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Elastoplasticity Mediates Dynamical Heterogeneity Below the Mode-Coupling Temperature
Rahul N. Chacko, François P. Landes, Giulio Biroli +3
As liquids approach the glass transition temperature, dynamical heterogeneity emerges as a crucial universal feature of their behavior. Dynamic facilitation, where local motion tri…
Correlation of plastic events with local structure in jammed packings across spatial dimensions
Sean A. Ridout, Jason W. Rocks, Andrea J. Liu
In jammed packings, it is usually thought that local structure only plays a significant role in specific regimes. The standard deviation of the relative excess coordination, $σ_Z/…
Supervised learning in physical networks: From machine learning to learning machines
Menachem Stern, Daniel Hexner, Jason W. Rocks +1
Materials and machines are often designed with particular goals in mind, so that they exhibit desired responses to given forces or constraints. Here we explore an alternative appro…
Learning-based approach to plasticity in athermal sheared amorphous packings: Improving softness
Jason W. Rocks, Sean A. Ridout, Andrea J. Liu
The plasticity of amorphous solids undergoing shear is characterized by quasi-localized rearrangements of particles. While many models of plasticity exist, the precise relationship…
Interplay of rearrangements, strain, and local structure during avalanche propagation
Ge Zhang, Sean Ridout, Andrea J. Liu
Jammed soft disks exhibit avalanches of particle rearrangements under quasistatic shear. We follow the avalanches using steepest descent to decompose them into individual localized…
Unifying framework for strong and fragile liquids via machine learning: a study of liquid silica
Ekin D. Cubuk, Andrea J. Liu, Efthimios Kaxiras +1
The fragility of a glassforming liquid characterizes how rapidly its relaxation dynamics slow down with cooling. The viscosity of strong liquids follows an Arrhenius law with a tem…
Quantifying the link between local structure and cellular rearrangements using information in models of biological tissues
Indrajit Tah, Tristan A. Sharp, Andrea J. Liu +1
Machine learning techniques have been used to quantify the relationship between local structural features and variations in local dynamical activity in disordered glass-forming mat…
The hidden topological structure of flow network functionality
Jason W. Rocks, Andrea J. Liu, Eleni Katifori
The ability to reroute and control flow is vital to the function of venation networks across a wide range of organisms. By modifying individual edges in these networks, either by a…
Periodic training of creeping solids
Daniel Hexner, Andrea J. Liu, Sidney R. Nagel
We consider disordered solids in which the microscopic elements can deform plastically in response to stresses on them. We show that by driving the system periodically, this plasti…
Effect of aging on the non-linear elasticity and memory formation in materials
Daniel Hexner, Nidhi Pashine, Andrea J. Liu +1
Disordered solids often change their elastic response as they slowly age. Using experiments and simulations, we study how aging disordered planar networks under an applied stress a…
Directed aging, memory and Nature's greed
Nidhi Pashine, Daniel Hexner, Andrea J. Liu +1
Disordered materials are often out of equilibrium and evolve very slowly. This allows a memory of the imposed strains or preparation conditions to be encoded in the material. Here…
Tuning and jamming reduced to their minima
Miguel Ruiz-Garcia, Andrea J. Liu, Eleni Katifori
Inspired by protein folding, we introduce funnels into the complex cost function landscapes of two processes, the tuning of networks, and the jamming of ideal spheres. In both proc…
Machine Learning Characterization of Structural Defects in Amorphous Packings of Dimers and Ellipses
Matt Harrington, Andrea J. Liu, Douglas J. Durian
Structural defects within amorphous packings of symmetric particles can be characterized using a machine learning approach that incorporates structure functions of radial distances…
The limits of multifunctionality in tunable networks
Jason W. Rocks, Henrik Ronellenfitsch, Andrea J. Liu +2
Nature is rife with networks that are functionally optimized to propagate inputs in order to perform specific tasks. Whether via genetic evolution or dynamic adaptation, many netwo…
Auxetic metamaterials from disordered networks
Daniel R Reid, Nidhi Pashine, Justin M Wozniak +4
Recent theoretical work suggests that systematic pruning of disordered networks consisting of nodes connected by springs can lead to materials that exhibit a host of unusual mechan…
Two diverging length scales in the structure of jammed packings
Daniel Hexner, Andrea J. Liu, Sidney R. Nagel
At densities higher than the jamming transition for athermal, frictionless repulsive spheres we find two distinct length scales, both of which diverge as a power law as the transit…
Role of local response in manipulating the elastic properties of disordered solids by bond removal
Daniel Hexner, Andrea J. Liu, Sidney R. Nagel
We explore the range over which the elasticity of disordered spring networks can be manipulated by the removal of selected bonds. By taking into account the local response of a bon…
Linking microscopic and macroscopic response in disordered solids
Daniel Hexner, Andrea J. Liu, Sidney R. Nagel
The modulus of a rigid network of harmonic springs depends on the sum of the energies in each of the bonds due to the applied distortion: compression in the case of the bulk modulu…
Period proliferation in periodic states in cyclically sheared jammed solids
Maxim O. Lavrentovich, Andrea J. Liu, Sidney R. Nagel
Athermal disordered systems can exhibit a remarkable response to an applied oscillatory shear: after a relatively few shearing cycles, the system falls into a configuration that ha…
Disconnecting structure and dynamics in glassy thin films
Daniel M. Sussman, Samuel S. Schoenholz, Ekin D. Cubuk +1
Nanometrically thin glassy films depart strikingly from the behavior of their bulk counterparts. We investigate whether the dynamical differences between bulk and thin film glasses…
Emergent SO(3) Symmetry of the Frictionless Shear Jamming Transition
Marco Baity-Jesi, Carl P. Goodrich, Andrea J. Liu +2
We study the shear jamming of athermal frictionless soft spheres, and find that in the thermodynamic limit, a shear-jammed state exists with different elastic properties from the i…
Designing allostery-inspired response in mechanical networks
Jason W. Rocks, Nidhi Pashine, Irmgard Bischofberger +3
Recent advances in designing meta-materials have demonstrated that global mechanical properties of disordered spring networks can be tuned by selectively modifying only a small sub…
The Relationship Between Local Structure and Relaxation in Out-of-Equilibrium Glassy Systems
Samuel S. Schoenholz, Ekin D. Cubuk, Efthimios Kaxiras +1
The dynamical glass transition is typically taken to be the temperature at which a glassy liquid is no longer able to equilibrate on experimental timescales. Consequently, the phys…
Spatial structure of states of self stress in jammed systems
Daniel M. Sussman, Carl P. Goodrich, Andrea J. Liu
States of self stress, organizations of internal forces in many-body systems that are in equilibrium with an absence of external forces, can be thought of as the constitutive build…