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R. Citarella et alii, Frattura ed Integrità Strutturale, 34 (2015) 554-563; DOI: 10.3221/IGF-ESIS.34.61 561 Figure 10 : Mean values for the shaft-hub press fit force upon varying the design parameters. Control factors (matrix L 4 ) Noise factors (matrix L 4 ) Average press fit force (N) S/N ratio (  =20Log 10 (  ) ) f e shaft tolerance grade i1 i1 i2 i2 f1 f2 f1 f2 t1 t2 t2 t1 0.2 2.1 n6 1419 1240 589 515 941 6.29E+00 0.2 3 p6 2215 1935 1484 1297 1733 1.23E+01 0.1 2.1 p6 1118 976 753 657 876 1.24E+01 0.1 3 n6 642 561 281 246 432 6.76E+00 Table 1 : Average press fit force for an isothermal joint for each of the 16 tested configurations. Control factors (matrix L 4 ) Noise factors (matrix L 4 ) Average equivalent stress value  eq (N/mm 2 ) S/N ratio (  =20Log 10 (  ) ) f e shaft tolerance grade i1 i1 i2 i2 f1 f2 f1 f2 t1 t2 t2 t1 0.2 2.05 n6 334 321 315 388 340 20.17 0.2 3 p6 552 543 417 477 497 17.93 0.1 2.05 p6 610 580 467 534 548 18.89 0.1 3 n6 550 500 405 480 484 18.10 Table 2 : Von Mises stress peaks for each of the 16 tested configurations and relative sensitivity to noises.