2007/05/07 by Anaël Lemaı̂tre, Anaël Lemaître, C. Caroli +1 · 2 citations
Chemistry · Engineering · Materials Science · Mathematics · Physics and Astronomy · #Amorphous metal #Amorphous solid #Chemistry #Classical mechanics #Composite material #Condensed matter physics #Crystallography #Displacement field #Dissipative system #Geometry #Material Dynamics and Properties #Materials science #Mathematics #Mechanics #Metallic Glasses and Amorphous Alloys #Phenomenology (philosophy) #Physics #Plasticity #Quasistatic process #Shear (geology) #Shear matrix #Statistical physics #Tangent #Theoretical and Computational Physics #Thermodynamics #cond-mat.dis-nn #cond-mat.stat-mech
paper · pdf · doi:10.1103/physreve.76.036104
arxiv created 2007/05/07 · openalex publication_date 2007/09/10 · arxiv updated 2016/03/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We perform extensive simulations of a two-dimensional Lennard-Jones glass subjected to quasistatic shear deformation at T=0. We analyze the distribution of nonaffine displacements in terms of contributions of plastic, irreversible events, and elastic, reversible motions. From this, we extract information about correlations between plastic events and about the elastic nonaffine noise. Moreover, we find that nonaffine motion is essentially diffusive, with a clearly size-dependent diffusion constant. These results, supplemented by close inspection of the evolving patterns of the nonaffine tangent displacement field, lead us to propose a phenomenology of plasticity in such amorphous media. It can be schematized in terms of elastic loading and irreversible flips of small, randomly located shear transformation zones, elastically coupled via their quadrupolar fields.