Issue 37

V. Shlyannikov et alii, Frattura ed Integrità Strutturale, 37 (2016) 193-199; DOI: 10.3221/IGF-ESIS.37.25 195 Figure 2: Equivalent stress distribution for turbine disk. Figure 3: Coordinate systems at slot fillet. From Fig.4, it was observed that the peak stresses mainly occur on the surface of the slot fillets of key (web and disc bore). In order to compare the parameter distributions along slot fillet on the free surface of the disk as well as along the disc hub in the thickness direction (Fig.4) is convenient to introduce the dimensionless coordinates in the following form:   d l l 2  , ts b  where l and s are current coordinates, t is hub thickness equal 180 mm, d is slot depth equal 15 mm. In such representation of numerical results, we will use variables and changing in the range from 0 to 1. It should be noted, as it follows from Fig.4, that the stresses on the free surface and in the slot along hub thickness are higher than the yield stress of Steel 34ХН3МА. 0.0 0.2 0.4 0.6 0.8 1.0 -0.3 0.0 0.3 0.6 0.9 1.2 =0, P=50MPa 0.0 0.2 0.4 0.6 0.8 1.0 0.4 0.6 0.8 1.0 1.2 =0.6, P=50MPa r=0 r=0.7mm r=1.6mm r=3mm Figure 4: Hoop stress distributions along fillet and hub.