Bauschinger effect in model glasses

ORAL

Abstract

Once a material has experienced a significant plastic deformation, it it generally exhibits a softer stress response under reverse loading than under reloading in the original direction. The origin of this so-called Bauschinger effect, observable in various classes of materials remains poorly understood. We present here recent results obtained on two-dimensional model glasses at atomistic and mesoscopic scales. Using a numerical method developed in [1] we perform measurements of the local plastic thresholds in the steady state flow of a 2D model glasses under athermal quasi-static (AQS) deformation. Our results show evidence for the development of a forward-reverse asymmetry of the distribution of the residual strengths that can be directly connected with the Bauschinger effect [2].

[1] S. Patinet, D. Vandembroucq and M.L. Falk, Connecting Local Yield Stresses with Plastic Activity in Amorphous Solids, Phys. Rev. Lett. 117, 045501 (2016)
[2] S. Patinet et al., On the Origin of the Bauschinger Effect in Amorphous Solids arXiv:cond-mat/1906.09818 (2019)

*M.L. and S.P. acknowledge the support of French National Research Agency through the JCJC project PAMPAS under grant ANR-17-CE30-0019-01.

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Presenters

  • Damien Vandembroucq

    • PMMH, ESPCI Paris
    • PMMH, CNRS UMR 7636, ESPCI Paris, PSL University, Sorbonne Université, Université de Paris, F-75005 Paris, France
    • espci Paris

Authors

  • Sylvain Patinet

    • PMMH, ESPCI Paris
    • Physique de Mécanique des Milieux Hétérogènes laboratory
    • PMMH, CNRS UMR 7636, ESPCI Paris, PSL University, Sorbonne Université, Université de Paris, F-75005 Paris, France
    • espci Paris

  • Armand Barbot

    • PMMH, ESPCI Paris
    • PMMH, CNRS UMR 7636, ESPCI Paris, PSL University, Sorbonne Université, Université de Paris, F-75005 Paris, France

  • Ismail El Korde

    • PMMH, ESPCI Paris

  • Matthias Lerbinger

    • PMMH, ESPCI Paris
    • PMMH, CNRS UMR 7636, ESPCI Paris, PSL University, Sorbonne Université, Université de Paris, F-75005 Paris, France

  • Damien Vandembroucq

    • PMMH, ESPCI Paris
    • PMMH, CNRS UMR 7636, ESPCI Paris, PSL University, Sorbonne Université, Université de Paris, F-75005 Paris, France
    • espci Paris

  • Anaël Lemaître

    • Laboratoire Navier, IFSTTAR
    • Université Paris-Est, Laboratoire Navier (UMR 8205), CNRS, ENPC, IFSTTAR, 2 allée Képler, F-77420 Marne-la-Vallée, France