Out-of-plane failure of an ice floe: Radial-crack-initiation-controlled fracture

Lü, Wenjun; Lubbad, Raed; Løset, Sveinung

doi:10.1016/j.coldregions.2015.08.009

Cited by 54 publications

(32 citation statements)

References 27 publications

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“…4 and 5). This problem was first introduced by Lu et al [28] to simulate displacement distribution for a finite size ice floe interacting with sloping structures.…”

Section: Mindlin Plate Rested On a Winkler Foundation Subjected To Trmentioning

confidence: 99%

Peridynamic Model for a Mindlin Plate Resting on a Winkler Elastic Foundation

Važić

Öterkuş

Oterkus

2020

J Peridyn Nonlocal Model

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In this study, a peridynamic model is presented for a Mindlin plate resting on a Winkler elastic foundation. In order to achieve static and quasi-static loading conditions, direct solution of the peridynamic equations is utilised by directly assigning inertia terms to zero rather than using widely adapted adaptive dynamic relaxation approach. The formulation is verified by comparing against a finite element solution for transverse loading condition without considering damage and comparing against a previous study for pure bending of a Mindlin plate with a central crack made of polymethyl methacrylate material having negligibly small elastic foundation stiffness. Finally, the fracture behaviour of a precracked Mindlin plate rested on a Winkler foundation subjected to transverse loading representing a floating ice floe interacting with sloping structures. Similar fracture patterns observed in field observations were successfully captured by peridynamics.

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“…4 and 5). This problem was first introduced by Lu et al [28] to simulate displacement distribution for a finite size ice floe interacting with sloping structures.…”

Section: Mindlin Plate Rested On a Winkler Foundation Subjected To Trmentioning

confidence: 99%

Peridynamic Model for a Mindlin Plate Resting on a Winkler Elastic Foundation

Važić

Öterkuş

Oterkus

2020

J Peridyn Nonlocal Model

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“…Later, the method was expanded with a number of closed-form solutions that cover other failure modes such as splitting and radial cracking of ice. These solutions are published in a series of papers (Lu et al, 2015a;Lu et al, 2015b;Lu et al, 2016).…”

Section: Sams Descriptionmentioning

confidence: 99%

“…Despite the common vision of creating a numerical simulator for calculating ice actions and action effects on Arctic structures, the development of each module was carried out almost independently from the other modules. At that stage, many attempts were also made to validate each module against available full-scale and lab-scale data (Lu et al, 2015a;Lu et al, 2015b;Lu et al, 2016c, Tsarau andTsarau et al, 2014).…”

Section: Sams Validationmentioning

confidence: 99%

Simulator for Arctic Marine Structures (SAMS)

Lubbad

Løset

Lü

et al. 2018

Volume 8: Polar and Arctic Sciences and Technology; Petroleum Technology

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As offshore activities in the Arctic constitute a relatively new field with only a handful of relevant operations to draw experience from, and since full-scale trials are extremely expensive, there is an expressed need for much more extensive, detailed and cost-efficient analysis of concepts based on numerical simulations. However, until recently simulation tools of sufficient quality to perform such numerical analysis have not existed. The only verification available has been through a limited set of experiments in ice model basins. Today, this has changed, partly through the efforts at the Norwegian University of Science and Technology (NTNU) hosting SAMCoT (Centre for Research-based Innovation - Sustainable Arctic Marine and Coastal Technology), laying the foundation of a versatile and highly accurate high-fidelity numerical simulator for offshore structures in various ice conditions such as level ice, broken ice and ice ridges. Arctic Integrated Solutions AS (ArcISo) is a spin-off company from NTNU established in 2016 with the vision of increasing the technology readiness level of SAMCoT’s numerical models to become a professional software package for the analysis of sea ice actions and action effects on Arctic offshore and coastal structures. This software package is called Simulator for Arctic Marine Structures (SAMS) and it was first released in 2017. This paper introduces the software implementation and the theoretical basis of SAMS, and it discusses the use of full-scale data to validate the simulator.

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“…Recently, renewed interest has been drawn to model and design floating ice sheets as supporting structures for oil rigs, pipes, roads, runways and platforms [7]. Climate change and extensive investigation of the interaction between ice-shelf cracking and impinging sea-waves, in a process somewhat similar to that leading to edge waves excited by deep water surface waves [10], are also motivating further research in the field [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Flexural edge waves generated by steady-state propagation of a loaded rectilinear crack in an elastically supported thin plate

2017

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The problem of a rectilinear crack propagating at constant speed in an elastically supported thin plate and acted upon by an equally moving load is considered. The full-field solution is obtained and the spotlight is set on flexural edge wave generation. Below the critical speed for the appearance of travelling waves, a threshold speed is met which marks the transformation of decaying edge waves into edge waves propagating along the crack and dying away from it. Yet, besides these, and for any propagation speed, a pair of localized edge waves, which rapidly decay behind the crack tip, is also shown to exist. These waves are characterized by a novel dispersion relation and fade off from the crack line in an oscillatory manner, whence they play an important role in the far field behaviour. Dynamic stress intensity factors are obtained and, for speed close to the critical speed, they show a resonant behaviour which expresses the most efficient way to channel external work into the crack. Indeed, this behaviour is justified through energy considerations regarding the work of the applied load and the energy release rate. Results might be useful in a wide array of applications, ranging from fracturing and machining to acoustic emission and defect detection.

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Out-of-plane failure of an ice floe: Radial-crack-initiation-controlled fracture

Cited by 54 publications

References 27 publications

Peridynamic Model for a Mindlin Plate Resting on a Winkler Elastic Foundation

Peridynamic Model for a Mindlin Plate Resting on a Winkler Elastic Foundation

Simulator for Arctic Marine Structures (SAMS)

Flexural edge waves generated by steady-state propagation of a loaded rectilinear crack in an elastically supported thin plate

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