All Outputs (74)

Recoverable strain in amorphous materials: The role of ongoing plastic events following initial elastic recoil (2025)
Journal Article
Lockwood, H. A., & Fielding, S. M. (2025). Recoverable strain in amorphous materials: The role of ongoing plastic events following initial elastic recoil. Journal of Rheology, 69(3), 329-341. https://doi.org/10.1122/8.0000866

Recoverable strain is the strain recovered once a stress is removed from a body, in the direction opposite to that in which the stress had acted. To date, the phenomenon has been understood as being elastic in origin: polymer chains stretched in the... Read More about Recoverable strain in amorphous materials: The role of ongoing plastic events following initial elastic recoil.

Shear banding as a cause of nonmonotonic stress relaxation after flow cessation (2025)
Journal Article
Ward, V. K., & Fielding, S. M. (2025). Shear banding as a cause of nonmonotonic stress relaxation after flow cessation. Physical Review Materials, 9(2), Article L022601. https://doi.org/10.1103/PhysRevMaterials.9.L022601

Recent flow cessation experiments on soft materials have shown a counter-intuitive non-monotonic relaxation of the shear stress: following the switch-off of a steady imposed shear flow, the stress initially decays before later increasing again. By si... Read More about Shear banding as a cause of nonmonotonic stress relaxation after flow cessation.

Nonmonotonic Constitutive Curves and Shear Banding in Dry and Wet Granular Flows (2025)
Journal Article
Ness, C., & Fielding, S. M. (2025). Nonmonotonic Constitutive Curves and Shear Banding in Dry and Wet Granular Flows. Physical Review Letters, 134(3), https://doi.org/10.1103/PhysRevLett.134.038201

We use particle simulations to map comprehensively the shear rheology of dry and wet granular matter comprising particles of finite stiffness, in both fixed pressure and fixed volume protocols. At fixed pressure we find nonmonotonic constitutive curv... Read More about Nonmonotonic Constitutive Curves and Shear Banding in Dry and Wet Granular Flows.

Simple and effective mechanical cloaking (2024)
Journal Article
Fielding, S. M. (2024). Simple and effective mechanical cloaking. Journal of the Mechanics and Physics of Solids, 192, Article 105824. https://doi.org/10.1016/j.jmps.2024.105824

We show theoretically that essentially perfect elastostatic mechanical cloaking of a circular inclusion in a homogeneous surrounding medium can be achieved by means of a simple cloak comprising three concentric annuli, each formed of a homogeneous is... Read More about Simple and effective mechanical cloaking.

Reduced stress propagation leads to increased mechanical failure resistance in auxetic materials (2024)
Journal Article
Fielding, S. M. (2024). Reduced stress propagation leads to increased mechanical failure resistance in auxetic materials. Proceedings of the National Academy of Sciences, 121(21), Article e2312899121. https://doi.org/10.1073/pnas.2312899121

Materials with a negative Poisson ratio have the counterintuitive property of expanding laterally when they are stretched longitudinally. They are accordingly termed auxetic, from the Greek auxesis meaning to increase. Experimental studies have demon... Read More about Reduced stress propagation leads to increased mechanical failure resistance in auxetic materials.

Slow Fatigue and Highly Delayed Yielding via Shear Banding in Oscillatory Shear (2024)
Journal Article
Cochran, J. O., Callaghan, G. L., Caven, M. J., & Fielding, S. M. (2024). Slow Fatigue and Highly Delayed Yielding via Shear Banding in Oscillatory Shear. Physical Review Letters, 132(16), Article 168202. https://doi.org/10.1103/PhysRevLett.132.168202

We study theoretically the dynamical process of yielding in cyclically sheared amorphous materials, within a thermal elastoplastic model and the soft glassy rheology model. Within both models we find an initially slow accumulation, over many cycles a... Read More about Slow Fatigue and Highly Delayed Yielding via Shear Banding in Oscillatory Shear.

Power law creep and delayed failure of gels and fibrous materials under stress (2024)
Journal Article
Lockwood, H. A., Agar, M. H., & Fielding, S. M. (2024). Power law creep and delayed failure of gels and fibrous materials under stress. Soft Matter, 20(11), 2474-2479. https://doi.org/10.1039/d3sm01608k

Motivated by recent experiments studying the creep and breakup of a protein gel under stress, we introduce a simple mesoscopic model for the irreversible failure of gels and fibrous materials, and demonstrate it to capture much of the phenomenology s... Read More about Power law creep and delayed failure of gels and fibrous materials under stress.

