Since 1963
ARTICLE
Numerical modelling of the ratchetting effect under uniaxial and multiaxial loading conditions
1
National School of Applied Sciences (ENSAH), Al-Hoceima, and Faculty of Science, Mohamed Premier University, Oujda
2
Team of Mechanics and Scientific Computing (ENSA), Mohamed Premier University, Oujda
3
AFORPA, CFA, Issy-les-Moulineaux, France
Submission date: 2018-08-27
Acceptance date: 2019-05-16
Online publication date: 2019-10-15
Publication date: 2019-10-15
Journal of Theoretical and Applied Mechanics 2019;57(4):897-907
KEYWORDS
self-consistent modeluni- and multiaxial ratchettingnon-incremental interactionlawellipsoidal inclusionelasto-inelasticity
ABSTRACT
The main objective of the present work is to numerically test the performance of a mi-
cromechanical model under stress-controlled cyclic loading conditions. This simplified non-
incremental model has a peculiarity of taking into account the grain shape effect and in-
troduces an isotropic hardening variable for each slip system. The model shows an ability
to predict accommodation, uni- and multiaxial ratchetting phenomena for complex loading
paths. The uniaxial ratchetting is more pronounced for relatively higher mean stresses. Mo-
reover, the evolution of intragranular isotropic hardening, mainly in path 1, is found to be
dependent on both the sliding nature and the increase of the ACSS number in the case of
multiaxial ratchetting. Finally, the main advantage of the explored multiscale approach is
in its capability to describe local heterogeneities.
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| eISSN: | 2543-6309 |
| ISSN: | 1429-2955 |
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