Issue 16

L. Susmel, Frattura ed Integrità Strutturale, 16 (2011) 5-17; DOI: 10.3221/IGF-ESIS.16.01

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%.

 An

 An

Material

Ref.

Type of notched specimen

[MPa]

[MPa]

0.4% C Steel (Normalized)

[1] [1] [1] [1] [1] [1] [1]

179.1 209.9 302.6 216.1 268.6 247.0 271.7 450.9 223.4 424.7 423.4 423.4 271.7 288.7 300.7 297.8 471.3 448.1 312.5 259.3 347.3 563.5 174.3 188.6 117.8 311.8 142.3 204.7 268.1 631.0 373.0 96.1 66.9 95.3

176.0 151.3 183.7 160.6 236.2 182.2 240.8 162.1 305.5 300.3 288.4 240.8 211.5 235.4 220.9 354.9 225.5 180.6 270.1 185.2 120.7 155.3 156.6 220.4 122.7 156.4 157.8 211.3 243.9 539.0 334.0

V-notched cylindrical bar V-notched cylindrical bar V-notched cylindrical bar V-notched cylindrical bar V-notched cylindrical bar V-notched cylindrical bar V-notched cylindrical bar

3% Ni steel

3/3.5% Ni steel

Cr-Va steel

3.5% NiCr steel (n. impact) 3.5% NiCr steel (l. impact) NiCrMo steel (75-80 tons)

CrMo steel CrMo steel CrMo steel CrMo steel CrMo steel

[32] [32] [32] [32] [32] [32] [32] [32] [32] [32] [32] [32] [30] [30] [30] [69] [69] [70] [71] [51] [72] [72] [19] [19] [19] [60] [60]

295.5 Cylindrical hollow sample with oil hole Cylindrical hollow sample with oil hole Cylindrical hollow sample with oil hole Cylindrical hollow sample with oil hole Cylindrical hollow sample with oil hole Cylindrical hollow sample with oil hole Cylindrical hollow sample with oil hole Cylindrical hollow sample with oil hole Cylindrical hollow sample with oil hole Cylindrical hollow sample with oil hole Cylindrical hollow sample with oil hole V-notched cylindrical bar 354.6 Cylindrical hollow sample with oil hole

NiCrMoVa steel NiCrMoVa steel

CrMoVa steel DTD551 CrMoVa steel DTD551 CrMoVa steel DTD551 CrMoVa steel DTD551

NiCr steel S65A steel S65A steel S65A steel

Cylindrical shaft with fillet

Hollow specimens with 6 deep splines

16MnR 16MnR

V-notched cylindrical bar V-notched cylindrical bar Cylindrical shaft with fillet Cylindrical shaft with fillet V-notched cylindrical bar V-notched cylindrical bar V-notched cylindrical bar V-notched cylindrical bar V-notched cylindrical bar V-notched cylindrical bar V-notched cylindrical bar

SAE 1045

C40

152.8 V-notched cylindrical bar

CK45

Low Carbon Steel Low Carbon Steel

En3B* En3B* En3B*

SAE 52100 SAE 52100

*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.

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