PENETRATION STUDIES OF ICE WITH APPLICATION TO ARCTIC AND SUBARCTIC WARFARE - PHASE II STUDY.
PENETRATION STUDIES OF ICE WITH APPLICATION TO ARCTIC AND SUBARCTIC WARFARE - PHASE II STUDY.

Author:

Publisher:

Published: 1967

Total Pages: 150

ISBN-13:

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Impact tests with freely falling and explosively powered projectiles were performed on laboratory sea ice test slabs made from frozen seawater at Stanford Research Institute, and on Arctic sea ice in situ at Point Barrow, Alaska. In the experiments, particular attention was devoted to studying the mechanisms of penetration and perforation. Ranges of values investigated for the basic parameters were: impact velocity, 8-20 ft/sec and 50-494 ft/sec; projectile weights, 0.75, 9.69, and 41.5 lb; penetrator diameters, 5/8 in., 1-1/ 4 in., and 6 in.; penetrator profiles, blunt and conical; sea ice thickness, 3- 3/8 - 17 in.; sea ice temperature, +7F - +32F, and sea ice salinity, 7.2 - 17.1 ppm. All tests were carried out at normal incidence except for one sequence on Arctic sea ice in which the angle of incidence was 17.3 degrees from vertical. Results of the tests indicate that a cylindrical, blunt-end penetrator was more effective in perforation than a corresponding penetrator with a conical end. The blunt penetrator, impacting at normal incidence, perforated both laboratory sea ice and Arctic sea ice by expelling a cylindrical-conical shear plug from the test specimen. For this behavior, a mathematical model was constructed and a theoretical analysis developed from which the minimum impact velocity for perforation (critical velocity) was obtained. The critical velocity was found to be a function of projectile mass and diameter, and sea ice thickness, shear strength, tensile strength, and elastic modulus. The theory did not consider effects due to cratering.

High-speed Penetration Dynamics: Engineering Models And Methods
High-speed Penetration Dynamics: Engineering Models And Methods

Author: Gabi Ben-dor

Publisher: World Scientific

Published: 2013-06-07

Total Pages: 697

ISBN-13: 9814439061

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This important monograph is the first comprehensive compendium of engineering models used in high-speed penetration mechanics.The book consists of two parts. The first part (more than a quarter of the book's content) is in fact a handbook giving a very detailed summary of the engineering models used for the analysis of high-speed penetration of rigid projectiles into various media (concrete, metals, geological media). The second part of the book demonstrates the possibilities and efficiency of using approximate models for investigating traditional and nontraditional problems of penetration mechanics.Different chapters in the books are devoted to different classes of problems and can be read independently. Each chapter is self-contained, which includes a comprehensive literature survey of the topic, and carries a list of used notations. The bibliography includes more than 700 references.This monograph is a reliable and indispensable reference guide for anyone interested in using engineering models in high-speed penetration mechanics.

Engineering Models In High-speed Penetration Mechanics And Their Applications (In 2 Volumes)
Engineering Models In High-speed Penetration Mechanics And Their Applications (In 2 Volumes)

Author: Gabi Ben-dor

Publisher: World Scientific

Published: 2018-12-28

Total Pages: 1116

ISBN-13: 9813273488

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This two-volume, 1100 pages, 38 chapters book is a significantly expanded, revised and updated version of the monograph by the authors published in 2013 (Ben-Dor, G, Dubinsky, A, Elperin, T, 'High Speed Penetration Dynamics: Engineering Models and Methods,' Singapore: World Scientific Publishing Company). The contents increased by 60%, the number of titles in bibliography doubled and reached 1600; and the scope covers a range of new topics related to hypervelocity penetration, along with high-speed impact.Presented material is structured into two parts. The first part includes description and analysis of practically all known engineering models for calculating high-speed penetration of projectiles into concrete, metals, geological shields, adobe, and gelatine.The second part focuses on the use of approximate models for solving conventional and non-standard problems of penetration mechanics including prediction and optimization of protective properties of monolithic and multi-layered shields against high-speed projectiles and space debris; shape optimization of high-speed projectiles penetrating into various media; modelling of penetration and optimal control of penetrators equipped with jet thrusters; and investigation of the efficiency and optimization of segmented projectiles. The book includes comprehensive overviews on basic classes of problems in high-speed penetration mechanics.This is a indispensable reference guide for scientists, engineers, and students specializing in the field of high-speed and hypervelocity penetration mechanics.

Journal of Hydronautics
Journal of Hydronautics

Author:

Publisher:

Published: 1968

Total Pages: 816

ISBN-13:

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A publication of the American Institute of Aeronautics and Astronautics devoted to marine science and technology.