A phenomenological model for microstructure-dependent inelasticity in shape-memory alloys
作者： Diego Grandi , Ulisse Stefanelli
DOI: 10.1007/S11012-014-0018-7
关键词: Alloy 、 Condensed matter physics 、 Crystal 、 Microstructure 、 Shape-memory alloy 、 Crystallite 、 Phenomenological model 、 Calculus of variations 、 Materials science 、 Grain size
摘要: Degradation in shape-memory alloy response is a crucial concern for variety of innovative applications. Under cyclic loadings, these materials generally experience permanent inelastic deformations. The onset plasticization known to be very sensitive the microstructure polycrystalline specimen. Moving from recent experimental findings (Malard et al. Funct Mater Lett 2:45–54, 2009; Acta 59:1542–1556, 2011), we present phenomenological model effects alloys taking into account microstructure. In particular, mechanical under loadings investigated connection with mean crystal grain size. Formulated within variational frame generalized standard materials, consists an extension Auricchio (Int J Plast 23:207–226, 2007) case microstructure-dependent parameters. mathematical setting discussed and numerical simulations showing capability reproduce experiments are presented.
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