Bending Fatigue Properties of a Superelastic Thin Tube and a High-Elastic Thin Wire of TiNi Alloy

Tobushi, Hisaaki; Furuichi, Yuji; Sakuragi, Toshimi; Sugimoto, Yoshiki

doi:10.2320/matertrans.m2009073

Cited by 7 publications

(15 citation statements)

References 13 publications

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“…8a-c and 9) 2,22,99 Rotating bending testing is used extensively for HCF testing and for accelerated testing, particularly in small diameter wires. 2,7,8,12,14,[22][23][24][26][27][28][29][30][31][32]35,[38][39][40][41]43,[45][46][47][48][49][50][51][52][53][54][55][57][58][59][60][61][63][64][65][66][67][68][69][70][105][106][107] This method, depending on the nature ...…”

Section: Tension-tension Fatigue Testingmentioning

confidence: 99%

“…The legacy data includes Nitinol and other NiTi-based alloys in the single wire form only and is dominated by rotating bending (Fig. 8a-c) fatigue test techniques 22,24,[26][27][28][29]31,32,38,39,41,[45][46][47][48][49][50][51][52][53][54][55]57,59,61,[63][64][65][66][67][68][69][70] with a few additional investigations on alternate fatigue methods including alternating bending (Fig. 8a), 29,39,62,63 axial, 25,33,36,37,42,56,72 pulsatile (Fig.…”

Section: Compositesmentioning

confidence: 99%

“…A variety of test techniques have been developed to characterise the fatigue properties of wires and cables. Wire fatigue tests reported in the literature for use in evaluating biomedical materials such as alternating bending testing, 29,30,39,62,63 axial fatigue testing, 25,33,36,37,42,44,56,72 flex bending fatigue testing, 4,10,11,34 pulsatile fatigue testing, 29,39,63,67 rotating bending testing 2,7,8,12,14,[22][23][24][26][27][28][29][30][31][32]35,[38][39][40][41]43,[45][46][47][48][49][50][51]…”

Section: Introductionmentioning

confidence: 99%

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Fatigue and fracture of wires and cables for biomedical applications

Gbur

Lewandowski

2016

International Materials Reviews

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Fine wires and cables play a critical role in the design of medical devices and subsequent treatment of a large array of medical diagnoses. Devices such as guide wires, catheters, pacemakers, stents, staples, functional electrical stimulation systems, eyeglass frames and orthodontic braces can be comprised of wires with diameters ranging from 10s to 100s of micrometres. Reliability is paramount as part of either internal or external treatment modalities. While the incidence of verified fractures in many of these devices is quite low, the criticality of these components requires a strong understanding of the factors controlling the fracture and fatigue behaviour. 1,2 Additionally, optimisation of the performance and reliability of these devices necessitates characterisation of the fatigue and fracture properties of its constituent wires. A review of cable architecture and stress states experienced during testing is followed by an overview of the effects of changes in material composition, microstructure, processing and test conditions on fracture and fatigue behaviour of wire and cable systems used in biomedical applications. The review concludes with recommendations for future work.

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Section: Tension-tension Fatigue Testingmentioning

confidence: 99%

Section: Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Fatigue and fracture of wires and cables for biomedical applications

Gbur

Lewandowski

2016

International Materials Reviews

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“…During the CurviPicker's intended operations, the backbones all undergo cyclic elastic deformations. According an existing study where thin nitinol wires were tested for fatigue behaviors (Tobushi et al, 2009), the maximal strain is 0.7 per cent to 0.8 per cent for 10 6 cycles with a loading frequency of 8.33 Hz (500 cycles per minute). Then a constraint on the bending strain is hence formulated in equation ( 16):…”

Section: Structural Optimizationmentioning

confidence: 99%

CurviPicker: a continuum robot for pick-and-place tasks

Yang

Zhao

Liang

et al. 2019

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Purpose Pick-and-place tasks are common across many industrial sectors, and many rigid-linked robots have been proposed for this application. This paper aims to alternatively present the development of a continuum robot for low-load medium-speed pick-and-place tasks. Design/methodology/approach An inversion of a previously proposed dual continuum mechanism, as a key design element, was used to realize the horizontal movements of the CurviPicker’s end effector. A flexible shaft was inserted to realize rotation and translation about a vertical axis. The design concept, kinematics, system descriptions and proof-of-concept experimental characterizations are elaborated. Findings Experimental characterizations show that the CurviPicker can achieve satisfactory accuracy after motion calibration. The CurviPicker is easy to control due to its simple kinematics, while its structural compliance makes it safe to work with, as well as less sensitive to possible target picking position errors to avoid damaging itself or the to-be-picked objects. Research limitations/implications The vertical translation of the CurviPicker is currently realized by moving the flexible shaft. Insertion of the flexible shaft introduces possible disturbances. It is desired to explore other form of variations to use structural deformation to realize the vertical translation. Practical implications The proposed CurviPicker realizes the Schöenflies motions via a simple structure. Such a robot can be used to increase robot presence and automation in small businesses for low-load medium-speed pick-and-place tasks. Originality/value To the best of the authors’ knowledge, the CurviPicker is the first continuum robot designed and constructed for pick-and-place tasks. The originality stems from the concept, kinematics, development and proof-of-concept experimental characterizations of the CurviPicker.

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“…Bowden [13] considers possible deviations of stretched wire from the simple 2-dimensional catenary form. Tobushi et al [14] conducted experiments to investigate the deformation behaviours and fatigue properties of a superelastic thin tube (SE-tube) and a high-elastic thin wire (HE-wire) of TiNi alloy under conditions of pulsating-plane, alternating-plane and rotating bending. Antherieu et al [15] proposed and developed a new principle using two universal joints to enable pure bending conditions.…”

Section: Introductionmentioning

confidence: 99%

Determining elastic modulus of the material by measuring the deflection of the beam loaded in bending

Miljojković

Bijelić²,

Vranić

et al. 2017

Teh. vjesn.

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Preliminary communicationThe paper presents a theoretical model and design solution for the device which determines the modulus of elasticity by bending the material (test samples), instead of the usual stretching. The device was designed, assembled and successfully tested in the laboratory. Experimental determination of the elastic modulus was conducted by measuring the deflection of samples under a constant load. Values of the elastic modulus resulted from theoretical relations. Measurement was performed and measurement errors, i.e. device errors, were analysed. Keywords: deflection; device for determining the modulus of elasticity; elastic modulus; stressOdređivanje modula elastičnosti materijala mjerenjem progiba grede opterećene na savijanje Prethodno priopćenje U radu je dan teorijski model i projektno rješenje uređaja za određivanje modula elastičnosti na osnovi savijanja, a ne istezanja materijala (ispitnih uzoraka) kao što je uobičajeno. Uređaj je projektiran, realiziran i uspješno testiran u laboratoriju. Provedeno je eksperimentaln o određivanje modula elastičnosti mjerenjem vrijednosti progiba ispitivanih uzoraka materijala pri konstantnom opterećenju. Na bazi teorijskih ovisnosti, dolazi se do vrijednosti modula elastičnosti. Provedeno je mjerenje i analizirane su greške mjerenja, odnosno uređaja.

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Bending Fatigue Properties of a Superelastic Thin Tube and a High-Elastic Thin Wire of TiNi Alloy

Cited by 7 publications

References 13 publications

Fatigue and fracture of wires and cables for biomedical applications

Fatigue and fracture of wires and cables for biomedical applications

CurviPicker: a continuum robot for pick-and-place tasks

Determining elastic modulus of the material by measuring the deflection of the beam loaded in bending

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