An experimental study on a self-centering damper based on shape-memory alloy wires

Falahian, Afsaneh; Asadi, Payam; Riahi, Hossein Tajmir; Kadkhodaei, Mahmoud

doi:10.1080/15397734.2021.1939048

Cited by 14 publications

(4 citation statements)

References 56 publications

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“…The temperature evolution under the cyclic loading of different frequencies was investigated in [27] proving that the temperature rise becomes significant in the highfrequency range. Tests under various loading rates were also conducted in [28][29] indicating the self-heating of the specimens due to the loading rate increase.…”

Section: Rate-dependency Of Superelastic Smasmentioning

confidence: 99%

Modeling the Influence of Strain-Rate in Superelastic Shape Memory Alloys

Ntina

2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Shape Memory Alloys (SMAs) are materials with appealing properties. They have the ability to recover stress-induced strains performing the superelastic effect, ideally resulting in insignificant residual strain (re-centering capability). A dependency of their behavior, exhibiting different hysteresis loops, has been reported on temperature and loading rate variations, maximum deformation, material composition and treatments. Presenting a wide applicability potential, SMAs have been intensively investigated in various sectors possessing a considerable place in structural engineering. Studies have been published developing constitutive models to simulate their behavior presenting some drawbacks: the inability to capture the ratedependent nature, the large number of parameters, complexity and difficulty of implementation. In this context, a uniaxial rate-dependent constitutive model based on Graesser and Cozzarelli model for superelastic SMAs, aimed at capturing their essential hysteretic response has been developed. After the verification of the model prediction comparing it with experimental data derived from literature, a comparison with the rate-independent model of Auricchio and Sacco (1997) is attempted to indicate the effect of the rate-dependency. Results showed that the proposed model managed to successfully simulate the influence of strain rate using a simple equation rendering feasible the potential implementation of a robust solution algorithm easy to program in commercial software constituting a valid and effective computational tool for the analysis of superelastic SMAs.

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Section: Rate-dependency Of Superelastic Smasmentioning

confidence: 99%

Modeling the Influence of Strain-Rate in Superelastic Shape Memory Alloys

Ntina

2023

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…Some researchers have found that damping capacity is influenced by strain amplitude as well as tension-compression cyclic loading [21]. However, it is also observed that an increase in the frequency of loading develops heat in SMA wires which results into decrease in damping capacity [22].…”

Section: Introductionmentioning

confidence: 99%

Analytical assessment of stay cable vibration mitigation using shape memory alloy wire

RAJORIYA

Mishra

2023

Eng. Res. Express

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The stay cables are axial load-carrying members in cable-stayed bridges and are subjected to the problems of large amplitude oscillations mainly due to wind. The investigations presented in this paper attempt to tackle the problem by the application of a shape memory alloy wire, which are understood to have excellent recovery property under large deformation. The aim is to determine how the dynamic behavior of a taut steel cable changes when a Ni-Ti SMA wire is connected to the cable and which location of SMA at the taut cable may provide the best results in terms of vibration dissipation of the cable. Before the analytical study on the taut cable, the behavior of Ni-Ti SMA wire in hysteresis was studied under different strain as well as in tension and compression loadings. The responses of the cable with and without SMA wire were determined in free as well as in forced vibrations. The SMA wire was used at different locations of the cable to determine its most effective location and the damping introduced to the cable. The variation of the amplitude response is investigated at varying excitation frequencies. It is found that the SMA wire can be effectively used as a damping element in dissipating the cable oscillation. It is also found that the mid-length of the cable where maximum amplitude dissipation occurs is the best location, although not a practical one, to attach the SMA wire.

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“…Recognizing this challenge, researchers have shifted their focus towards developing dampers with built-in self-centering capabilities, offering a comparative advantage over traditional frictional dissipators [14]. Examples include a vertical-shear self-centering damper for enhancing seismic performance [15], self-centering friction spring dampers for seismic resilience [16], shock absorbers with a self-centering capacity [16], self-centering dampers and bar centering within columns [17], a self-centering damper based on shape memory alloy wires [18], a seismic bracing system based on a superelastic shape memory alloy ring [19], an asymmetrical friction damper to improve the seismic behavior of tension-only braces [20], and a slack-free connection to improve the seismic behavior of tension-only braces [21], among others. Some seismic isolation devices also provide frictional dissipation and have self-centering capabilities, such as the wire rope isolator [22,23].…”

Section: Introductionmentioning

confidence: 99%

Improvement of the Analytical Model of an Energy Dissipator and Validation with Experimental Tests of a Prototype

Balboa-Constanzo,

Maureira-Carsalade,

Sanhueza-Espinoza

et al. 2023

Buildings

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An improved numerical formulation for a self-centering frictional damper is presented. This was experimentally validated through quasi-static tests carried out on a steel-made prototype of the damper. Its design is ad hoc for implementation in the seismic protection of industrial storage racks. The conceptual model of the device was adjusted to the prototype built. The formulation of the analytical model, a parametric analysis of it, and the validation with experimental results are presented. The improvement of the model presented here explicitly considers elements included in the prototype, such as a system of load transmission rings and the friction between all of the components that slide or rotate relatively. In the experimental validation, the parameters of the improved model were determined. The numerical predictions for the improved model were contrasted with those obtained with the original one and with the experimental results. This demonstrates that the improvement leads to a better adjustment of the numerical predictions concerning the experimental measurements, which is useful for nonlinear analysis. The device withstood forces of considerable magnitude in addition to dissipating enough energy per load–unload cycle to be effective in the seismic protection of industrial storage racks.

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An experimental study on a self-centering damper based on shape-memory alloy wires

Cited by 14 publications

References 56 publications

Modeling the Influence of Strain-Rate in Superelastic Shape Memory Alloys

Modeling the Influence of Strain-Rate in Superelastic Shape Memory Alloys

Analytical assessment of stay cable vibration mitigation using shape memory alloy wire

Improvement of the Analytical Model of an Energy Dissipator and Validation with Experimental Tests of a Prototype

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