Influence of short thermal cracks on the material behaviour of a railway wheel subjected to repeated rolling
Artikel i vetenskaplig tidskrift, 2014

An analysis of whether and how the occurrence of shallow (radial) thermal cracks promotes additional plastic deformation of a mechanically loaded wheel tread is carried out. The study employs numerical simulations of a 2D slice of an elastoplastic railway wheel tread containing thermal (radial) cracks. The cracked wheel material is subjected to repeated passes of a frictional rolling contact load. The effect of the existing thermal cracks on bulk deformation and subsequent rolling contact promoted growth is quantified. Results indicate that thermal cracks of a depth of 0.1 mm have a negligible effect, whereas 1.0 mm cracks significantly decrease the bulk resistance of the wheel material. Further, it is shown how the magnitude of stress, strain and deformation depends on the direction of applied traction.

thermal cracking

rolling contact fatigue

Författare

Sara Caprioli

Dynamik

Anders Ekberg

Dynamik

Advanced Materials Research

1022-6680 (ISSN) 1662-8985 (eISSN)

Vol. 891-892 1139-1145

Drivkrafter

Hållbar utveckling

Innovation och entreprenörskap

Ämneskategorier

Tribologi

Teknisk mekanik

Farkostteknik

Styrkeområden

Transport

Materialvetenskap

Mer information

Skapat

2017-10-08