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Internal stresses in steel plate generated by shape memory alloy inserts

Malard, Benoît and Pilch, Jan and Sittner, Petr and Davydov, Vadim and Sedlák, Petr and Konstantinidis, K. and Hughes, Darren J. Internal stresses in steel plate generated by shape memory alloy inserts. (2012) Acta Materialia, 60 (3). 1378-1394. ISSN 1359-6454

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Official URL: http://dx.doi.org/10.1016/j.actamat.2011.10.024

Abstract

Neutron strain scanning was employed to investigate the internal stress fields in steel plate coupons with embedded prestrained superelastic NiTi shape memory alloy inserts. Strain fields in steel were evaluated at T = 21 °C and 130 °C on virgin coupons as well as on mechanically and thermally fatigued coupons. Internal stress fields were evaluated by direct calculation of principal stress components from the experimentally measured lattice strains as well as by employing an inverse finite element modeling approach. It is shown that if the NiTi inserts are embedded into the elastic steel matrix following a carefully designed technological procedure, the internal stress fields vary with temperature in a reproducible and predictable way. It is estimated that this mechanism of internal stress generation can be safely applied in the temperature range from -20 °C to 150 °C and is relatively resistant to thermal and mechanical fatigue. The predictability and fatigue endurance of the mechanism are of essential importance for the development of future smart metal matrix composites or smart structures with embedded shape memory alloy components.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF can be found at Acta Materialia website: http://www.sciencedirect.com/science/article/pii/S1359645411007294
HAL Id:hal-00864841
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > Academy of Sciences (CZECH REPUBLIC)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Institut Laue-Langevin - ILL (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Other partners > Institut Paul Scherrer - PSI (SWITZERLAND)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > University of Warwick (UNITED KINGDOM)
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Deposited By: cirimat webmestre
Deposited On:23 Sep 2013 11:23

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