2012
DOI: 10.1016/j.ijsolstr.2011.09.009
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Experimental analysis of the quasi-static and dynamic torsional behaviour of shape memory alloys

Abstract: International audienceThis paper investigates experimentally the quasi-static and dynamic torsional behaviour of shape memory alloys wires under cyclic loading. A specifically designed torsional pendulum made of a Ni–Ti wire is described. Results on the quasi-static behaviour of the wire obtained using this setup are presented, giving an overall view of the damping capacity of the material as function of the amplitude of the loading (imposed torsional angle), the frequency and the temperature. The dynamical be… Show more

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Cited by 24 publications
(27 citation statements)
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“…A common approach to develop shear stress relationships is to divide the wire cross-section into three different transformation zones: an inner austenitic core, a phase transition region and an outer transformed martensitic layer [13,44] in [38]). Hence, such approaches have not shown the capability to capture temperature dependence or complex internal loops commonly observed with superelastic responses as they are heavily dependent on such phase diagram information [4,31].…”
Section: Radius (R )mentioning
confidence: 99%
“…A common approach to develop shear stress relationships is to divide the wire cross-section into three different transformation zones: an inner austenitic core, a phase transition region and an outer transformed martensitic layer [13,44] in [38]). Hence, such approaches have not shown the capability to capture temperature dependence or complex internal loops commonly observed with superelastic responses as they are heavily dependent on such phase diagram information [4,31].…”
Section: Radius (R )mentioning
confidence: 99%
“…The shear strain tends to zero at the core of the specimen cross-section as the wire twists [2]. This implies that the possibility of having a fully transformed case can only be possible if the angle of twist asymptotically reaches infinity [3]. Figure 5.1 is typical partially transformed case seen in wires/springs under torsion.…”
Section: Geometry Factorsmentioning
confidence: 99%
“…Machado and Lagoudas (2006), Machado et al (2007a,b) investigated the dynamics and chaos of a nonlinear oscillator with SMA component by numerical simulations and experiments. Recently, Doaré et al (2012) and Sbarra et al (2011) conducted an experimental study on the quasi-static and dynamic torsional behaviour of NiTi wire. Though the jump phenomenon of rotational angle on the FRC was observed in experiments, thermal aspect of the dynamic system and the thermomechanical coupling effects were not considered.…”
Section: Introductionmentioning
confidence: 99%