Fatigue Properties of Superelastic Ti-Ni Filaments Used in Braided Cables for Bone Fixation

Baril, Yannick; Braïlovski, Vladimir; Terriault, Patrick

doi:10.4028/www.scientific.net/ast.57.235

Cited by 5 publications

(1 citation statement)

References 10 publications

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“…For example, orthodontic tests using bits involve highly complex deformations, including rotating-bending and bending-bending and/or compression, bending, torsion or buckling. Studies on wires for bone fixation and fundamental studies on wires have also been reviewed [98][99][100][101][102][103].…”

Section: Niti Fracture Lifementioning

confidence: 99%

Shape memory alloys as an effective tool to damp oscillations

Torra¹,

Isalgué

Lovey

et al. 2015

J Therm Anal Calorim

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The SMA was studied for their macroscopic application in damping for civil engineering. The study is a synthesis and includes an outline of the models required for the SMA simulation and some case studies using the finite element analysis methods. This work is an overview that focuses in the mitigation of the oscillations in structures induced by earthquakes, and for a reduction of the oscillations amplitude in stayed cables under the action of rain, wind or traffic. The analysis needs the required conditions for each application determining the working conditions. The study includes the number of working cycles, the temperature effects and the cooling actions and, for instance, the action of the cycling frequency. The main target relates the appropriateness of the SMA for each purpose, and the suitability of the SMA device is always experimentally guaranteed. Furthermore, the applicability of the obtained results for SMA and the practical behavior of the SMA dampers were studied in international facilities. The paper includes appropriate suggestions for a correct preparation of the SMA dampers. This work outlines the effects of stress and temperature aging in NiTi, describes the particular structural effects between 18R and 6R, introduces a first attempt in the dynamic properties of the CuAlBe single crystals and summarizes some recent suggestions for damping using SMA.Keywords Shape memory alloys Á Martensitic transformation Á NiTi Á CuAlBe Á Damping Á Fatigue Part oneThe martensitic transformation (MT) is the origin of the unique properties of shape memory alloys (SMA) [1,2]. MT is a first-order phase transition between metastable phases with hysteresis. The transformation takes place with small displacements of the atoms and without any change in the positions of the neighboring atoms: Atomic order is conserved in the transformation. The transformation can be induced by temperature or by external forces, such as traction or compression. In temperature-induced transformations, M s (martensite start) denotes the starting temperature. The M f (martensite finish) temperature determines the end of the transformation, and A s and A f denote the austenite start and the austenite finish temperatures, respectively. This part was devoted to general contents and properties of the SMA appropriate for damping of oscillations. In particular, reduction of oscillations appeared in civil engineering structures.

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Section: Niti Fracture Lifementioning

confidence: 99%

Shape memory alloys as an effective tool to damp oscillations

Torra¹,

Isalgué

Lovey

et al. 2015

J Therm Anal Calorim

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Built in dampers for stayed cables in bridges via SMA. The SMARTeR-ESF project: A mesoscopic and macroscopic experimental analysis with numerical simulations

Torra

Auguet

Isalgué

et al. 2013

Engineering Structures

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Shape Memory Alloys (SMAs) are good candidates for solid-state dampers appropriate for the oscillations of bridge stay cables because of their large recoverable strain, hysteresis and reasonable fatigue-life. This work experimentally analyzes the relevant properties of NiTi SMA and conducts facility measurements, frequency analyzes and simulations of the effects of SMA on stay cables. Appropriate phenomenological SMA models were developed and included in a Finite Element (FE) simulation environment. A complete damping solution for bridge stay cables was developed from these experimental analyzes. This paper detail the required properties for a NiTi SMA and analyzes their performance. For instance, the fatiguelife and several of the thermo-mechanical effects influencing the application of NiTi SMAs are outlined. The damping effect of the SMA was studied in two facilities. The first series of measurements was performed using cable 1 of the ELSA facility (JRC-EU, Ispra, Italy). The second was completed in two campaigns at IFSTTAR (Bouguenais, near Nantes in France). The numeric analyzes and simulated results were completely coherent with these experiments: the SMA dampers also drastically reduce the maximum oscillation amplitude induced by the simulated action. The frequency evolution of the damped cable was studied using direct calculations on the signals, the windowed Fourier transform and Morlet wavelets.

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Tensile response of braided structures: a review

Rawal

Saraswat

Sibal

2015

Textile Research Journal

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Braiding is a highly versatile and cost-effective method of producing structures that has been successfully used for numerous applications ranging from ropes, composites, biomedical uses, insulation to sports and recreation activities, and the list of applications of braided structures is ever-increasing. The prediction of tensile property is a pre-requisite for the success of deployment of braided structures in these applications. This paper reviews the key parameters that control the tensile properties of biaxial and triaxial braided structures along with the models developed for these braids by various researchers with different fields of interest. In general, the tensile properties of braided structures are strongly dependent upon their architecture and the kinematics and mechanics involved in the braid formation. Furthermore, various approaches and methodologies have also been presented for the tensile models of braids consisting of an elastic core and multi-layered structures.

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Fatigue Properties of Superelastic Ti-Ni Filaments Used in Braided Cables for Bone Fixation

Cited by 5 publications

References 10 publications

Shape memory alloys as an effective tool to damp oscillations

Shape memory alloys as an effective tool to damp oscillations

Built in dampers for stayed cables in bridges via SMA. The SMARTeR-ESF project: A mesoscopic and macroscopic experimental analysis with numerical simulations

Tensile response of braided structures: a review

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