Effect of the thermomechanical coupling on fatigue crack propagation in NiTi shape memory alloys

Yajun You; Yahui Zhang; Ziad Moumni; Gunay Anlas; Weihong Zhang

doi:10.1016/j.msea.2016.12.126

Effect of the thermomechanical coupling on fatigue crack propagation in NiTi shape memory alloys

Yajun You, Yahui Zhang, Ziad Moumni, Gunay Anlas, Weihong Zhang

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

In this paper, the effect of thermo-mechanical coupling on fatigue crack propagation in a NiTi pseudo-elastic shape memory alloy (SMA) is investigated. Single Edge Crack (SEC) specimens are loaded at different frequencies to see the effect of frequency on mechanical response of the edge cracked NiTi plate. The crack length and the temperature at the crack tip are measured using an Infrared Thermography (IR) camera. In particular, the evolutions of the maximum temperature at the crack tip and the crack length with respect to number of loading cycles at different loading frequencies are plotted. The results show that the crack growth rate is significantly frequency-dependent, and the growth rate decreases with increasing frequency.

Original language	English
Pages (from-to)	50-56
Number of pages	7
Journal	Materials Science and Engineering: A
Volume	685
DOIs	https://doi.org/10.1016/j.msea.2016.12.126
State	Published - 8 Feb 2017

Keywords

Crack propagation
Fatigue
Loading frequency
Shape memory alloys
Thermo-mechanical coupling

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10.1016/j.msea.2016.12.126

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title = "Effect of the thermomechanical coupling on fatigue crack propagation in NiTi shape memory alloys",

abstract = "In this paper, the effect of thermo-mechanical coupling on fatigue crack propagation in a NiTi pseudo-elastic shape memory alloy (SMA) is investigated. Single Edge Crack (SEC) specimens are loaded at different frequencies to see the effect of frequency on mechanical response of the edge cracked NiTi plate. The crack length and the temperature at the crack tip are measured using an Infrared Thermography (IR) camera. In particular, the evolutions of the maximum temperature at the crack tip and the crack length with respect to number of loading cycles at different loading frequencies are plotted. The results show that the crack growth rate is significantly frequency-dependent, and the growth rate decreases with increasing frequency.",

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author = "Yajun You and Yahui Zhang and Ziad Moumni and Gunay Anlas and Weihong Zhang",

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T1 - Effect of the thermomechanical coupling on fatigue crack propagation in NiTi shape memory alloys

AU - You, Yajun

AU - Zhang, Yahui

AU - Moumni, Ziad

AU - Anlas, Gunay

AU - Zhang, Weihong

PY - 2017/2/8

Y1 - 2017/2/8

N2 - In this paper, the effect of thermo-mechanical coupling on fatigue crack propagation in a NiTi pseudo-elastic shape memory alloy (SMA) is investigated. Single Edge Crack (SEC) specimens are loaded at different frequencies to see the effect of frequency on mechanical response of the edge cracked NiTi plate. The crack length and the temperature at the crack tip are measured using an Infrared Thermography (IR) camera. In particular, the evolutions of the maximum temperature at the crack tip and the crack length with respect to number of loading cycles at different loading frequencies are plotted. The results show that the crack growth rate is significantly frequency-dependent, and the growth rate decreases with increasing frequency.

AB - In this paper, the effect of thermo-mechanical coupling on fatigue crack propagation in a NiTi pseudo-elastic shape memory alloy (SMA) is investigated. Single Edge Crack (SEC) specimens are loaded at different frequencies to see the effect of frequency on mechanical response of the edge cracked NiTi plate. The crack length and the temperature at the crack tip are measured using an Infrared Thermography (IR) camera. In particular, the evolutions of the maximum temperature at the crack tip and the crack length with respect to number of loading cycles at different loading frequencies are plotted. The results show that the crack growth rate is significantly frequency-dependent, and the growth rate decreases with increasing frequency.

KW - Crack propagation

KW - Fatigue

KW - Loading frequency

KW - Shape memory alloys

KW - Thermo-mechanical coupling

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SN - 0921-5093

VL - 685

SP - 50

EP - 56

JO - Materials Science and Engineering: A

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Effect of the thermomechanical coupling on fatigue crack propagation in NiTi shape memory alloys

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