Combined Theoretical and Experimental Study of Ice Behavior Under Shock and Explosive Loads

verfasst von: Dr. Maxim Yu. Orlov, Yulia N. Orlova

Verlag: Springer International Publishing

Buchreihe : SpringerBriefs in Applied Sciences and Technology

Enthalten in: Springer Professional "Wirtschaft+Technik" , Springer Professional "Technik"

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Über dieses Buch

The book presents theoretical and experimental studies of ice fracturing process during impact and explosion load. It shows how to obtain ice in natural and artificial conditions. The book summarizes the results of full-scale experiments for 5 years on undermining ice sheets with emulsion explosives. It presents an algorithm that simulates the process of fracturing of thick ice subjected to blast load, showing that the behavior of ice under impact and explosive loads can be described by a model of continuum mechanics. Qualitative and quantitative assessments of the ballistic perfomance of an ice cube after deep penetration low-velocity projectiles are reported in this book. Some pilot problems are formulated for a deeper understanding of the mechanics of ice fracturing during impact and explosion.

Inhaltsverzeichnis

Frontmatter

1. Phenomenological Model and Numerical Method

Abstract

This chapter presents phenomenological model of ice behaviour under loading and numerical method. Phenomenological model is a complex model of continuum mechanics. Numerical method is based on lagrangian approach of continuum motion. Equations of state ice, water and solids are presented. Deterministic approach for materials fracturing is described. We use several criterions of failure materials. Numerical method is modified by a few calculation algorithms for modeling penetration and perforation problems. An algorithm for smoothing the contact boundary at large deformation for modeling an ice sheet explosion is proposed. A brief flowchart of the computational algorithm is given.

Maxim Yu. Orlov, Yulia N. Orlova

2. Experimental Studies of the Destruction of Ice Subjected to Explosive and Shock Loading

Abstract

This chapter illustrates the results of series full-scale experiments. Results of experiments for 5 and more years are summed up. The experiments aimed to ice sheet behavior subjected to single charge explosive. There are four experimental sites on the Tom river. Research object is a 125-day ice sheet medium thickness, explosive substance mass is 4 kg. The explosion is made in the water under the ice sheet. We used several types of ice sheet, and obtained the diameter and form of ice hole. We investigated of morphology of ice destruction, including state of ice edge.

Maxim Yu. Orlov, Yulia N. Orlova

3. Numerical Modeling of Ice Fracture Subjected to Shock and Explosive Loads

Abstract

This chapter summaries results of numerical simulations only. The results obtained using computer code Impact 2D. We obtained computed values of deep penetration of low-velocity penetrator into ice block, and compared with experimental results. We made numerical simulation of full-scale experimental from previous chapter. The modeling of the explosion of thick ice is carried out using the proposed algorithm. A good agreement between experimental and numerical results is found.

Maxim Yu. Orlov, Yulia N. Orlova

4. Numerical Simulation of Deep Penetration Low Velocity Projectiles into Ice Block

Abstract

The chapter summarizeds the results of research of the destruction of an ice block with ogival, conical and blunt penetrators at low velocity (<325 m/s). Perforation duration, level of ice damage, diameter of crater into ice block, time of formation foci of destruction and crack path were examined. Time dependencies of the velocity of penetrator, depth of its penetration, and ice damage were plotted. Examination of the penetrators’ shapes showed that they were not plastic deformed. The results extend the knowledge of the destruction of ice exposed to shock loading. Some similarities in process of ice destruction were found regardless of the shape of the penetrator.

Maxim Yu. Orlov, Yulia N. Orlova

Backmatter

Titel: Combined Theoretical and Experimental Study of Ice Behavior Under Shock and Explosive Loads
verfasst von: Dr. Maxim Yu. Orlov
Yulia N. Orlova
Verlag: Springer International Publishing
Electronic ISBN: 978-3-030-97634-7
Print ISBN: 978-3-030-97633-0
DOI: https://doi.org/10.1007/978-3-030-97634-7

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