Table 2.
The curve fitting coefficients for aluminium and wood materials.
| coefficients | p1 | q1 | q2 | q3 |
|---|---|---|---|---|
| aluminium | 52.94 | −5.179 | 13.72 | −10.05 |
| wood | 49.99 | −7.313 | 22.11 | −16.99 |
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