Calculation Of The Stress Intensity Factor Variation Due To Residual Stress
Following An Overload
Author(s)
Ph. Darcis, J. Li & N. Recho
Abstract
Calculation of the stress intensity factor
variation due to residual stress following an
overload
Ph. Darcis, J. Li & N. Recho
LERMES, Laboratoire dJEtudes et de Recherche en MEcanique de
Structures, Universite' Blaise Pascal - Clermont 11, France
Abstract
In this paper, we propose a new approach to model the loading interaction effect
due to the overload during fatigue constant amplitude loading. This approach
concerns the retardation period immediately following the overload, until the
minimum fatigue crack growth rate is reached.
The calculation of this minimum crack growth rate, after an overload, depends
on the calculation of the restriction amount of the stress intensity factor KR, which
may have several definitions:
- The first corresponds to the opening stress intensity factor due to Elber
[I] KOP= KR.
- The second, KpR = KR, was introduced by Lang and Marci [2], in order
to distinguish the principal mechanism of the crack growth propagation.
This parameter was established following
Keywords
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