Non linear dynamical behaviour of shape memory alloys and optimisation of damping effect. Study of a passive damper

Frédéric Thiebaud (1) , Manuel Collet (1) , Emmanuel Foltete (1) , Christian Lexcellent (1) , Vincent Placet (1)

1 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)

Shape Memory Alloys (SMAs) are good candidates for being used as passive dampers, strain sensors, stiffness or shape drivers. In order to develop the use of these alloys in structural vibration control, we present in this paper how the implementation (Thiebaud & al. (2007)) of a phenomenological model based on the Rl model (Raniecki & al. (1992)) in a finite element code is used. This implementation permits us to simulate internal loops in order to characterize the stiffness and the damping effect by an Equivalent Complex Young's Modulus approach under many static strain offsets. The results confirmed a dynamic mechanical analysis leaded on a SMA wire sample and, clearly show us the influence of an initial static strain offset and the amplitude of vibration on the damping effect and the stiffness.

Mots clés: Damping Effect; DMA Analysis; Harmonic Balance; Shape Memory Alloys; Numerical Implementation; Equivalent Complex Young’s Modulus

Domaines: Mécanique des matériaux [physics.class-ph]; Vibrations [physics.class-ph]

Frédéric Thiebaud, Manuel Collet, Emmanuel Foltete, Christian Lexcellent, Vincent Placet. Non linear dynamical behaviour of shape memory alloys and optimisation of damping effect. Study of a passive damper. 10th European Mechanics of Materials Conference "Multi-phases and multi-components materials under dynamic loading” (EMMC-10), Jun 2007, Kazimierz Dolny, Poland. pp.338-342. ⟨hal-00348449⟩