Numerical Study Of The Stress Intensity Factors For Cracks In Raceways With The Experimentally Determined Interaction Between Crack Faces
Author(s)
M. Olzak & J Stupnicki
Abstract
Numerical study of the stress intensity factors
for cracks in raceways with the experimentally
determined interaction between crack faces
M. Olzak & J. Stupnicki
Warsaw University of Technology, Poland
Abstract
The paper presents the results obtained from numerical simulations of the
process of rolling a loaded cylinder along a raceway with an oblique crack. The
conditions of crack faces interaction were assumed based on the experimental
results. The following two conditions of crack faces interaction were adopted:
1. Crack faces covered with layers of a worn out material, the mechanical
properties of which were determined based on the results from experiments
values of normal Kyy and tangential K^ respectively, rigidities of the thin
layer containing a crack.
2. Crack faces covered with microaspherities, which forced the crack dilatation
accompanying the tangential displacements.
The simulations have proved that introduction to the numerical model of the
process the la
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