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Modélisation du comportement dynamique non-linéaire des structures en matériaux mémoire de forme

Abstract : The dynamical non-linear thermomechanical behaviour of shape memory alloy (SMA) displaying superelasticity is investigated. For that purpose, the Zaki-Moumni (ZM) model, initially developped for quasi-static loading cases, is extended to simulate the uniaxial forced oscillations of a SMA device. The influence of loading rate is accounted for by considering the thermomechanical coupling in the behaviour of NiTi shape memory alloy. The model is compared to experimental results on a wire subjected to tensile loadings at different strain rates, showing good agreement. Then, the forced response of a SMA device is investigated at resonance. Both isothermal and non-isothermal conditions are accounted for, as well as non-symmetric tensile-compressive restoring force. In the case of large values of forcing amplitudes, simulation results show that the dynamic response is prone to jumps, bifurcations and chaotic solutions.
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https://pastel.archives-ouvertes.fr/pastel-00675919
Contributor : Mohamed Ould Moussa <>
Submitted on : Wednesday, June 6, 2012 - 3:18:21 PM
Last modification on : Wednesday, July 3, 2019 - 10:48:05 AM
Long-term archiving on: : Wednesday, December 14, 2016 - 9:33:47 AM

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  • HAL Id : pastel-00675919, version 1

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Mohamed Ould Moussa. Modélisation du comportement dynamique non-linéaire des structures en matériaux mémoire de forme. Matériaux et structures en mécanique [physics.class-ph]. Ecole Polytechnique X, 2011. Français. ⟨pastel-00675919⟩

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