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Evaluation of Dang Van stress in Hertzian rolling contact

Johan Sandström (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik)
Fatigue & Fracture of Engineering Materials & Structures (8756-758X). Vol. 35 (2012), 12, p. 1088-1094.
[Artikel, refereegranskad vetenskaplig]

The equivalent Dang Van stress under Hertzian contacts is evaluated over the subsurface space using four computational approaches. The accuracy and computational efficiency of the different models is assessed. It is found that an approach consisting in finding the minimum circumscribed hypersphere to the deviatoric stress path in time gives a good trade-off between accuracy and efficiency. It is also shown that a very computationally cheap approximation employing half the peak Tresca shear stress results in good agreements in the entire subsurface space for conditions relevant under wheelrail contacts.

Nyckelord: contact mechanics, 3-D analysis, Dang Van criterion, multiaxial computing methods, multiaxial stress, rolling contact fatigue (RCF)



Denna post skapades 2013-01-21. Senast ändrad 2015-02-24.
CPL Pubid: 171838

 

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Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Material- och beräkningsmekanik

Ämnesområden

Maskinteknik

Chalmers infrastruktur