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Railway axle design – to be based on fatigue initiation or crack propagation?

Roger Lundén (Institutionen för tillämpad mekanik, Dynamik) ; Tore Vernersson (Institutionen för tillämpad mekanik, Dynamik) ; Anders Ekberg (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik)
Proceedings of the 9th International Heavy Haul Conference p. 509-517. (2009)
[Konferensbidrag, refereegranskat]

A numerical study is presented where the impact of simultaneous thermal and mechanical loading on a railway wheel tread as imposed by braking and rolling contact is reported. A comparison is made of 2D and 3D finite element simulations of the thermomechanical problem featuring a material model that accounts for thermal expansion and plastic deformations. It is found that 2D simulations give unrealistic predictions of plastic deformations. The 3D simulations demonstrate a significant influence of the thermal loading on the induced tensile stresses also in cases of rather moderate temperature increases.

Nyckelord: railway wheel tread damage, thermomechanical analysis, rolling contact fatigue

Denna post skapades 2010-01-14. Senast ändrad 2014-09-17.
CPL Pubid: 107350