Damping Behaviour of Shape Memory Alloys: Strain Amplitude, Frequency and Temperature Effects

Piedboeuf, M. C.; Gauvin, R.; Thomas, Marc

doi:10.1006/jsvi.1998.1578

Cited by 155 publications

(102 citation statements)

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“…The reason for this discrepancy resides on the exact details of the heat boundary conditions that were overlooked in this simple model. The existence of a velocity showing a maximum damping capacity, reported by Piedbouef 18 and which are present in the experimental results is also found in our numerical simulations. Numerical results of cycles at high velocities show a slope that seems to reach an asymptotic lower limit.…”

Section: Discussionsupporting

confidence: 90%

Thermal effects in a mechanical model for pseudoelastic behavior of NiTi wires

Soul

Yawny²,

Lovey³

et al. 2007

Mat. Res.

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A mechanical model for pseudoelastic behavior of NiTi wires is proposed with the aim to predict the behavior of Shape Memory Alloys(SMA) damping wire elements in model structures. We have considered at first a simple linearwise stress-strain relationship to describe the basic isothermal behavior of the SMA members. Then, this basic model is modified in order to include the effect of the strain rate. The model is based on detailed experimental characterization performed on a Ni rich NiTi superelastic wire which included the study of the localized character of the deformation and the local heat generation associated with the stress induced martensitic transformation occurring in these alloys. Heat conduction along the wire and heat interaction with the surroundings was also considered. In that way, the resulting local temperature field around the transformation front is assessed and its effect on the progression of the transformation is evaluated. It is shown how the simple mechanical model reproduces the global mechanical behavior, including the existence of a maximum in the damping capacity with the transformation rate.

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Section: Discussionsupporting

confidence: 90%

Thermal effects in a mechanical model for pseudoelastic behavior of NiTi wires

Soul

Yawny²,

Lovey³

et al. 2007

Mat. Res.

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“…2b). The energy dissipation coefficient (or loss factor) is therefore given by the following relation [16,26,27]:…”

Section: Experimental Methods and Data Processingmentioning

confidence: 99%

Size-dependent mechanical behavior and boundary layer effects in entangled metallic wire material systems

Zhang

et al. 2016

J Mater Sci

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This paper describes the influence on the compressive and dissipative behavior of entangled metallic wire material (EMWM) samples provided by their size and mutual connectivity. The mechanical properties of EMWM specimens with different thicknesses are obtained from quasi-static compressive and cyclic loading. The behavior of the stress-strain curves, tangent modulus, and loss factor are strongly dependent on the thickness of the samples. The analysis from samples connected in different layouts shows that apart from the global thickness, size scale effects and contact interface also play important roles in controlling the behavior of EMWM systems. The importance of the sample size and its connectivity with adjacent different layers are defined by the unique microstructure and contact properties of the wires near the specimen boundary layer. The boundary layer produces different mechanical behaviors and a distinct structural configuration compared to the EMWM bulk solid. These peculiar characteristics are confirmed by microstructural and qualitative observations obtained from computed tomography scanning. The results and analysis presented in this work are relevant to designing EMWM material systems with adaptive performance under different loading and geometric constraints.

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“…This was due to the different transformation temperatures that are known to influence the damping behaviour of NiTi shape memory alloys [56].…”

Section: Explosive Weldingmentioning

confidence: 99%