Issue 16

L. Susmel, Frattura ed Integrità Strutturale, 16 (2011) 5-17; DOI : 10.3221/IGF-ESIS.16.01 13 The accuracy of the MWCM when applied in terms of nominal stresses in estimating high-cycle fatigue strength of notched components is summarised in the  An vs.  A,eq diagram reported in Fig. 5: the above chart makes it evident that the systematic use of our criterion resulted in 92% of the predictions falling within an error interval equal to ±15%. Material Ref.  An  An Type of notched specimen [MPa] [MPa] 0.4% C Steel (Normalized) [1] 179.1 176.0 V-notched cylindrical bar 3% Ni steel [1] 209.9 151.3 V-notched cylindrical bar 3/3.5% Ni steel [1] 302.6 183.7 V-notched cylindrical bar Cr-Va steel [1] 216.1 160.6 V-notched cylindrical bar 3.5% NiCr steel (n. impact) [1] 268.6 236.2 V-notched cylindrical bar 3.5% NiCr steel (l. impact) [1] 247.0 182.2 V-notched cylindrical bar NiCrMo steel (75-80 tons) [1] 271.7 240.8 V-notched cylindrical bar CrMo steel [32] 450.9 295.5 Cylindrical hollow sample with oil hole CrMo steel [32] 223.4 162.1 Cylindrical hollow sample with oil hole CrMo steel [32] 424.7 305.5 Cylindrical hollow sample with oil hole CrMo steel [32] 423.4 300.3 Cylindrical hollow sample with oil hole CrMo steel [32] 423.4 288.4 Cylindrical hollow sample with oil hole NiCrMoVa steel [32] 271.7 240.8 V-notched cylindrical bar NiCrMoVa steel [32] 288.7 211.5 Cylindrical hollow sample with oil hole CrMoVa steel DTD551 [32] 300.7 235.4 Cylindrical hollow sample with oil hole CrMoVa steel DTD551 [32] 297.8 220.9 Cylindrical hollow sample with oil hole CrMoVa steel DTD551 [32] 471.3 354.6 Cylindrical hollow sample with oil hole CrMoVa steel DTD551 [32] 448.1 354.9 Cylindrical hollow sample with oil hole NiCr steel [32] 312.5 225.5 Cylindrical hollow sample with oil hole S65A steel [30] 259.3 180.6 Cylindrical hollow sample with oil hole S65A steel [30] 347.3 270.1 Cylindrical shaft with fillet S65A steel [30] 563.5 185.2 Hollow specimens with 6 deep splines 16MnR [69] 96.1 120.7 V-notched cylindrical bar 16MnR [69] 174.3 155.3 V-notched cylindrical bar SAE 1045 [70] 188.6 156.6 Cylindrical shaft with fillet C40 [71] 117.8 152.8 V-notched cylindrical bar CK45 [51] 311.8 220.4 Cylindrical shaft with fillet Low Carbon Steel [72] 66.9 122.7 V-notched cylindrical bar Low Carbon Steel [72] 95.3 156.4 V-notched cylindrical bar En3B* [19] 142.3 157.8 V-notched cylindrical bar En3B* [19] 204.7 211.3 V-notched cylindrical bar En3B* [19] 268.1 243.9 V-notched cylindrical bar SAE 52100 [60] 631.0 539.0 V-notched cylindrical bar SAE 52100 [60] 373.0 334.0 V-notched cylindrical bar *Fully-reversed uniaxial and torsional endurance limits estimated according to Peterson. Table 3 : Fully-reversed uniaxial and torsional endurance limits for the investigated notched samples.