Variables internes et saut de vitesse en rhéologie

Abstract : The internal variables allow the description of most types of rheological behaviours by indicating wich variables must appear in the dissipation potential. The principal aim of this work is to identify the relative roles played by a scalar as a unique internal variable. The behaviour in this case is represented by the following constitutive law : ? = ?(?,? )? + ?(?, ?) due to Sokolovskii and Malvern, wich povides a valid approximation, an extremely simple and realistic model. Simple tension tests with discontinuous rates on polyethylene, polypropylene, cooper, zinc and shape memory alloy have been conducted. Based on this experiments, we determine these constitutive functions
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Salim Belouettar. Variables internes et saut de vitesse en rhéologie. Autre. Université Paul Verlaine - Metz, 1997. Français. ⟨NNT : 1997METZ059S⟩. ⟨tel-01777236⟩

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