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Evaluation of Dang Van stress in Hertzian rolling contact
Author(s) -
SANDSTRÖM J.
Publication year - 2012
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.2012.01696.x
Subject(s) - contact mechanics , stress space , stress (linguistics) , shear stress , space (punctuation) , materials science , mechanics , structural engineering , mathematics , engineering , physics , computer science , finite element method , constitutive equation , linguistics , philosophy , operating system
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 wheel–rail contacts.