Peridynamics simulation of the fragmentation of ice cover by blast loads of an underwater explosion

Abstract Along with the development in arctic region, the icebreaking technologies are gradually becoming the focus. As one of the most powerful and effective way to breaking ice, especially in the ability to solve ice jams, the study of the behaviour of the sea and river ice under dynamic loads is an urgent subject of scientific research and it attracts extensive attention. In addition, the temperature change in the process of ice failure cannot be neglected since that temperature plays an important role in the mechanical properties of the ice. In this study, a fully coupled thermoelastic ordinary state-based Peridynamic model is employed to investigate fragmentation of ice cover subjected to an underwater explosion. Both the deformation effect on the thermal effects and the thermal effects on deformation are taken into consideration. The pressure shocks generated by the underwater explosion are applied to the bottom surface of the ice cover for non-uniform load distributions. Crack propagation paths are investigated, the damage is predicted and compared with existing experimental results. The corresponding temperature distributions are also examined. Furthermore, the ice failure mode in both the top surface and the bottom surface of the ice sheet is investigated.

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Study of the underwater explosion impact on the ice cover

Engineering Journal Science and Innovation ◽

10.18698/2308-6033-2021-2-2052 ◽

2021 ◽

Author(s):

A.S. Savin ◽

N.I. Sidnyaev ◽

M.M. Tedeluri

Keyword(s):

Computer Simulation ◽

Hydrostatic Pressure ◽

Cylindrical Shells ◽

Underwater Explosion ◽

Ice Cover ◽

Physical Parameters ◽

Combined Action

The paper presents the results of studies of the features of deformation and destruction of the ice cover affected by a close underwater explosion, as well as by horizontally installed cylindrical shells under the combined action of the explosion and hydrostatic pressure. The research is based on the results of computer simulation of the processes of underwater explosion and ice cover deformation. It is shown that the second pulsation of the bubble exerts a controlling influence on the nature and parameters of the deformation and destruction of the ice cover under the combined action of a close underwater explosion and a large hydrostatic pressure on the shell. The dependence of the ice explosion resistance on the depth and power of the charge is determined. The influence of the main physical parameters of ice on the explosion resistance is revealed. The results of the research can be used for creating structures effectively resisting the effects of a close underwater explosion.

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Behavior of a Semi-Infinite Ice Cover under a Uniformly Moving Load

Прикладная механика и техническая физика ◽

10.15372/pmtf20180209 ◽

2018 ◽

Keyword(s):

Moving Load ◽

Ice Cover

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Increasing Efficiency of Resonance Method of Fracturing an Ice Cover with the Simultaneous Movement of Two Air Cushion Vehicles

Прикладная механика и техническая физика ◽

10.15372/pmtf20170220 ◽

2017 ◽

Keyword(s):

Resonance Method ◽

Ice Cover ◽

Air Cushion ◽

Simultaneous Movement ◽

Air Cushion Vehicles

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Finite Element Simulation and Assessment of Single-Degree-of-Freedom Prediction Methodology for Insulated Concrete Sandwich Panels Subjected to Blast Loads

10.15554/pci.rr.misc-003 ◽

2011 ◽

Author(s):

Charles Michael Newberry

Keyword(s):

Finite Element ◽

Finite Element Simulation ◽

Sandwich Panels ◽

Degree Of Freedom ◽

Blast Loads ◽

Single Degree Of Freedom ◽

Single Degree ◽

Element Simulation

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Seasonal variations in the properties and structural composition of sea ice and snow cover in the Bellingshausen and Amundsen Seas, Antarctica

Journal of Glaciology ◽

10.3189/s0022143000002902 ◽

1997 ◽

Vol 43 (143) ◽

pp. 138-151 ◽

Cited By ~ 2

Author(s):

M. O. Jeffries ◽

K. Morris ◽

W.F. Weeks ◽

A. P. Worby

Keyword(s):

Sea Ice ◽

Isotopic Composition ◽

Snow Cover ◽

Sea Water ◽

Ice Cores ◽

Ice Cover ◽

Snow Accumulation ◽

Ice Formation ◽

Frazil Ice ◽

Core Sets

AbstractSixty-three ice cores were collected in the Bellingshausen and Amundsen Seas in August and September 1993 during a cruise of the R.V. Nathaniel B. Palmer. The structure and stable-isotopic composition (18O/16O) of the cores were investigated in order to understand the growth conditions and to identify the key growth processes, particularly the contribution of snow to sea-ice formation. The structure and isotopic composition of a set of 12 cores that was collected for the same purpose in the Bellingshausen Sea in March 1992 are reassessed. Frazil ice and congelation ice contribute 44% and 26%, respectively, to the composition of both the winter and summer ice-core sets, evidence that the relatively calm conditions that favour congelation-ice formation are neither as common nor as prolonged as the more turbulent conditions that favour frazil-ice growth and pancake-ice formation. Both frazil- and congelation-ice layers have an av erage thickness of 0.12 m in winter, evidence that congelation ice and pancake ice thicken primarily by dynamic processes. The thermodynamic development of the ice cover relies heavily on the formation of snow ice at the surface of floes after sea water has flooded the snow cover. Snow-ice layers have a mean thickness of 0.20 and 0.28 m in the winter and summer cores, respectively, and the contribution of snow ice to the winter (24%) and summer (16%) core sets exceeds most quantities that have been reported previously in other Antarctic pack-ice zones. The thickness and quantity of snow ice may be due to a combination of high snow-accumulation rates and snow loads, environmental conditions that favour a warm ice cover in which brine convection between the bottom and top of the ice introduces sea water to the snow/ice interface, and bottom melting losses being compensated by snow-ice formation. Layers of superimposed ice at the top of each of the summer cores make up 4.6% of the ice that was examined and they increase by a factor of 3 the quantity of snow entrained in the ice. The accumulation of superimposed ice is evidence that melting in the snow cover on Antarctic sea-ice floes ran reach an advanced stage and contribute a significant amount of snow to the total ice mass.

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