Reversibility and hysteresis of the sharp yielding transition of a colloidal glass under oscillatory shear

Dang, Minh Triet; Денисов, Д. В.; Struth, Bernd; Zaccone, Alessio; Schall, Peter

doi:10.1140/epje/i2016-16044-3

Cited by 13 publications

(18 citation statements)

References 52 publications

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“…In turn, a local reversible shear transformation in a quiescent glass can trigger irreversible cage jumps whose density is large when the system dynamics is weakly damped or the shear transformation is slow [21,22]. More recently, a sharp transition from affine to nonaffine displacements of particles was identified in colloidal glasses under variable-amplitude oscillatory shear [6,7].…”

Section: Introductionmentioning

confidence: 99%

Nonaffine rearrangements of atoms in deformed and quiescent binary glasses

Priezjev

2016

Phys. Rev. E

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The influence of periodic shear deformation on nonaffine atomic displacements in an amorphous solid is examined via molecular dynamics simulations. We study the three-dimensional Kob-Andersen binary mixture model at a finite temperature. It is found that when the material is periodically strained, most of the atoms undergo repetitive nonaffine displacements with amplitudes that are broadly distributed. We show that particles with large amplitudes of nonaffine displacements are organized into compact clusters. With increasing strain amplitude, spatial correlations of nonaffine displacements become increasingly long-ranged, although they remain present even in a quiescent system due to thermal fluctuations.

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Section: Introductionmentioning

confidence: 99%

Nonaffine rearrangements of atoms in deformed and quiescent binary glasses

Priezjev

2016

Phys. Rev. E

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“…Recent results show that the number of nearest neighbors decreases exponentially with strain amplitude in large amplitude oscillatory shear experiments [19], n(γ) = (n 0 − n c ) exp(−αγ) + n c , or super-exponentially under application of a step to a constant shear rate [21]. To be consistent with previous work on large amplitude oscillatory shear, we choose here to use the exponential dependence on γ.…”

Section: Onset Of Yieldingmentioning

confidence: 93%

“…The model we use in this manuscript describes the deviation from the linear response regime and the onset of shear melting in dense fluids and glasses. It has been described in detail in recent work [19,21]. We recall here the main features and assumptions of the model.…”

Section: Phenomenological Modelmentioning

confidence: 99%

“…Due to the presence of unrelaxed stresses in the flowing glass [32,33], history effects in glass reformation might lead to a different glass state (post-yielding), with distinct mechanical properties compared to the pre-yielding solid [34]. Recent results on model glasses indicate the presence of these history effects and their connection to structural rearrangements [19].…”

Section: Introductionmentioning

confidence: 99%

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A well defined glass state obtained by oscillatory shear

Pérez-Ocampo

Zaccone

Laurati

2018

Journal of Rheology

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We investigate the process of shear melting and re-solidification of a colloidal glass, directly after loading (pre-yielding) and after a series of consecutive strain sweeps (post-yielding). The postyielding glass shows a significant softening compared to the pre-yielding glass, together with the absence of history effects in successive shear melting protocols, indicating a reproducible process of fluidisation and re-solidification into a glass state unaffected by residual stresses. However, a significant hysteresis characterises strain sweeps with increasing or decreasing strain amplitude.The appearance of history and hysteresis effects coincides with the formation of a glass state, whereas it is not observed in the liquid. We can describe the onset of shear melting over a broad range of volume fractions and frequencies using a recently developed model which describes the yielding process in terms of loss of long-lived nearest neighbours. * mlaurati@fisica.ugto.mx arXiv:1709.05570v1 [cond-mat.soft]

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“…Several papers discuss peculiar aspects of complex flowing behaviour at changing the characteristic lengthscales of the system, in particular focusing on thermal fluctuations, nanoscale heterogeneities and structural transition [1][2][3][4][5]. The discrete nature of the dispersed phase is investigated in terms of Lagrangian structures at micro/meso-scale (e.g.…”

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confidence: 99%

Topical issue on Multi-scale phenomena in complex flows and flowing matter

Lanotte

Cencini²,

Sbragaglia

et al. 2016

Eur. Phys. J. E

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New research topics related to the statistical and dynamical properties of matter flowing in simple and complex flows have emerged in the recent years at the crossroads among industrial processes, biotech applications, fundamental physics, engineering and Earth sciences. Depending on the microscopic interactions, a sample of molecules or mesoscopic particles can flow like a simple Newtonian fluid, deform elastically like a solid, or behave with a complex rheology and strong non-equilibrium properties. When the internal constituents are active, as for biological entities, complicate collective motions can be observed. Sometimes these particles undergo breakup or coalescence processes, whose occurrence strongly depends on the flow statistics.In many realistic applications, the large scale advecting flow has chaotic spatial and temporal fluctuations, sometimes over a wide range of scales/frequencies as in the case of fully developed turbulent flows. As a result, flowing matter often exhibits a tight coupling between small-scale fluctuations and large-scale flow structures, urging for a unifying view at both Lagrangian and Eulerian levels.Flows of interest can be at the nano-, micro-or macro-scales, and need different theoretical, numerical and experimental approaches. The interplay of the dynamical and other related processes taking place at the different scales remains, for many problems, elusive and challenging.This topical issue of the European Physical Journal E brings together a cross-section of research advances and activities, highlighting the diversity of basic and applied interests in flowing matter across the scales. It is the result of a widespread activity in Europe and beyond, involving communities from physics, bio-physics, mechanical engineering and applied mathematics.Several papers discuss peculiar aspects of complex flowing behaviour at changing the characteristic lengthscales of the system, in particular focusing on thermal fluctuations, nanoscale heterogeneities and structural transition [1][2][3][4][5]. The discrete nature of the dispersed phase is investigated in terms of Lagrangian structures at micro/meso-scale (e.g. colliding particles, polymers, active matter, micro-swimmers) by several authors [6][7][8][9][10][11]. Few contributions focus on classical problems related to non-linear systems or the turbulent behaviour of Newtonian fluids, but focusing on new observables or novel approaches to anomalous scaling: these include the discussion of dissipated energy in diffusive systems [12], turbulence under rotation or with strong helical properties [13][14][15][16], with waves [17], or with modified non-linear interactions [18,19].The papers in this issue showcase examples of active mutual scientific fertilization across different disciplines and approaches. Among these, the application of techniques inherited from statistical mechanics, both in analyzing largescale dynamics of chaotic systems, as well as mesoscale statistics of glass-forming liquids, but also energy-landscape analysis of mech...

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Reversibility and hysteresis of the sharp yielding transition of a colloidal glass under oscillatory shear

Cited by 13 publications

References 52 publications

Nonaffine rearrangements of atoms in deformed and quiescent binary glasses

Nonaffine rearrangements of atoms in deformed and quiescent binary glasses

A well defined glass state obtained by oscillatory shear

Topical issue on Multi-scale phenomena in complex flows and flowing matter

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