Equivalent linear stiffness and damping of a shape memory alloy bar operating at isothermal and non-isothermal condition

Jose, S.; Chakraborty, Goutam; Bhattacharyya, Ranjan

doi:10.1177/1045389x18778361

Cited by 4 publications

(4 citation statements)

References 36 publications

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“…NiTi shape memory alloys (SMAs) have been widely utilized in various fields, including aerospace, medical treatment, mechanics, and chemistry, due to their exceptional shape memory effect (SME), superelasticity, wear resistance, and corrosion resistance. [1,2] As science and technology continue to advance, the engineering applications of NiTi SMAs are steadily increasing. [2] It is widely recognized that when the grain size reaches the nanoscale, the specific surface area of materials increases significantly.…”

Section: Introductionmentioning

confidence: 99%

Surface Effect on Phase Transformation of Single Crystal NiTi Shape Memory Alloys Studied by Molecular Dynamics Simulation

Liu

Wang

et al. 2023

Adv Eng Mater

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Surface effect on phase transformation of single crystal (SC) NiTi shape memory alloys (SMAs) with various thicknesses and various Ni contents is studied by molecular dynamics simulation. For the SMAs with various thicknesses considering surface effect, the residual strain, the average atomic potential energy, and the four characteristic phase transformation temperatures all increase, and fewer twinned martensite boundaries are left after cooling compared to the sample without considering surface effect. Moreover, with increasing thickness of the sample, the surface effect is gradually weakened, and there is no obvious regularity in phase transformation characteristics. For the SMAs with various Ni contents considering surface effect, segmental martensite phase transformation, phase transformation fluctuation, and wider phase transformation temperature ranges are observed, whereas these phenomena do not occur in the sample without considering surface effect. With the increasing of Ni contents, for both cases of considering surface effect or not, the critical stress of phase transformation, average atomic potential energy, the modulus of detwinned martensite increase, but the phase transformation temperature and modulus of twinned martensite decrease.

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Section: Introductionmentioning

confidence: 99%

Surface Effect on Phase Transformation of Single Crystal NiTi Shape Memory Alloys Studied by Molecular Dynamics Simulation

Liu

Wang

et al. 2023

Adv Eng Mater

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“…Various investigations have been performed to evaluate the complex deformation mechanisms associated with the NiTi system [10][11][12][13][14]. All these studies contributed to garnering a scientific basis for the NiTi system.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on Deformation Behaviour of Superelastic NiTi with Traditional Elastic–Plastic Alloys in Sub-micron Scale

Kumar

Sen

2021

Trans Indian Inst Met

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A nanoindentation-based study is conducted to analyse the small-scale deformation behaviour of superelastic NiTi-based shape memory alloy. The mechanism is compared with respect to that for traditional elastic-plastic ferrous and non-ferrous alloys: ferritic stainless steel of grade 409 and Al. To develop a comprehensive insight into the deformation behaviour, various experiments including nanoindentation, optical microscopy, X-ray diffraction, differential scanning calorimetry are performed on all alloy systems. This detailed study demonstrates that structural properties are primarily controlled by the crystal structures of the phases present in the respective alloy systems. Among these three studied alloys, the highest and lowest nano-hardness is realized for the steel and Al, respectively. Intermediate hardness is noted for the NiTi alloy. Nevertheless, the localized deformation characteristics of the superelastic alloy appeared to be entirely different in relation to that for the ferrous and non-ferrous materials. Most importantly, a fourfold increment in the depth recovery is realized for the NiTi alloy in contrast to the traditional metallic system. To understand this exceptional recovery, detailed analysis is performed on the unloading response of all the alloys. The crucial role of reversible stress-induced martensitic transformation in contributing towards the depth recoverability for superelastic NiTi alloy is thereby revealed.

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“…Nevertheless, it is possible for a simple SMA made structure to explicitly link the material behaviour to the dynamic response of the whole structure in order to evaluate its intrinsic damping capacity. Most of the numerical and experimental studies concern one-dimensional oscillators made up of SMA parts in the form of spring or wire submitted to harmonic axial vibrations (see Böttcher et al, 2017; dos Reis et al, 2019; Jose et al, 2018; Lacarbonara et al, 2004; Lagoudas et al, 2005; Schmidt and Lammering, 2004; Zhuo et al, 2019). Less studies concern beam submitted to transversal vibrations (see Razavilar et al, 2018; Zbiciak, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Eventually, a third proposal involving the strain and stress values at maximal strain can be widely found in literature (see Fantozzi, 2001; Jose et al, 2018):…”

Section: Introductionmentioning

confidence: 99%

On the understanding of damping capacity in SMA: From the material thermomechanical behaviour to the structure response

Helbert

Volkov

Evard

et al. 2020

Journal of Intelligent Material Systems and Structures

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Superelastic Shape Memory Alloys (SMAs) provide a high damping capacity due to the hysteretic motion of the inter-phase boundaries during the martensitic transformation. They have demonstrated their ability to control vibrations of SMA-based Civil Engineering and Aerospace structures. In order to improve existing damping devices, characterization of SMA damping capacity is necessary, despite the lack of a standard procedure. Classical characterizations such as tensile or torsion tests on SMA samples are very attractive, the fact that they are common and simple to process. Furthermore, environment and loading conditions are quite easy to control. Different energy-based formulations have been proposed in the literature to explicitly predict SMA damping capacity from the hysteretic mechanical behaviour. The aim of this paper is to classify commonly used formulations from the literature, using a new thermomechanical vibration numerical model of a SMA beam structure. Thus, three energy-based predictions of SMA intrinsic damping ratio measured at the material scale are compared to the damping ratio measured from the free vibration signal at the SMA beam structure scale, taken as the objective reference. The formulation proposed by Piedbœuf and Gauvin provided a better match in three study-cases.

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Equivalent linear stiffness and damping of a shape memory alloy bar operating at isothermal and non-isothermal condition

Cited by 4 publications

References 36 publications

Surface Effect on Phase Transformation of Single Crystal NiTi Shape Memory Alloys Studied by Molecular Dynamics Simulation

Surface Effect on Phase Transformation of Single Crystal NiTi Shape Memory Alloys Studied by Molecular Dynamics Simulation

A Comparative Study on Deformation Behaviour of Superelastic NiTi with Traditional Elastic–Plastic Alloys in Sub-micron Scale

On the understanding of damping capacity in SMA: From the material thermomechanical behaviour to the structure response

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