Jamming, Force Chains, and Fragile Matter

Cates, Michael E.; Wittmer, J. P.; Bouchaud, Jean‐Philippe; Claudin, Philippe

doi:10.1103/physrevlett.81.1841

Cited by 970 publications

(888 citation statements)

References 27 publications

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“…The jamming phase diagram provides a unified picture for the ergodic-nonergodic transition in systems as diverse as molecular glasses, foams, granular matter and colloidal suspensions [22]. If a system arrests as soon as it is able to support an external load, such that it responds elastically to some compatible loads while undergoing plastic rearrangments under incompatible loads, it is classified as 'fragile' [36,37,38]. Jamming of fragile matter leads to slow dynamics because of the kinetic constraints it imposes on the motion of the individual constituents.…”

Section: The Jamming Phase Diagram and The Compressed Exponential Dynmentioning

confidence: 99%

Slow dynamics, aging, and glassy rheology in soft and living matter

Bandyopadhyay

Liang

Harden

et al. 2006

Solid State Communications

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We explore the origins of slow dynamics, aging and glassy rheology in soft and living matter. Non-diffusive slow dynamics and aging in materials characterised by crowding of the constituents can be explained in terms of structural rearrangement or remodelling events that occur within the jammed state. In this context, we introduce the jamming phase diagram proposed by Liu and Nagel to understand the ergodic-nonergodic transition in these systems, and discuss recent theoretical attempts to explain the unusual, faster-than-exponential dynamical structure factors observed in jammed soft materials. We next focus on the anomalous rheology (flow and deformation behaviour) ubiquitous in soft matter characterised by metastability and structural disorder, and refer to the Soft Glassy Rheology (SGR) model that quantifies the mechanical response of these systems and predicts aging under suitable conditions. As part of a survey of experimental work related to these issues, we present x-ray photon correlation spectroscopy (XPCS) results of the aging of laponite clay suspensions following rejuvenation. We conclude by exploring the scientific literature for recent theoretical advances in the understanding of these models and for experimental investigations aimed at testing their predictions.

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Section: The Jamming Phase Diagram and The Compressed Exponential Dynmentioning

confidence: 99%

Slow dynamics, aging, and glassy rheology in soft and living matter

Bandyopadhyay

Liang

Harden

et al. 2006

Solid State Communications

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“…However, there are similarities in particle shape, with the exception of PS. The physical characteristics are important, as it has been reported that particles within a sample are close to a fragility limit prior to loading [22]. This means that the application of any loading, including ultrasonic vibrations, can instantaneously and significantly change the properties of the sample, and influence the force chains.…”

Section: Geological Materials Characterisationmentioning

confidence: 99%

“…This means that the application of any loading, including ultrasonic vibrations, can instantaneously and significantly change the properties of the sample, and influence the force chains. In the first stage of the compaction process, a reorientation of the particles takes place, and so particle shape is not specified to be as critical [22].…”

Section: Geological Materials Characterisationmentioning

confidence: 99%

“…It has been reported that only a marginal change in the direction of applied force can cause instability such that new force chains are formed [22]. As such, the particle dimensions are one set of parameters critical to the stability of the granular materials under compression, and therefore critical to the compaction performance.…”

Section: Geological Materials Characterisationmentioning

confidence: 99%

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Ultrasonic compaction of granular geological materials

et al. 2017

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It has been shown that the compaction of granular materials for applications such as pharmaceutical tableting and plastic moulding can be enhanced by ultrasonic vibration of the compaction die. Ultrasonic vibrations can reduce the compaction pressure and increase particle fusion, leading to higher strength products. In this paper, the potential benefits of ultrasonics in the compaction of geological granular materials in downhole applications are explored, to gain insight into the effects of ultrasonic vibrations on compaction of different materials commonly encountered in sub-sea drilling. Ultrasonic vibrations are applied, using a resonant 20kHz compactor, to the compaction of loose sand and drill waste cuttings derived from oolitic limestone, clean quartz sandstone, and slate-phyllite. For each material, a higher strain for a given compaction pressure was achieved, with higher sample density compared to that in the case of an absence of ultrasonics. The relationships between the operational parameters of ultrasonic vibration amplitude and true strain rate are explored and shown to be dependent on the physical characteristics of the compacting materials.

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“…It is general knowledge now, that ensuing force chains follow certain preferential channels through the bulk collection of material (percolation sites). The distribution of these load bearing chains results in dormant regions that do not contribute to the overall force transmission and have been aptly termed as "spectators" [22]. The locations of these chains are not predictable in nature, and can be altered by agitation.…”

Section: Introductionmentioning

confidence: 99%

Effect of lubrication on the distribution of force between spherical agglomerates during compression

2010

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PostprintThis is the accepted version of a paper published in Powder Technology. This paper has been peerreviewed but does not include the final publisher proof-corrections or journal pagination.Citation for the original published paper (version of record):Mahmoodi, F., Alderborn, G., Frenning, G. (2010) Effect of lubrication on the distribution of force between spherical agglomerates during compression.Powder Technology, 198 (1) We employ the carbon paper technique to aid understanding of in die force and spatial distributions, upon compression of approximately 1 mm sized spherical agglomerates (pellets) of microcrystalline cellulose (MCC). The aim in this study was to test for the effect of lubricant film on force and spatial distributions. Pellets of MCC were formed via granulation and extrusion/spheronisation. Investigation of pellet bed compression was performed on a materials tester. Prior to compression studies the pellets were characterised for bulk density, size and deformability. Two pellet types were investigated; MCC and MCC lubricated with magnesium stearate. The carbon paper technique relies upon carbon paper as the medium for transferring imprints from compressed pellets onto photo quality paper. The digitised images of these imprints form the basis of analysis through the use of image processing software. Using the carbon paper technique within the range of 10-30 MPa indicates that lubrication does not have a significant effect on the distribution of forces between spherical agglomerates during uniaxial compression. 2 Spatial analysis of the imprints revealed that the lubricated pellets exhibited a higher packing order than the unlubricated ones at low applied pressures (10 and 20 MPa), a difference that could not be observed at 30 MPa. Hence interparticle friction and/or cohesion appear to influence the initial particle rearrangement, whereas confinement is suggested to dominate at higher pressures.

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Jamming, Force Chains, and Fragile Matter

Cited by 970 publications

References 27 publications

Slow dynamics, aging, and glassy rheology in soft and living matter

Slow dynamics, aging, and glassy rheology in soft and living matter

Ultrasonic compaction of granular geological materials

Effect of lubrication on the distribution of force between spherical agglomerates during compression

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