Direct numerical determination of the asymptotic cyclic behavior of pseudoelastic shape memory structures / Claire Morin in Journal of engineering mechanics, Vol. 137 N° 7 (Juillet 2011)  

Public ISBD [article]  inJournal of engineering mechanics > Vol. 137 N° 7 (Juillet 2011) . - pp.497-503 Titre : Direct numerical determination of the asymptotic cyclic behavior of pseudoelastic shape memory structures Type de document : texte imprimé Auteurs : Claire Morin, Auteur ; Ziad Moumni, Auteur ; Wael Zaki, Auteur Année de publication : 2011 Article en page(s) : pp.497-503 Note générale : Mécanique appliquée Langues : Anglais (eng) Mots-clés : Shape memory alloys Cyclic behavior Direct cyclic method Numerical analysis Résumé : The design of shape memory alloys (SMAs) structures against fatigue requires the computation of the stabilized mechanical state. The classical computation method, based on a plasticity-like algorithm, requires a step-by-step calculation, leading to prohibitive computation time to reach this stabilized state. To overcome this issue, we propose to extend the direct cyclic method (DCM), for elastoplastic structures, for use with the Zaki-Moumni (ZM) model for SMAs. DCM is a large time increment method in which a periodicity condition is enforced on the state variables. Comparison with the classical incremental approach shows considerable reduction in computation time. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v137/i7/p497_s1?isAuthorized=no [article] Direct numerical determination of the asymptotic cyclic behavior of pseudoelastic shape memory structures [texte imprimé] / Claire Morin, Auteur ; Ziad Moumni, Auteur ; Wael Zaki, Auteur . - 2011 . - pp.497-503. Mécanique appliquée Langues : Anglais (eng) in Journal of engineering mechanics > Vol. 137 N° 7 (Juillet 2011) . - pp.497-503 Mots-clés : Shape memory alloys Cyclic behavior Direct cyclic method Numerical analysis Résumé : The design of shape memory alloys (SMAs) structures against fatigue requires the computation of the stabilized mechanical state. The classical computation method, based on a plasticity-like algorithm, requires a step-by-step calculation, leading to prohibitive computation time to reach this stabilized state. To overcome this issue, we propose to extend the direct cyclic method (DCM), for elastoplastic structures, for use with the Zaki-Moumni (ZM) model for SMAs. DCM is a large time increment method in which a periodicity condition is enforced on the state variables. Comparison with the classical incremental approach shows considerable reduction in computation time. DEWEY : 620.1 ISSN : 0733-9399 En ligne : http://ascelibrary.org/emo/resource/1/jenmdt/v137/i7/p497_s1?isAuthorized=no

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