Insight into plasticity mechanisms in metallic glasses by means of a Brazilian test and numerical simulation

Abstract : Multiaxial and heterogeneous mechanical experiments, by means of the diametral com- pression test (Brazilian test), were carried out on Zr-based Bulk Metallic Glass. Atten- tion was notably focused on obtaining the displacement field in the area of interest (large strains) employing a Digital Image Correlation device, in addition to the measurement of the usual global load-displacement curve. In order to reproduce the behaviour of the BMG at stake, several constitutive equations were considered with growing complexity: von Mises, Drucker-Prager (pressure dependence), free volume based model as well as a viscoplastic Coulomb-Mohr type model. The two latter were implemented as user-material in a Finite Element computation code. The results of these investigations including experiments and computational simulations are discussed.
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Journal of Alloys and Compounds, Elsevier, 2014, 586, pp.S236-S241
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Jean-Sébastien Brest, Vincent Keryvin, Patrice Longère, Yoshihiko Yokoyama. Insight into plasticity mechanisms in metallic glasses by means of a Brazilian test and numerical simulation. Journal of Alloys and Compounds, Elsevier, 2014, 586, pp.S236-S241. 〈hal-00977285〉

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