Discontinuous Shear Thickening in Biological Tissue Rheology (2024)
Journal Article
Hertaeg, M. J., Fielding, S. M., & Bi, D. (2024). Discontinuous Shear Thickening in Biological Tissue Rheology. Physical Review X, 14(1), Article 011027. https://doi.org/10.1103/physrevx.14.011027

During embryonic morphogenesis, tissues undergo dramatic deformations in order to form functional organs. Similarly, in adult animals, living cells and tissues are continually subjected to forces and deformations. Therefore, the success of embryonic... Read More about Discontinuous Shear Thickening in Biological Tissue Rheology.

Constitutive model for the rheology of biological tissue (2023)
Journal Article
Fielding, S. M., Cochran, J. O., Huang, J., Bi, D., & Marchetti, M. C. (2023). Constitutive model for the rheology of biological tissue. Physical Review E, 108(4), Article L042602. https://doi.org/10.1103/PhysRevE.108.L042602

The rheology of biological tissue is key to processes such as embryo development, wound healing, and cancer metastasis. Vertex models of confluent tissue monolayers have uncovered a spontaneous liquid-solid transition tuned by cell shape; and a shear... Read More about Constitutive model for the rheology of biological tissue.

Model of Friction with Plastic Contact Nudging: Amontons-Coulomb Laws, Aging of Static Friction, and Nonmonotonic Stribeck Curves with Finite Quasistatic Limit (2023)
Journal Article
Fielding, S. M. (2023). Model of Friction with Plastic Contact Nudging: Amontons-Coulomb Laws, Aging of Static Friction, and Nonmonotonic Stribeck Curves with Finite Quasistatic Limit. Physical Review Letters, 130(17), Article 178203. https://doi.org/10.1103/physrevlett.130.178203

We introduce a model of friction between two contacting (stationary or cosliding) rough surfaces, each comprising a random ensemble of polydisperse hemispherical bumps. In the simplest version of the model, the bumps experience on contact with each o... Read More about Model of Friction with Plastic Contact Nudging: Amontons-Coulomb Laws, Aging of Static Friction, and Nonmonotonic Stribeck Curves with Finite Quasistatic Limit.

Yielding, shear banding, and brittle failure of amorphous materials (2022)
Journal Article
Pollard, J., & Fielding, S. M. (2022). Yielding, shear banding, and brittle failure of amorphous materials. Physical Review Research, 4(4), Article 043037. https://doi.org/10.1103/physrevresearch.4.043037

Widespread processes in nature and technology are governed by the dynamical transition whereby a material in an initially solid-like state, whether soft or hard, then yields. Major unresolved questions concern whether any material will yield smoothly... Read More about Yielding, shear banding, and brittle failure of amorphous materials.

Perspectives on viscoelastic flow instabilities and elastic turbulence (2022)
Journal Article
Datta, S. S., Ardekani, A. M., Arratia, P. E., Beris, A. N., Bischofberger, I., McKinley, G. H., Eggers, J. G., López-Aguilar, J. E., Fielding, S. M., Frishman, A., Graham, M. D., Guasto, J. S., Haward, S. J., Shen, A. Q., Hormozi, S., Morozov, A., Poole, R. J., Shankar, V., Shaqfeh, E. S., Stark, H., …Stone, H. A. (2022). Perspectives on viscoelastic flow instabilities and elastic turbulence. Physical Review Fluids, 7(8), Article 080701. https://doi.org/10.1103/physrevfluids.7.080701

Viscoelastic fluids are a common subclass of rheologically complex materials that are encountered in diverse fields from biology to polymer processing. Often the flows of viscoelastic fluids are unstable in situations where ordinary Newtonian fluids... Read More about Perspectives on viscoelastic flow instabilities and elastic turbulence.

Power fluctuations in sheared amorphous materials: A minimal model (2022)
Journal Article
Ekeh, T., Fodor, É., Fielding, S. M., & Cates, M. E. (2022). Power fluctuations in sheared amorphous materials: A minimal model. Physical Review E, 105(5), Article L052601. https://doi.org/10.1103/physreve.105.l052601

The importance of mesoscale fluctuations in flowing amorphous materials is widely accepted, without a clear understanding of their role. We propose a mean-field elastoplastic model that admits both stress and strain-rate fluctuations, and investigate... Read More about Power fluctuations in sheared amorphous materials: A minimal model.

