Strain localization and failure of disordered particle rafts with tunable ductility during tensile deformation

Xiao, Hongyi; Ivancic, Robert; Durian, Douglas J.

doi:10.1039/d0sm00839g

Cited by 14 publications

(15 citation statements)

References 70 publications

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“…[15][16][17] In the quasi-static regime, the ductile behavior of particle rafts shows a dependence on particle size at small strains. 18 However, the dependence of the failure morphology on the pulling speed was not examined.…”

Section: Introductionmentioning

confidence: 99%

Rifts in rafts

Khá-Î

Nagel

2023

Soft Matter

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Section: Introductionmentioning

confidence: 99%

Rifts in rafts

Khá-Î

Nagel

2023

Soft Matter

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“…Zuo et al 22 innovatively examined the particle raft's behavior in quasi-static tensile and shear experiments, revealing the formation and evolution of the cracks. In use of a similar device, Xiao et al 23 found that small-particle rafts endured notable plastic deformation via long-distance capillary interactions. Moreover, To and Nage 24 witnessed particle rafts fragmenting into dispersed clusters along expanding fluid.…”

Section: ■ Introductionmentioning

confidence: 99%

Axisymmetric Compression of a Circular Particle Raft Driven by the Diffusion of Surfactant

Yao,

Cao,

Liu

et al. 2024

Langmuir

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Particle rafts are a new kind of soft matter formed by self-organization on the interface, which possesses mechanical properties between fluid and solid, and they have been widely used in many industrial fields. In the present study, the compression experiment of a circular particle raft is first performed, where an SDS (sodium dodecyl sulfate)-coated metal ring is placed around its periphery. When the surfactant diffuses, the particle raft shrinks, and its shrinkage ratio increases with the increase in the surfactant concentration, where the experimental results are consistent with the numerical simulation. Next, the relationship between the initial surface tension difference of SDS and the radius shrinkage of the particle raft is obtained by dimensional analysis. In what follows, the diffusion model is built to quantify the diffusion process of SDS at the liquid–gas interface, and then the analytical concentration solution of the concentration of SDS at the periphery of particle raft is given. The particle raft is viewed as an elastic circular plate under the action of the radial pressure, which originates from the surface tension difference, which has been verified by the experimental result. These explorations cast a new light on how to apply loads to measure mechanical properties of soft matter, which also provide some inspirations on the design of microsensors and microfluidics.

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“…For example, compressing the raft from two of its opposing ends at small strain can induce an instability in which the particles buckle out of the plane [6][7][8]. Likewise, pulling the raft from its opposing ends quasi-statically can induce ductile deformation [9]. The underlying fluid plays a crucial role.…”

Section: Introductionmentioning

confidence: 99%

Cluster Formation and Relaxation in Particle Rafts under Uniform Radial Expansion

Khá-Î¹

2023

Preprint

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Particle rafts floating at an air-liquid interface exhibit a variety of behaviors when interfacial flow is introduced. Motivated by previous experimental observations, the failure pattern of particle rafts under uniform radial expansion is reported in this paper. The expansion process is specifically designed to expand the system affinely in the radial direction and to keep the velocity gradient constant throughout. A strong resemblance to the results of particle rafts under uniform uniaxial expansion [1] is found. The size of the cluster emerging as the rafts are pulled apart scales inversely with the pulling velocity. This is a result of two competing velocities: the inter-particle separation speed provided by the flow and a size-dependent relaxation speed for clustering. A model, generalized from a one-dimensional linear (in)stability calculation, is in agreement with the failure morphology found for this radially expanded system. Nonlinear relaxation and particle rearrangement is observed after the initial clustering occurs. This is a feature unique to a two-dimensional system. With its easily accessible particle dynamics at the microscopic level, this system provides insights into the morphology controlled by two competing mechanisms in two or higher dimensions and across different scales.

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Strain localization and failure of disordered particle rafts with tunable ductility during tensile deformation

Abstract: Quasi-static tensile experiments were performed for a model disordered solid consisting of a two-dimensional raft of polydisperse floating granular particles with capillary attractions. The ductility is tuned by controlling the...

Cited by 14 publications

References 70 publications

Rifts in rafts

Rifts in rafts

Axisymmetric Compression of a Circular Particle Raft Driven by the Diffusion of Surfactant

Cluster Formation and Relaxation in Particle Rafts under Uniform Radial Expansion

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