Joseph D. Paulsen
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View article: Ordered buckling structures in a twisted crimped tube
Ordered buckling structures in a twisted crimped tube Open
When a ribbon or tube is twisted far enough it forms buckles and wrinkles. Its new geometry can be strikingly ordered or hopelessly disordered. Here we study this process in a tube with hybrid boundary conditions: one end a cylinder and th…
View article: Ordered Buckling Structures in a Twisted Crimped Tube dataset
Ordered Buckling Structures in a Twisted Crimped Tube dataset Open
This spreadsheet file contains the data that support the findings of a paper titled, 'Ordered Buckling Structures in a Twisted Crimped Tube'
View article: Controlling droplets at the tips of fibers
Controlling droplets at the tips of fibers Open
Many complex wetting behaviors of fibrous materials are rooted in the behaviors of individual droplets attached to pairs of fibers. Here, we study the splitting of a droplet held between the tips of two cylindrical fibers. We discover a sh…
View article: Shape of a Membrane on a Liquid Interface with Arbitrary Curvatures
Shape of a Membrane on a Liquid Interface with Arbitrary Curvatures Open
We study the deformation of a liquid interface with arbitrary principal curvatures by a flat circular sheet. Working first at small slopes, we determine the shape of the sheet analytically in the membrane limit, where the sheet is inextens…
View article: Controlling Droplets at the Tips of Fibers
Controlling Droplets at the Tips of Fibers Open
Many complex wetting behaviors of fibrous materials are rooted in the behaviors of individual droplets attached to pairs of fibers. Here, we study the splitting of a droplet held between the tips of two cylindrical fibers. We discover a sh…
View article: Shape-recovering liquids
Shape-recovering liquids Open
Binding particles to an interface between immiscible liquids to reduce interfacial tension underpins the emulsification and phase behaviour of composite liquid systems. Nevertheless, we found that the strong binding and two-dimensional ass…
View article: Shape-Recovering Liquids
Shape-Recovering Liquids Open
The segregation of particles to the interface between two immiscible liquids to reduce the interfacial energy is a fundamental principle that underpins emulsification and the phase behavior of a wealth of multicomponent composite systems. …
View article: Shape of a membrane on a liquid interface with arbitrary curvatures
Shape of a membrane on a liquid interface with arbitrary curvatures Open
We study the deformation of a liquid interface with arbitrary principal curvatures by a flat circular sheet. Working first at small slopes, we determine the shape of the sheet analytically in the membrane limit, where the sheet is inextens…
View article: Mechanical Memories in Solids, from Disorder to Design
Mechanical Memories in Solids, from Disorder to Design Open
Solids are rigid, which means that when left undisturbed, their structures are nearly static. It follows that these structures depend on history—but it is surprising that they hold readable memories of past events. Here, we review the rese…
View article: Twisting a Cylindrical Sheet Makes It a Tunable Locking Material
Twisting a Cylindrical Sheet Makes It a Tunable Locking Material Open
A buckled sheet offers a reservoir of material that can be unfurled at a later time. For sufficiently thin yet stiff materials, this geometric process has a striking mechanical feature: when the slack runs out, the material locks to furthe…
View article: Cross-sections of doubly curved sheets as confined elastica
Cross-sections of doubly curved sheets as confined elastica Open
Although thin films are typically manufactured in planar sheets or rolls, they are often forced into three-dimensional (3D) shapes, producing a plethora of structures across multiple length scales. To understand this complex response, prev…
View article: A wrinkled cylindrical shell as a tunable locking material
A wrinkled cylindrical shell as a tunable locking material Open
A buckled sheet offers a reservoir of material that can be unfurled at a later time. For sufficiently thin yet stiff materials, this geometric process has a striking mechanical feature: when the slack runs out, the material locks to furthe…
View article: Interplay of gross and fine structures in strongly-curved sheets
Interplay of gross and fine structures in strongly-curved sheets Open
Although thin films are typically manufactured in planar sheets or rolls, they are often forced into three-dimensional shapes, producing a plethora of structures across multiple length-scales. Existing theoretical approaches have made prog…
View article: Propagating irreversibility fronts in cyclically sheared suspensions
Propagating irreversibility fronts in cyclically sheared suspensions Open
