Premium
Modeling fatigue crack and spalling for rolling die under hot milling
Author(s) -
Tolcha Mesay Alemu,
Altenbach Holm,
Shunki Tibba Getachew
Publication year - 2019
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/ffe.13042
Subject(s) - spall , materials science , finite element method , structural engineering , constitutive equation , fracture (geology) , die (integrated circuit) , fracture mechanics , crack closure , mechanism (biology) , mechanics , metallurgy , composite material , engineering , philosophy , physics , epistemology , nanotechnology
In hot milling process, rolling die is subjected to nonsteady conditions which can rise the combinations of fatigue and spalling damage mechanism. An understanding about the failure mechanism of the rolling die is essential under hot rolling process. Fatigue crack growth and spalling process are governed by highly concentrated strain and stress in the crack tip region. Based on the theory of elastic‐plastic fracture mechanics, an analytical model are presented in this paper to determine the elliptical crack growth rate and spalling damage mechanism. The model includes new proposed constitutive equations for fatigue and spalling crack growth. To verify the models, finite element simulation and experimental data are considered. The results show good agreement with finite element simulation and experimental data.