151 citations · 1.5k across the 46 of their papers we have counts for
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Investigating the Nature of Discontinuous Shear Thickening: Beyond a Mean-Field Description
Jetin E. Thomas, Abhay Goyal, Deshpreet Singh Bedi +3
Dense suspensions can undergo a dramatic increase in viscosity at a critical value of the shear stress. This phenomenon, termed discontinuous shear thickening (DST), has been attri…
Pinch-point Singularities in Stress-Stress Correlations Reveal Rigidity in Colloidal Gels
Albert Countryman, H. A. Vinutha, Fabiola Diaz Ruiz +3
We demonstrate that the spatial correlations of microscopic stresses in 2D model colloidal gels obtained in computer simulations can be quantitatively described by the predictions…
Inter-Species Interactions in Dual, Fibrous Gel Enable Control of Gel Structure and Rheology
Mauro L Mugnai, Rose Tchuenkam Batoum, Emanuela Del Gado
Natural and synthetic multi-component gels display emergent properties, which implies that they are more than just the sum of their components. This warrants the investigation of t…
Topological Data Analysis for Particulate Gels
Alexander Smith, Gavin J. Donley, Emanuela Del Gado +1
Soft gels, formed via the self-assembly of particulate organic materials, exhibit intricate multi-scale structures that provides them with flexibility and resilience when subjected…
Ductile-to-brittle transition and yielding in soft amorphous materials: perspectives and open questions
Thibaut Divoux, Elisabeth Agoritsas, Stefano Aime +37
Soft amorphous materials are viscoelastic solids ubiquitously found around us, from clays and cementitious pastes to emulsions and physical gels encountered in food or biomedical e…
Memory of shear flow in soft jammed materials
H. A. Vinutha, Manon Marchand, Marco Caggioni +3
Cessation of flow in simple yield stress fluids results in a complex stress relaxation process that depends on the preceding flow conditions and leads to finite residual stresses.…
Soft matter physics of the ground beneath our feet
Anne Voigtländer, Morgane Houssais, Karol A. Bacik +24
Inspired by presentations by the authors during a workshop organized at the Princeton Center for Theoretical Science (PCTS) in January 2022, we present a perspective on some of the…
Structural criterion for the onset of rigidity in a colloidal gel
C. S. Dias, J. C. Neves, M. M. Telo da Gama +2
Identifying the necessary conditions for the onset of rigidity in a gel remains a challenge. It has been suggested that local particle coordination could be used to establish such…
Stress-stress Correlations Reveal Force Chains in Gels
H. A. Vinutha, Fabiola Diaz Ruiz, Xiaoming Mao +2
We investigate the spatial correlations of microscopic stresses in soft particulate gels, using 2D and 3D numerical simulations. We use a recently developed theoretical framework p…
Flow induced rigidity percolation in shear thickening suspensions
Abhay Goyal, Nicos S. Martys, Emanuela Del Gado
Discontinuous shear thickening (DST) is associated with a sharp rise of a suspension's viscosity with increasing applied shear rate. A key signature of DST, highlighted in recent s…
Ion specificity of confined ion-water structuring and nanoscale surface forces in clays
Francis Dragulet, Abhay Goyal, Katerina Ioannidou +2
Ion specificity and related Hofmeister effects, ubiquitous in aqueous systems, can have spectacular consequences in hydrated clays, where ion-specific nanoscale surface forces can…
Like-charge attraction at the nanoscale: ground-state correlations and water destructuring
Ivan Palaia, Abhay Goyal, Emanuela del Gado +2
Like-charge attraction, driven by ionic correlations, challenges our understanding of electrostatics both in soft and hard matter. For two charged planar surfaces confining counter…
Ordered domains in sheared dense suspensions: the link to viscosity and the disruptive effect of friction
Abhay Goyal, Emanuela Del Gado, Scott Z Jones +1
Monodisperse suspensions of Brownian colloidal spheres crystallize at high densities, and ordering under shear has been observed at densities below the crystallization threshold. W…
Prestressed elasticity of amorphous solids
Shang Zhang, Ethan Stanifer, Vishwas Vasisht +3
Prestress in amorphous solids bears the memory of their formation, and plays a profound role in their mechanical properties, from stiffening or softening elastic moduli to shifting…
Universal scaling of shear thickening transitions
Meera Ramaswamy, Itay Griniasty, Danilo B. Liarte +6
Nearly all dense suspensions undergo dramatic and abrupt thickening transitions in their flow behaviour when sheared at high stresses. Such transitions occur when the dominant inte…
Multi-component colloidal gels: interplay between structure and mechanical proprieties
Claudia Ferreiro-Cordova, Mehdi Bouzid, Emanuela Del Gado +1
We present a detailed numerical study of multi-component colloidal gels interacting sterically and obtained by arrested phase separation. Under deformation, we found that the inter…
A computational study of transient shear banding in soft jammed solids
Vishwas V. Vasisht, Emanuela Del Gado
We have designed 3D numerical simulations of a soft spheres model, with size polidispersity and in athermal conditions, to study the transient shear banding that occurs during yiel…
Computing the linear viscoelastic properties of soft gels using an Optimally Windowed Chirp protocol
Mehdi Bouzid, Bavand Keshavarz, Michela Geri +3
We use molecular dynamics simulations of a model three-dimensional particulate gel, to investigate the linear viscoelastic response. The numerical simulations are combined with a n…
Network topology in soft gels: hardening and softening materials
Mehdi Bouzid, Emanuela Del Gado
The structural complexity of soft gels is at the origin of a versatile mechanical response that allows for large deformations, controlled elastic recovery and toughness in the same…
Emergence and persistence of flow inhomogeneities in the yielding and fluidization of dense soft solids
Vishwas V. Vasisht, Gabrielle Roberts, Emanuela Del Gado
The response to shear of the dense soft solids features a stress overshoot and a persistent shear banding before reaching a homogeneously flowing state. In 3D large scale simulatio…
Making soft solids flow: microscopic bursts and conga lines in jammed emulsions
Vishwas V. Vasisht, S. K. Dutta, Emanuela Del Gado +1
It is well known that jammed soft materials will flow if sheared above their yield stress - think mayonnaise spread on bread - but a complete microscopic description of this seemin…
Elastically driven, intermittent microscopic dynamics in soft solids
Mehdi Bouzid, Jader Colombo, Lucas Vieira Barbosa +1
Soft solids with tunable mechanical response are at the core of new material technologies, but a crucial limit for applications is their progressive aging over time, which dramatic…
Microscopic Picture of Cooperative Processes in Restructuring Gel Networks
Jader Colombo, Asaph Widmer-Cooper, Emanuela Del Gado
Colloidal gel networks are disordered elastic solids that can form even in extremely dilute particle suspensions. With interaction strengths comparable to the thermal energy, their…
Stress localization, stiffening and yielding in a model colloidal gel
Jader Colombo, Emanuela Del Gado
We use numerical simulations and an athermal quasi-static shear protocol to investigate the yielding of a model colloidal gel. Under increasing deformation, the elastic regime is f…