Table 3. Impact Resistance of Covering Materials that Protect Covered Materials from Being Damaged, as Estimated by Drop Weight Impact Tests.
| sample | EI,max,protecta (J) | hb (cm) |
|---|---|---|
| neat SIS | 4.90 | 20.0 |
| CB-filled NR | 12.8 | 50.0 |
| i-SIS(Na) | 15.3 | 60.0 |
| GFRP | 17.8 | 70.0 |
| i-SIS(Ba) | 21.6 | 85.0 |
a
Maximum impact energy that can be applied such that irreversible impact damage occurs only to the specimen and not to the GFRP support plate. The tests were performed using a rodlike striker with a 16 mm rounded head (mass 2.709 kg) at 23 °C and 50% RH.
b
Maximum height position of the striker for a drop weight impact test such that irreversible impact damage occurs only to the specimen and not to the GFRP support plate.