2006/1/20· ABSTRACT. The shock behavior of two varieties of the ceramic silicon carbide was investigated through a series of time-resolved plate impact experiments reaching stresses of over 140 GPa. The Hugoniot data obtained are consistent for the two varieties tested as well as with most data from the literature. Through the use of reshock and release
T.J. Holmquist G.R. Johnson This article addresses the response of boron carbide (B4C) to high-velocity impact. The authors previously characterized this material in 1999, using the Johnson
Johnson, G.R. andHolmquist, T.J. “Response of Aluminum Nitride (Including a Phase Change) to Large Strains, High Rates, and High Pressures.”Journal of Applied Physics,94 (3),1639–1646 (2003). Article Google Scholar 17.
2021/5/12· Marcel Schwantes’ guest on this week’s Love In Action show is internationally renowned leadership coach, ser and bestselling author, Robb Holman. Robb’s recently released book, All In: How Impactful Teams Build Trust From The Inside Out, takes leaders on an inspirational and practical journey of learning.
This article presents an analysis of the response of boron carbide (B4C) to severe loading conditions that produce large strains, high strain rates, and high pressures. Experimental data from the literature are used to determine and/or estimate constants for the JH-2 constitutive model for brittle materials. Because B4C is a very strong material, it is not always possible to determine the
The war to technology and economic powers has been the driver for industrialization in most developed countries. The first industrial revolution (industry 1.0) earned millions for textile mill owners, while the second industrial revolution (industry 2.0) opened the way for tycoons and captains of industry such as Henry Ford, John D. Rockefeller, and J.P. Morgan. The third industrial revolution
This article addresses the response of failed ceramics. Under high-velocity impact, ceramics transition from a solid intact material to a fragmented and granular material. This process is often referred to as “damage and failure” and is a complex phenomenon. Because ceramics are very strong in compression, it is difficult to perform laboratory experiments that produce conditions similar to
2006/1/20· ABSTRACT. The shock behavior of two varieties of the ceramic silicon carbide was investigated through a series of time-resolved plate impact experiments reaching stresses of over 140 GPa. The Hugoniot data obtained are consistent for the two varieties tested as well as with most data from the literature. Through the use of reshock and release
Advances in ceramic armor : a collection of papers predsented at the 29th international conference on advanced ceramics and composites, January 23-28, 2005, Cocoa Beach, Florida editor Jeffrey J. Swab （Ceramic engineering and science proceedings, v. 26, no. 7） American Ceramic Society, c2005
1998/7/10· Journal Article Holmquist, T J; Johnson, G R - Journal of Applied Physics This article addresses the response of boron carbide (B{sub 4}C) to high-velocity impact. The authors previously characterized this material in 1999, using the Johnson-Holmquist …
The archaeology and ethnoarchaeology of rain-fed cultivation in arid and hyper-arid North Africa - Volume 93 Issue 370 Rain-fed cultivation in drylands—especially in arid and hyper-arid areas—is often considered to play a minor role in human subsistence.
2006/12/1· T.J. Holmquist, G.R. Johnson Response of silicon carbide to high velocity impact J Appl Phys, 91 (9) (2002), pp. 5858-5866 View Record in Scopus Google Scholar Century Dynamics. AUTODYN theory manual, revision 4.3, March 2005. Google Scholar
2017/1/28· Can''t sign in? Forgot your password? Enter your email address below and we will send you the reset instructions Email Cancel Timothy J. Holmquist, Gordon R. Johnson and Charles A. Gerlach Published: 28 January 2017 Article ID: 20160182
2017/1/1· G.R. Johnson, T.J. Holmquist, A computational constitutive model for brittle materials subjected to large strains, high strain rates and high pressures, Shock-wave and high-strain- rate phenomena in materials, Marcel Dekker Inc.(1992) 1075-1081.
