Page 280 - Biaxial Multiaxial Fatigue and Fracture

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Appendix: NOMENCLATURE

Geometrical parameter defined as the square root of the area of a defect or a crack
projected onto the plane normal to the maximum tensile stress
of the largest defect
Constant in Eq.(4), which is dependent on defect position but independent of
material and defect size
Representative crack length
Specimen diameter
Hole diameter
Correction factors of stress intensity factor (SIF), see Fig. 3
Hole depth
Vickers hardness
Ratio of correction factors of SIF, FI$FIA
SIF in mode I
Maximum value of Kl at the front of a three-dimensional crack
Bending moment amplitude
Torsional moment amplitude
Axial load amplitude
Stress ratio
Standard inspection area
Thickness of standard inspection domain
Return period, VW,,
Control volume
Standard inspection volume, t SO
Threshold SIF range
Mth under biaxial loading
under uniaxial loading
Material constant as a fimction of HV
Ratio of torsional to uniaxial fatigue limit, r,Jaw, of defect-containing specimens
Normal stress amplitude
Remote applied stress
Maximum principal stress amplitude at fatigue limit under combined loading
Minimum principal stress amplitude at fatigue limit under combined loading
oat fatigue limit of defect-containing specimens under combined loading
u at fatigue limit of smooth specimens under combined loading
oat uniaxial fatigue limit of defect-containing specimens
oat uniaxial fatigue limit of smooth specimens
Lower bound of scatter band for a,
Remote applied stresses in x-y coordinate system, see Fig. 3
Shear stress amplitude
rat fatigue limit of defect-containing specimens under combined loading
rat fatigue limit of smooth specimens under combined loading
rat torsional fatigue limit of defect-containing specimens
rat torsional fatigue limit of smooth specimens