The interface separating a liquid from its vapor phase is diffuse: the\ncomposition varies continuously from one phase to the other over a finite\nlength. Recent experiments on dynamic jamming fronts in two dimensions\n[Waitukaitis et al.,…
View article: Propagating irreversibility fronts in cyclically-sheared suspensions
Propagating irreversibility fronts in cyclically-sheared suspensions Open
The interface separating a liquid from its vapor phase is diffuse: the composition varies continuously from one phase to the other over a finite length. Recent experiments on dynamic jamming fronts in two dimensions [Waitukaitis et al., Eu…
View article: Sculpting Liquids with Ultrathin Shells
Sculpting Liquids with Ultrathin Shells Open
Thin elastic films can spontaneously attach to liquid interfaces, offering a platform for tailoring their physical, chemical, and optical properties. Current understanding of the elastocapillarity of thin films is based primarily on studie…
View article: Principles of pattern selection for confined elastic shells
Principles of pattern selection for confined elastic shells Open
Geometry-driven instabilities yield complex wrinkle patterns in thin elastic shells. Using experiments and simulations of shells confined to a liquid bath, we demonstrate the coexistence of ordered wrinkles and disordered regions whose lay…
View article: Mesoscale structure of wrinkle patterns and defect-proliferated liquid crystalline phases
Mesoscale structure of wrinkle patterns and defect-proliferated liquid crystalline phases Open
Significance Thin films readily buckle to relax compression, creating wrinkle patterns that may cover large portions of the solid. Predicting the arrangement of wrinkles in general settings is a major challenge that affects our understandi…
View article: Memory formation in matter
Memory formation in matter Open
Memory formation in matter is a theme of broad intellectual relevance; it sits at the interdisciplinary crossroads of physics, biology, chemistry, and computer science. Memory connotes the ability to encode, access, and erase signatures of…
View article: Geometric Stiffening and Softening of an Indented Floating Thin Film
Geometric Stiffening and Softening of an Indented Floating Thin Film Open
Thin sheets can exhibit nonlinear behaviors while the material response is purely linear. We separate two distinct mechanisms for geometric nonlinearities by studying the normal-force response of an indented polymer film floating on a liqu…
View article: Minimal descriptions of cyclic memory behaviors.
Minimal descriptions of cyclic memory behaviors. Open
Many materials that are out of equilibrium can learn one or more inputs that are repeatedly applied. Yet, a common framework for understanding such memory behaviors is lacking. Here we construct minimal representations of cyclic memory beh…
View article: Hyperuniformity with no fine tuning in sheared sedimenting suspensions
Hyperuniformity with no fine tuning in sheared sedimenting suspensions Open
Particle suspensions, present in many natural and industrial settings, typically contain aggregates or other microstructures that can complicate macroscopic flow behaviors and damage processing equipment. Recent work found that applying un…
View article: Hyperuniformity with no fine tuning in sheared sedimenting suspensions
Hyperuniformity with no fine tuning in sheared sedimenting suspensions Open
Particle suspensions, present in many natural and industrial settings, typically contain aggregates or other microstructures that can complicate macroscopic flow behaviors and damage processing equipment. Recent work found that applying un…
View article: Geometry-Driven Folding of a Floating Annular Sheet
Geometry-Driven Folding of a Floating Annular Sheet Open
Predicting the large-amplitude deformations of thin elastic sheets is difficult due to the complications of self contact, geometric nonlinearities, and a multitude of low-lying energy states. We study a simple two-dimensional setting where…
View article: Approximately stretched-exponential relaxation in sheared non-Brownian suspensions
Approximately stretched-exponential relaxation in sheared non-Brownian suspensions Open
Relaxation in glasses is often approximated by a stretched-exponential form: $f(t) = A \exp [-(t/\tau)^{\beta}]$. Here, we show that the relaxation in a model of sheared non-Brownian suspensions developed by Corte et al. [Nature Phys. 4, 4…
View article: Curvature-induced stiffness and the spatial variation of wavelength in wrinkled sheets
Curvature-induced stiffness and the spatial variation of wavelength in wrinkled sheets Open
Significance Thin elastic sheets buckle and wrinkle to relax compressive stresses. Wrinkling metrologies have recently been developed as noninvasive probes of mechanical environment or film properties, for instance in biological tissues or…