Equilibrium stress during the response of shape memory alloys to an abrupt heat pulse

Shahaf Vollach; Ran Caciularu; Doron Shilo

doi:10.1016/j.scriptamat.2017.07.016

Equilibrium stress during the response of shape memory alloys to an abrupt heat pulse

Shahaf Vollach
, Ran Caciularu
, Doron Shilo

Technion - Israel Institute of Technology

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

Abstract

Previous studies of the responses of shape memory alloys (SMA) under a rapid heat pulse revealed the existence of a critical plateau stress that determines the performances of high rate SMA actuators. In this letter, we investigate the effects of temperature and initial stress on the plateau stress. Calculations based on the integration of the Clausius-Clapeyron equation while considering the inhomogeneity of the transformation temperature were in good agreement with the measured data. Our results indicate that the plateau stress represents equilibrium conditions and that actuation performances can be increased significantly by increasing the initial stress.

Original language	English
Pages (from-to)	50-53
Number of pages	4
Journal	Scripta Materialia
Volume	141
DOIs	https://doi.org/10.1016/j.scriptamat.2017.07.016
State	Published - Dec 2017

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2017.07.016

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title = "Equilibrium stress during the response of shape memory alloys to an abrupt heat pulse",

abstract = "Previous studies of the responses of shape memory alloys (SMA) under a rapid heat pulse revealed the existence of a critical plateau stress that determines the performances of high rate SMA actuators. In this letter, we investigate the effects of temperature and initial stress on the plateau stress. Calculations based on the integration of the Clausius-Clapeyron equation while considering the inhomogeneity of the transformation temperature were in good agreement with the measured data. Our results indicate that the plateau stress represents equilibrium conditions and that actuation performances can be increased significantly by increasing the initial stress.",

author = "Shahaf Vollach and Ran Caciularu and Doron Shilo",

note = "Funding Information: This research was funded by a research grant (ZH003) from General Motors Corporation ? Universal Motors Israel Technology Research and Development Ltd. The authors wish to acknowledge technical discussions with Nilesh D. Mankame and the support of Nancy L. Johnson and Jan H. Aase, all of the Smart Materials and Structures Group at General Motors Global Research and Development, Warren, Michigan, USA. Publisher Copyright: {\textcopyright} 2017 Acta Materialia Inc.",

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T1 - Equilibrium stress during the response of shape memory alloys to an abrupt heat pulse

AU - Vollach, Shahaf

AU - Caciularu, Ran

AU - Shilo, Doron

N1 - Funding Information: This research was funded by a research grant (ZH003) from General Motors Corporation ? Universal Motors Israel Technology Research and Development Ltd. The authors wish to acknowledge technical discussions with Nilesh D. Mankame and the support of Nancy L. Johnson and Jan H. Aase, all of the Smart Materials and Structures Group at General Motors Global Research and Development, Warren, Michigan, USA. Publisher Copyright: © 2017 Acta Materialia Inc.

PY - 2017/12

Y1 - 2017/12

N2 - Previous studies of the responses of shape memory alloys (SMA) under a rapid heat pulse revealed the existence of a critical plateau stress that determines the performances of high rate SMA actuators. In this letter, we investigate the effects of temperature and initial stress on the plateau stress. Calculations based on the integration of the Clausius-Clapeyron equation while considering the inhomogeneity of the transformation temperature were in good agreement with the measured data. Our results indicate that the plateau stress represents equilibrium conditions and that actuation performances can be increased significantly by increasing the initial stress.

AB - Previous studies of the responses of shape memory alloys (SMA) under a rapid heat pulse revealed the existence of a critical plateau stress that determines the performances of high rate SMA actuators. In this letter, we investigate the effects of temperature and initial stress on the plateau stress. Calculations based on the integration of the Clausius-Clapeyron equation while considering the inhomogeneity of the transformation temperature were in good agreement with the measured data. Our results indicate that the plateau stress represents equilibrium conditions and that actuation performances can be increased significantly by increasing the initial stress.

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DO - 10.1016/j.scriptamat.2017.07.016

M3 - Article

SN - 1359-6462

VL - 141

SP - 50

EP - 53

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Equilibrium stress during the response of shape memory alloys to an abrupt heat pulse

Abstract

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