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Experimental and finite element analysis of superelastic behaviour of shape memory alloy for damping applications

Published online by Cambridge University Press:  05 September 2014

F. Thiebaud  and
T. Ben Zineb
F. Thiebaud*
Affiliation:
Université de Lorraine, LEMTA UMR 7563, 54500 Vandoeuvre-les-Nancy, France CNRS, LEMTA UMR 7563, 54500 Vandoeuvre-les-Nancy, France
T. Ben Zineb
Affiliation:
Université de Lorraine, LEMTA UMR 7563, 54500 Vandoeuvre-les-Nancy, France CNRS, LEMTA UMR 7563, 54500 Vandoeuvre-les-Nancy, France
*
a Corresponding author: frederic.thiebaud@univ-lorraine.fr
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Abstract

Shape memory alloys (SMA) are good candidates especially for being used as passive dampers. In order to develop the use of these alloys in structural vibrations control, the dynamical behavior of a NiTi helical spring is led, and the damping effect investigated. First, compression tests on the spring are carried out. These tests allow us to notice the effect of the maximal compression displacement, the cyclic behavior and the compression rate on its mechanical behavior. A finite element model analysis of the compression tests is then proposed. In consequence, the materials parameters have been identified after a numerical convergence test. In order to characterize the dynamical behavior of the spring, the innovative tool called equivalent complex stiffness is developed and used. Finally, the one degree of freedom vibration equation is solved with this equivalent complex stiffness. The solution of this equation clearly shows the non linear dynamical behavior of the SMA spring and its damping potential.

Keywords

Shape memory alloysexperimental compression testphenomenological modelfinite element analysisequivalent complex stiffnessdynamical behaviordamping
Type
Research Article
Information
Mechanics & Industry , Volume 15 , Issue 5 , 2014 , pp. 371 - 376
Copyright
© AFM, EDP Sciences 2014

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