Dynamic Compressive Strength and Failure of Natural Lake Ice Under Moderate Strain Rates at Near Melting Point Temperature

Qi, Chunfeng; Lian, Jijian; Ouyang, Qunan; Zhao, Xin

doi:10.1590/1679-78253907

Cited by 11 publications

(4 citation statements)

References 26 publications

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“…We propose that small impactors, which melt surface ice upon impact, could seal off these nozzles and arrest the lifetimes of any resulting plumes. While the surface pressure of the vents is ∼ 1 kPa, thin sheets of ice fail at pressures of 1 Mpa (Zhang et al 2012;Wu & Prakash 2015;Qi et al 2017), making them effective at sealing off nozzles once formed.…”

Section: Impact Resurfacingmentioning

confidence: 99%

Repeated Impact-Driven Plume Formation On Enceladus Over Megayear Timescales

Siraj,

Loeb

2020

Preprint

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Water plumes erupting from the 'tiger stripe' features on the south pole of Enceladus are thought to connect to a global subsurface ocean. Proposed origins for the initial stress necessary to form the 'tiger stripes' include a giant impact, which would require true polar wander, or tensile stresses, which would require a partial freezing of the subsurface ocean. A further issue with these hypotheses is that the 'tiger stripes' may be short-lived. We show here that impact resurfacing can seal off plumes and mass loss can lead to their compression and closure over ∼ 1 Myr. Since plumes are observed at present, a mechanism by which new plumes can be generated every ∼ 1 Myr and by which such plumes are most likely to form at the south pole is needed. We propose and investigate the possibility that impacts constitute a adequate repeating source for the continual instigation of fractures and plumes. We find that the rate of impacts on Enceladus suggests the formation of ∼ 10 3 independent plume systems per Gyr, the vast majority on the south pole, and is consistent with the Cassini-derived age of the south pole for a lunar-like bombardment history, our estimates of fracture lifetimes, and with the needed parameters for parallel fracture propagation. The model favors a bombardment history similar to that of Triton over one more similar to that of the Galilean satellites, and favors a cumulative power-law index of 4.2 for impactors with radius, 1 km < R < 10 km.

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Section: Impact Resurfacingmentioning

confidence: 99%

Repeated Impact-Driven Plume Formation On Enceladus Over Megayear Timescales

Siraj,

Loeb

2020

Preprint

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“…[2] значительное внимание уделено не только физико-механическим характеристикам льда, но и новым вопросам использования ледяного покрова и особенностям его работы под временной подвижной нагрузкой. В работе [3] анализировалась прочность на сжатие образцов в виде кубов из озерного льда при изменении скоростей нагружения, а также влияние мелких дефектов на прочностные характеристики. Вопросам численного моделирования разрушения ледяного покрова с помощью специальных способов создания нагружающего воздействия при учете сжимаемости и неоднородности льда посвящена статья Прокудина А.Н.…”

Section: Introductionunclassified

Study of the influence of surface reinforcement on the bearing capacity of ice

Ipatov¹,

Vasilyev²,

Zemlyak³

2019

Comp. Contin. Mech.

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“…The mechanical characteristics of ice have become the focus of substantial research efforts over the past decades. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] Most of these have been experimental in character, focusing mainly on the phenomenological aspects of the deformation behaviors. Much less is known, however, about the molecularscale processes that underlie these behaviors.…”

Section: Introductionmentioning

confidence: 99%

Uniaxial-deformation behavior of ice Ih as described by the TIP4P/Ice and mW water models

Koning

Ruestes

Koning

2018

The Journal of Chemical Physics

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Using molecular dynamics simulations, we assess the uniaxial deformation response of ice I h as described by two popular water models, namely, the all-atom TIP4P/Ice potential and the coarsegrained mW model. In particular, we investigate the response to both tensile and compressive uniaxial deformations along the [0001] and [0110] crystallographic directions for a series of different temperatures. We classify the respective failure mechanisms and assess their sensitivity to strain rate and cell size. While the TIP4P/Ice model fails by either brittle cleavage under tension at low temperatures or large-scale amorphization/melting, the mW potential behaves in a much more ductile manner, displaying numerous cases in which stress relief involves the nucleation and subsequent activity of lattice dislocations. Indeed, the fact that mW behaves in such a malleable manner even at strain rates that are substantially higher than those applied in typical experiments indicates that the mW description of ice I h is excessively ductile. One possible contribution to this enhanced malleability is the absence of explicit protons in the mW model, disregarding the fundamental asymmetry of the hydrogen bond that plays an important role in the nucleation and motion of lattice dislocations in ice I h .

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Dynamic Compressive Strength and Failure of Natural Lake Ice Under Moderate Strain Rates at Near Melting Point Temperature

Cited by 11 publications

References 26 publications

Repeated Impact-Driven Plume Formation On Enceladus Over Megayear Timescales

Repeated Impact-Driven Plume Formation On Enceladus Over Megayear Timescales

Study of the influence of surface reinforcement on the bearing capacity of ice

Uniaxial-deformation behavior of ice Ih as described by the TIP4P/Ice and mW water models

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