Three-Dimensional Constitutive Model Considering Transformation-Induced Damage and Resulting Fatigue Failure in Shape Memory Alloys
In this work, a constitutive model is developed that describe the behavior of shape memory alloys undergoing a large number of cycles, developing internal damage, and eventually failing. Physical mechanisms associated with martensitic phase transformation occurring during cyclic loadings such as transformation strain generation and recovery, transformation-induced plasticity, and fatigue damage are all taken into account within a thermo-dynamically consistent framework. Fatigue damage is described utilizing a continuum theory of damage. The damage growth rate has been formulated as a function of both the stress state and also the magnitude of the transformation strain, while the complete or partial nature of the transformation cycles is also considered as per experimental observations. Simulation results from the model developed are compared to uniaxial actuation fatigue tests at different stress levels. It is shown that both lifetime and the evolution irrecoverable strain can be accurately simulated.
Fichier(s) constituant cette publication
Cette publication figure dans le(s) laboratoire(s) suivant(s)
Visualiser des documents liés par titre, auteur, créateur et sujet.
Periodic homogenization for fully coupled thermomechanical modeling of dissipative generalized standard materials CHATZIGEORGIOU, George; CHARALAMBAKIS, Nicolas; CHEMISKY, Yves; MERAGHNI, Fodil (Elsevier, 2016)The current work deals with periodic thermomechanical composite media, in which the material constituents are considered to obey the generalized standard materials laws. The aim is to provide a proper homogenization framework ...
Endommagement en fatigue du PA66 renforcé par des fibres de verre courtes : modélisation micromécanique et stratégie d'identification multi - échelles DESPRINGRE, Nicolas; CHEMISKY, Yves; FITOUSSI, Joseph; MERAGHNI, Fodil (2015)Cet article présente un modèle micromécanique visco-endommageable pour les composites à matrice thermoplastique renforcée par des fibres de verre courtes et soumis à un chargement en fatigue. L'approche multi-échelles ...
Hierarchical micromechanical modeling of the viscoelastic behavior coupled to damage in SMC and SMC-hybrid composites ANAGNOSTOU, Dimitrios; CHATZIGEORGIOU, George; CHEMISKY, Yves; MERAGHNI, Fodil (ELSEVIER, 2018)The aim of this paper is to study, through a multiscale analysis, the viscoelastic behavior of glass reinforced sheet molding compound (SMC) composites and SMC-hybrid composites mixing two types of bundle reinforcement: ...
PATOOR, Etienne; MOHARA, Guillaume; CHATZIATHANASIOU, Dimitris; CHEMISKY, Yves; CHATZIGEORGIOU, George; MERAGHNI, Fodil (2016)A transformation criterion that includes the effect of tension-compression asymmetry and texture-induced anisotropy is used to describe the size of the transformation region surrounding the tip of an edge crack in a shape ...
CHATZIATHANASIOU, Dimitris; BOURGEOIS, Nadine; CHEMISKY, Yves; MERAGHNI, Fodil (2016)In this work, the influence of the direction and the history of thermomechanical loading of NiTi shape memory alloys on the overall material behavior is experimentally investigated. In the first part, cyclic biaxial ...