Fatigue cracking of bearing and failure of railway axles - Integrity of ...
Fatigue cracking of bearing and failure of railway axles - Integrity of ...
Fatigue cracking of bearing and failure of railway axles - Integrity of ...
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Limit load:<br />
σ σ<br />
gζ ( ) ⋅ + g( ζ) ⋅ + (1 −ζ) ⋅σ<br />
max<br />
=<br />
3 9<br />
r<br />
2<br />
(1 −ζ) ⋅Rp<br />
1<br />
σ = ⋅( σ −σ<br />
)<br />
b<br />
1 2<br />
2<br />
1<br />
σ = ⋅ ( σ + σ )<br />
m<br />
1 2<br />
2<br />
3 0.75<br />
( ) 1 20 ( )<br />
a<br />
gζ = − ⋅ζ⋅ l<br />
al ⋅<br />
ζ =<br />
T⋅ ( l+ 2 ⋅T)<br />
σ<br />
σ<br />
R<br />
b<br />
m<br />
p<br />
Estimation <strong>of</strong> Struc. <strong>Integrity</strong><br />
b 2<br />
2<br />
b<br />
2 2<br />
m<br />
[N/mm 2 ] - bending stress<br />
[N/mm 2 ] - membrane stress<br />
[N/mm 2 ] - yield stress<br />
σ 1<br />
f(σ t obr + σt kr )<br />
σ 2<br />
σ 2