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Wheels - Determination of residual stresses and of their distribution in the rims of monobloc wheels against UIC Leaflet 510-5
NORMA vydaná dňa 1.2.2007
Označenie normy: UIC B169/RP22-1ed.
Dátum vydania normy: 1.2.2007
Kód tovaru: NS-1190371
Počet strán: 94
Približná hmotnosť: 313 g (0.69 libier)
Krajina: Medzinárodná technická norma
Kategória: Technické normy UIC
During work conducted by the ERRI Committee of Experts B 169 to determine the cracking threshold of block-braked monobloc wheels, three features influencing the radial cracking of the wheels were pinpointed: residual stresses in the wheel rim, thermal cracks and the toughness of the material. The work focused on standard ORE wheels and similar wheel types.
Using iso-stress curves, it was possible to determine the distribution of residual stresses in the wheel rim and in particular their development in the direction of propagation of a crack. Ultrasound measurements enabled the maximum value of residual stresses to be determined in a range of 300 - 400 MPa. However, this upper limit only applies to standard ORE wheels and other similar wheel types.
The average residual stresses occurring in the wheel rims of monobloc wheels dimensioned against UIC Leaflet 510-5 are known, though their distribution is not. These wheels supposed higher safety levels against thermal stresses (compared to current monobloc wheels) cannot therefore currently be gauged. In order to enable definitive conclusions to be drawn from a safety point of view, it is vital that the distribution of residual stresses for these new wheel types be known.
This study has achieved its initial goal, which was to determine the distribution of residual stresses in the rims of wheels certified against UIC Leaflet 510-5:
Räder Bestimmung der Eigenspannung und deren Verteilung im Radkranz von vollrädern entsprechend UIC MB 5105|"+
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