Shear-Driven Solidification and Nonlinear Elasticity in Epithelial Tissues (2022)
Journal Article
Huang, J., Cochran, J. O., Fielding, S. M., Marchetti, M. C., & Bi, D. (2022). Shear-Driven Solidification and Nonlinear Elasticity in Epithelial Tissues. Physical Review Letters, 128(17), https://doi.org/10.1103/physrevlett.128.178001

Biological processes, from morphogenesis to tumor invasion, spontaneously generate shear stresses inside living tissue. The mechanisms that govern the transmission of mechanical forces in epithelia and the collective response of the tissue to bulk sh... Read More about Shear-Driven Solidification and Nonlinear Elasticity in Epithelial Tissues.

Wall slip and bulk yielding in soft particle suspensions (2021)
Journal Article
Jung, G., & Fielding, S. M. (2021). Wall slip and bulk yielding in soft particle suspensions. Journal of Rheology, 65(2), Article 199. https://doi.org/10.1122/8.0000171

We simulate a dense athermal suspension of soft particles sheared between hard walls of a prescribed roughness profile, fully accounting for the fluid mechanics of the solvent between the particles and for the solid mechanics of changes in the partic... Read More about Wall slip and bulk yielding in soft particle suspensions.

Aging in a mean field elastoplastic model of amorphous solids (2020)
Journal Article
Parley, J. T., Fielding, S. M., & Sollich, P. (2020). Aging in a mean field elastoplastic model of amorphous solids. Physics of Fluids, 32(12), Article 127104. https://doi.org/10.1063/5.0033196

We construct a mean-field elastoplastic description of the dynamics of amorphous solids under arbitrary time-dependent perturbations, building on the work of Lin and Wyart [Phys. Rev. X 6, 011005 (2016)] for steady shear. Local stresses are driven by... Read More about Aging in a mean field elastoplastic model of amorphous solids.

Ductile and Brittle Yielding in Thermal and Athermal Amorphous Materials (2020)
Journal Article
Barlow, H. J., Cochran, J. O., & Fielding, S. M. (2020). Ductile and Brittle Yielding in Thermal and Athermal Amorphous Materials. Physical Review Letters, 125(16), Article 168003. https://doi.org/10.1103/physrevlett.125.168003

We study theoretically the yielding of sheared amorphous materials as a function of increasing levels of initial sample annealing prior to shear, in three widely used constitutive models and three widely studied annealing protocols. In thermal system... Read More about Ductile and Brittle Yielding in Thermal and Athermal Amorphous Materials.

Interplay of edge fracture and shear banding in complex fluids (2020)
Journal Article
Hemingway, E. J., & Fielding, S. M. (2020). Interplay of edge fracture and shear banding in complex fluids. Journal of Rheology, 64(5), Article 1147. https://doi.org/10.1122/8.0000086

We explore theoretically the interplay between shear banding and edge fracture in complex fluids by performing a detailed simulation study within two constitutive models: the Johnson–Segalman model and the Giesekus model. We consider separately param... Read More about Interplay of edge fracture and shear banding in complex fluids.

Elastoviscoplastic rheology and aging in a simplified soft glassy constitutive model (2020)
Journal Article
Fielding, S. M. (2020). Elastoviscoplastic rheology and aging in a simplified soft glassy constitutive model. Journal of Rheology, 64(3), Article 723. https://doi.org/10.1122/1.5140465

Yield stress fluids display a rich rheological phenomenology. Beyond the defining existence of a yield stress in the steady state flow curve, this includes, in many materials, rather flat viscoelastic spectra over many decades of frequency in small a... Read More about Elastoviscoplastic rheology and aging in a simplified soft glassy constitutive model.

Slow Coarsening in Jammed Athermal Soft Particle Suspensions (2019)
Journal Article
Chacko, R., Sollich, P., & Fielding, S. (2019). Slow Coarsening in Jammed Athermal Soft Particle Suspensions. Physical Review Letters, 123(10), Article 108001. https://doi.org/10.1103/physrevlett.123.108001

We simulate a densely jammed, athermal assembly of repulsive soft particles immersed in a solvent. Starting from an initial condition corresponding to a quench from a high temperature, we find nontrivial slow dynamics driven by a gradual release of s... Read More about Slow Coarsening in Jammed Athermal Soft Particle Suspensions.