2013/6/1· G.R. Johnson, T.J. Holmquist, S.R. Beissel Response of aluminum nitride (including a phase change) to large strains, high strain rates, and high pressures J Appl Phys , 94 ( 3 ) ( August 2003 ) , pp. 1639 - 1646
2017/1/28· where denote, respectively, the length of the sample, the one-dimensional wave speed in the specimen (where E and ρ are the Young''s modulus and density of the specimen, respectively) and the failure strain of the tested material. Considering classical values of for brittle materials and five wave round-trips in a concrete sample, the maximum strain rate cannot exceed approximately 1 s −1 to
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2017/1/1· 1. Introduction. In 2011, Holmquist and Johnson [ 1] presented a computational constitutive model for glass subjected to large strains, high strain rates and high pressures (going forward this will be referred to as the ‘original’ model). This model included many features to describe the complex responses observed in glass (the reader is
2006/12/1· T.J. Holmquist, G.R. Johnson Response of silicon carbide to high velocity impact J Appl Phys, 91 (9) (2002), pp. 5858-5866 View Record in Scopus Google Scholar Century Dynamics. AUTODYN theory manual, revision 4.3, March 2005. Google Scholar
2017/1/28· Holmquist TJ, Johnson GR, Cook WH. 1993 A computational constitutive model for concrete subjected to large strains, high strain rates, and high pressures. In Proc. 14th Int. Symp. on Ballistics , vol. 2, pp. 591–600.
Simulation of Ballistic Impact of a Tungsten Carbide Sphere on a Confined Silicon Carbide Target by C. G. Fountzoulas, B. A. Cheeseman, and J. C. LaSalvia ARL-RP-250 June 2009 A reprint from the Proceedings of the 23rd International Symposium on Ballistics,
A new cyclopalladation reaction involving facile chelated transmetallation: selective cleavage of carbon-tin and carbon-silicon bonds of stannyl and silyl ketoximes. Iron (II) Complexes Bearing Chelating Cyclopentadienyl-N-Heterocyclic Carbene Ligands as alysts for Hydrosilylation and Hydrogen Transfer Reactions.
1995/3/1· The U.S. Department of Energy''s Office of Scientific and Technical Information @article{osti_41367, title = {High strain rate properties and constitutive modeling of glass}, author = {Holmquist, T J and Johnson, G R and Lopatin, C M and Grady, D E and Hertel, Jr, E S}, abstractNote = {This paper presents experimental data and computational modeling for a well-defined glass material.
The archaeology and ethnoarchaeology of rain-fed cultivation in arid and hyper-arid North Africa - Volume 93 Issue 370 Rain-fed cultivation in drylands—especially in arid and hyper-arid areas—is often considered to play a minor role in human subsistence.
This paper presents computational modeling of ceramic dwell and interface defeat, using the EPIC code and the JH-1 constitutive model for ceramics. Computations are presented for various projectiles impacting various silicon carbide (SiC-B) targets. The computational results are shown to provide good agreement with experimental data in the literature. Also included are the JH-1 constants for
Plants depend fundamentally on establishment from seed. However, protocols in trait-based ecology currently estimate seed size but not seed nuer. This can be rectified. For annuals, seed nuer should simply be a positive function of vegetative biomass and a
Abstract This paper presents constitutive modeling of aluminum nitride (AlN) for severe loading conditions that produce large strains, high-strain rates, and high pressures. The Johnson–Holmquist constitutive model (JH-2) for brittle materials is used. Constants are obtained for the model using existing test data that include both laboratory and ballistic experiments. Due to the wide range
2019/10/10· An average κ value of 0.04 was found for the sampled BC aerosol and was increased by ∼0.06 after 40 h aging in the atmosphere (Perring et al., 2017). In another study (Ohata et al., 2016), an aerosol particle mass analyzer (APM) was coupled to a humidified SP2 to investigate hygroscopic properties of BC aerosol.
Interface Defeat, which can effectively defeat the long-rod projectile (LRP), is a specific phenomenon of ceramic armor. Studies on this area have been conducted for the last three decades both at home and abroad proving that delaying dwell time or increasing interface defeat/penetration transition velocity can defeat projectile and enhance the
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