Fatigue cracking of bearing and failure of railway axles - Integrity of ...

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Structure assessment of inner ring Critical crack length regarding to ovelaping PRESEŽEK δ=0,037 δ=0,05 δ=0,052 δ=0,055 δ=0,06 δ=0,074 δ=0,1 δ=0,15 ac (mm) - - 15 14,6 14,3 12,5 9 5,5
1 Press stress has not effect to crack. Dangerous for failure. Discussion Press stress causes crack propagation 0,000 0,030 0,060 0,090 0,120 0,150 0,037 0,052 Safe service Appropriate overlaping! Fail of inner ring. 0,037 0,074 Reality? Overlap (mm) Prescribed by SŽ
Page 1 and 2: N. Gubeljak 1 , U. Očko 2 , J. Pre
Page 3 and 4: Motivation Case 1: The wagon’s be
Page 5 and 6: MOTIVATION Case 2 (a few months lat
Page 7 and 8: Motivation Pitting of inner ring of
Page 9 and 10: Motivation Wheel-pair bearing of th
Page 11 and 12: Pleminar Investigation On the wago
Page 13 and 14: Tensile tests
Page 15 and 16: Fracture mechanics toughness testin
Page 21 and 22: Stress distribution through the sec
Page 23 and 24: Stress distribution through the sec
Page 25 and 26: K I (N/mm 1,5 ) 120 118 116 114 112
Page 27 and 28: F Analysis of results Razpoka na no
Page 29 and 30: Application of Fracture mechanics M
Page 31 and 32: Maksimum value of SIF K IIAmax at p
Page 33 and 34: K = π×a×(σ ×f +σ ×f +σ ×f
Page 35 and 36: Limit load: σ σ gζ ( ) ⋅ + g(
Page 37 and 38: Structure assessment of inner ring
Page 39 and 40: Structure assessment of inner ring
Page 41: Structure assessment of inner ring
Page 45 and 46: Conclusion The purpose of the work
Page 47: Thank you for your attention!

Fatigue cracking of bearing and failure of railway axles - Integrity of ...

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