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Table 1

Identification of the mean value, standard deviation (std) and dispersion of parameters δ 0 and k for the four loading cases ranging from 300 to 800 N.

Load F max (N) 300 400 600 800
Mean of δ 0 (mm) 0.105 0.117 0.207 0.218
Std of δ 0 (mm) 0.056 0.054 0.083 0.040
Dispersion of δ 0 54% 46% 40% 20%
Mean of k (mm/cycle) 9.29 × 10−6 9.87 × 10−6 15.0 × 10−6 15.5 × 10−6
Std of k (mm/cycle) 6.32 × 10−6 9.64 × 10−6 14.3 × 10−6 7.95 × 10−6
Dispersion of k 68% 98% 95% 51%

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