Open Access
Table 3
Sample nomenclature.
| Sample | Overall thickness (40 mm) |
|---|---|
| AL40 | Aluminum foam 40 mm |
| PU40 | Polyurethane foam 40 mm |
| AL20PU20 | Al foam 20 mm + Pu foam 20 mm |
| PU20AL20 | Pu foam 20 mm + Al foam 20 mm |
| ALPUALPU | Al 10 mm + Pu foam 10 mm + Al foam 10 mm + Pu foam 10 mm |
| PUALPUAL | Pu foam10 mm + Al foam 10 mm + Pu foam 10 mm + Al foam 10 mm |
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