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Images of the tested specimens, captured after the impact tests with Hopkinson bar (pressure in bar and pattern of deformation).
| Aluminum Plate | Aluminum Plate + PU | Aluminum Plate + PU-NC2 | Experimental Set-Up—Hopkinson bar | |
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| Aluminum Plate + PU-NC3 | Aluminum Plate + PU-NC4 | |||
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| Aluminum Plate + PU-NC1 | Aluminum Plate + PU-NC2 | Aluminum Plate + PU-NC3 | Aluminum Plate + PU-NC4 | |
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