy levels/J·mm-1 |
|---|---|---|---|---|---|---|---|
| A+A+A | 3.4932 | 12.8682 | 12.6739 | 1.0153 | 14.5 | 97.9561 | 6.7556 |
| A+B+A | 1.2509 | 10.6354 | 10.5231 | 1.0107 | 18.5 | 79.1472 | 4.2782 |
| A+A+B | 1.4573 | 9.3415 | 9.2987 | 1.0046 | 18.5 | 70.7828 | 3.8261 |
| B+B+B | 0.6534 | 3.2721 | 3.2614 | 1.0033 | 28.5 | 61.3045 | 2.1510 |