Rate and thermal sensitivities of unstable transformation behavior in a shape memory alloy

Iadicola, Mark A.; Shaw, John A.

doi:10.1016/s0749-6419(03)00040-8

Cited by 146 publications

(76 citation statements)

References 14 publications

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“…The existence of a yield point in conventional strain-driven experiments has also been reported for other martensitic alloys. 20,21 Moreover, computer simulations of the mechanical response of a strain-driven martensitic system also show a yield point. 22 For the stress-driven experiment there is a deviation of the pure elastic behavior well below the yield stress.…”

Section: Resultsmentioning

confidence: 99%

Hysteresis in a system driven by either generalized force or displacement variables: Martensitic phase transition in single-crystallineCu−Zn−Al

et al. 2007

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We report on experiments aimed at comparing the hysteretic response of a Cu-Zn-Al single crystal undergoing a martensitic transition under strain-driven and stress-driven conditions. Strain-driven experiments were performed using a conventional tensile machine while a special device was designed to perform stress-driven experiments. Significant differences in the hysteresis loops were found. The strain-driven curves show reentrant behavior ͑yield point͒ which is not observed in the stress-driven case. The dissipated energy in the stress-driven curves is larger than in the strain-driven ones. Results from recently proposed models qualitatively agree with experiments.

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Section: Resultsmentioning

confidence: 99%

Hysteresis in a system driven by either generalized force or displacement variables: Martensitic phase transition in single-crystallineCu−Zn−Al

et al. 2007

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“…Without further thermal energy released from the SIM, the heat in the specimen actually flows from near the hole to the rest of the specimen, resulting in a decrease in local temperature even though the entire specimen is still under compression. Iadicola and Shaw [2004] showed analytically that SIM occurs at localized transformation fronts even in samples without stress concentrations. The results in Figure 8 also clearly show the existence of specimen temperature changes during dynamic deformation of the SMA.…”

Section: Dynamic Experiments With the Modified Shpbmentioning

confidence: 99%

“…The effects of loading conditions other than one-dimensional were explored recently [McNaney et al 2003]. Besides the experimental research, analytical modeling is also under intensive development; examples include [Lagoudas et al 2003], [Iadicola and Shaw 2004], and [Lovey et al 2004].…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of a NiTi shape memory alloy's superelastic behavior at a high strain rate

Chen

Song

2006

JOMMS

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The temperature dependence of the dynamic compressive stress-strain behavior of a NiTi shape memory alloy (SMA) has been determined at a strain rate of 4.35 × 10 2 s −1 with a split Hopkinson pressure bar (SHPB) modified for obtaining the dynamic stress-strain loops at constant strain rates. The environmental temperature was varied from 0 to 50• C, where the SMA exhibits superelastic behavior through stress-induced martensite (SIM). Experimental results show that both the loading and unloading portions of the stress-strain loop are significantly temperature dependent. Shape memory effect below the austenite finish transition temperature, A f , and superelastic behavior above A f are also observed at the high strain rate.

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“…These models offer simplicity and implementation with fast computational algorithms, yet, do not consider the effect of strain rate on phase transformation and on the stress-strain hysteresis loops. Recent works (Prahlad and Chopra 2003;Iadicola and Shaw 2004;Vitiello et al, 2005;Auricchio et al, 2008;Morin et al, 2011;Mirzaeifar et al, 2011Mirzaeifar et al, , 2012 incorporate the effects of strain rate on the stress-strain SMA behavior by considering the thermo-mechanical aspects of phase transformation and evolution of martensitic phase fraction and thus develop experimentally verified uniaxial strain rate and temperature dependent phenomenological models.…”

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confidence: 99%

Thermo-mechanical strain rate–dependent behavior of shape memory alloys as vibration dampers and comparison to conventional dampers

Gur

Mishra

Frantziskonis

2015

Journal of Intelligent Material Systems and Structures

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A study on shape memory alloy (SMA) materials as vibration dampers is reported. An important component is the strain rate and temperature dependent constitutive behavior of SMA, which can significantly change its energy dissipation capacity under cyclic loading. The constitutive model used accounts for the thermo-mechanical, strain rate dependent behavior and phase transformation. With increasing structural flexibility the hysteretic loops size of SMA dampers increases due to increasing strain rates, thus further decreasing the response of the structure to cyclic excitation. The structure examined is a beam and its behavior with SMA dampers is compared to the same beam with conventional dampers. Parametric studies reveal the superior performance of the SMA over the conventional dampers even at the resonance frequency of the beam-damper system. An important behavior of the SMA dampers is discovered, in that they absorb energy from the fundamental and from higher vibration modes. In contrast the conventional dampers transfers energy to higher modes. For the same beam control, the stiffness requirement for the SMA dampers is significantly less than that of the conventional dampers. Response quantities of interest show improved performance of the SMA over the conventional dampers under varying excitation intensity, frequency, temperature, and strain rate.

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Rate and thermal sensitivities of unstable transformation behavior in a shape memory alloy

Cited by 146 publications

References 14 publications

Hysteresis in a system driven by either generalized force or displacement variables: Martensitic phase transition in single-crystallineCu−Zn−Al

Hysteresis in a system driven by either generalized force or displacement variables: Martensitic phase transition in single-crystallineCu−Zn−Al

Temperature dependence of a NiTi shape memory alloy's superelastic behavior at a high strain rate

Thermo-mechanical strain rate–dependent behavior of shape memory alloys as vibration dampers and comparison to conventional dampers

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