Elastic leak of a seal

Liu, Qihan; Wang, Zhengjin; Lou, Yucun; Suo, Zhigang

doi:10.1016/j.eml.2014.10.001

Cited by 34 publications

(33 citation statements)

References 18 publications

(22 reference statements)

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“…However, our analysis suggests that stress in a layer of glue under tension tends to be very high at the perimeter of the glue, and that this leads to a fingering instability at the perimeter. Fingering is also a failure mode for elastic seals when they are invaded by the fluid they are intended to contain, generating a leak 13 . We speculate that there is a third category of failure modes for glued joints initiated at the perimeter of the glued layer by elastic fingering.…”

Section: Discussionmentioning

confidence: 99%

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Meniscus instabilities in thin elastic layers

Biggins

Mahadevan

2018

Soft Matter

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We consider meniscus instabilities in thin elastic layers perfectly adhered to, and confined between, much stiffer bodies. When the free boundary associated with the meniscus of the elastic layer recedes into the layer, for example by pulling the stiffer bodies apart or injecting air between them, then the meniscus will eventually undergo a purely elastic instability in which fingers of air invade the layer. Here we show that the form of this instability is identical in a range of different loading conditions, provided only that the thickness of the meniscus, a, is small compared to the in-plane dimensions and to two emergent in-plane length scales that arise if the substrate is soft or if the layer is compressible. In all such situations, we predict that the instability will occur when the meniscus has receded by approximately 1.27a, and that the instability will have wavelength λ ≈ 2.75a. We illustrate this by also calculating the threshold for fingering in a thin wedge of elastic material bonded to two rigid plates that are pried apart, and the threshold for fingering when a flexible plate is peeled from an elastic layer that glues the plate to a rigid substrate.

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Section: Discussionmentioning

confidence: 99%

“…Elastic layers adhered to rigid bodies arise naturally whenever a soft polymeric glue is used, or when a rubber gasket forms a seal 13 . When fingers of air penetrate such an elastic layer, the peak strain in the elastic layer increases considerably.…”

Section: Introductionmentioning

confidence: 99%

Meniscus instabilities in thin elastic layers

Biggins

Mahadevan

2018

Soft Matter

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“…The comparison of blow-off pressure obtained with CEL techniques (2.15 kPa) with the one obtained by PPL techniques (2.05 kPa) gives just a 5% difference, which can be considered as a good proof of simulation results accuracy. After all it is also possible to validate CEL technique experimentally by simulating the available experimental studies on practical leakage pressure identification such as the one by Liu et al [23] that will be in focus for future work.…”

Section: Discussionmentioning

confidence: 99%

Application of the CEL Approach to Consider FSI for the Assessment of Leak Tightness for Elastomeric Seals

Gorash

Bickley²,

Gozalo³

2018

Volume 4: Fluid-Structure Interaction

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Swellable elastomeric seal is a type of specifically engineered packer that swell upon contact with wellbore fluids. Assessment of leakage tightness is a fundamental aspect in the design of swellable packers, since they should guarantee a reliable sealing under extreme pressures of the downhole fluids. Numerical capability of the leakage pressure prediction would facilitate improvement in the packer design methodology. Previous work was focused on investigation of the non-parametric optimisation capability seeking for an optimal external shape with a goal to maximise the grip of a packer with a borehole. The verification of an optimised design was done with a dynamic FE-simulation of packer’s failure by extrusion under an excessive pressure. The downside of that verification analysis was that Abaqus/Explicit solver couldn’t implement a realistic adaptive pressure application due to changing packer disposition and contact conditions. This simulation challenge is addressed in this paper by application of the Coupled Eulerian-Lagrangian (CEL) approach in Abaqus/Explicit, which provides the ability to simulate a class of problems where the fluid-structure interaction is important.

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“…A second potential application concerns the transduction between light and other stimuli. Many soft materials deform in response to stimuli such as stress [53][54][55], electric field [26,51], acidity and humidity [27][28][29]52]. …”

Section: Discussionmentioning

confidence: 99%

“…Deformation links many stimuli to many functions. Thus, the deformation of a dielectric elastomer links a voltage to a force [26], the deformation of a hydrogel links a change in acidity in a solution to a change in the focal length of a lens [27], the swelling of an elastomer seals an oil well for hydraulic fracture [28,29], and the deformation of a gel and an elastomer enables ionic music and ionic skin [30,31]. Soft materials can be fabricated with feature sizes as small as several micrometers [32][33][34][35] and moduli as low as ~00Pa 1 [35][36][37].…”

Section: Introductionmentioning

confidence: 99%