Bulletin of the American Physical Society
16th APS Topical Conference on Shock Compression of Condensed Matter
Volume 54, Number 8
Sunday–Friday, June 28–July 3 2009; Nashville, Tennessee
Session Z4: EOS-3: Liquids Under Shock and Impact Loading |
Hide Abstracts |
Chair: Eric Brown, Los Alamos National Laboratory Room: Hermitage D |
Friday, July 3, 2009 10:30AM - 10:45AM |
Z4.00001: Shock Hugoniots of Molecular Liquids and Corresponding States Eric Chisolm, Scott Crockett, Sam Shaw We observe that the shock velocity-particle velocity Hugoniots for various diatomics and other materials (e.g. nitrogen, oxygen, carbon dioxide) in the liquid phase lie almost on top of one another, while their solid-phase Hugoniots do not. Recalling the work of Ross and Ree [J. Chem. Phys. 73, 6146 (1980)], we hypothesize that this is because these materials obey a principle of corresponding states. We use the principle to deduce how the Hugoniots of two corresponding materials should be related, and we compare the results with experimental data and find good agreement. We suggest this as a method for estimating the Hugoniot of a material of the appropriate type in the absence of shock data, and we illustrate with fluorine. [Preview Abstract] |
Friday, July 3, 2009 10:45AM - 11:00AM |
Z4.00002: Equation of State data from off-Hugoniot measurements in multiply-shocked liquids Mike Morley, David Chapman, William Proud Plate impact techniques were used to determine Equation of State data in liquids. A copper cell was constructed to confine a test liquid and facilitate the ring-up of stress in the sample. Copper flyer plates were impacted against the cell at a range of velocities inducing a number of stress states in the sample, both on- and off- the principal Hugoniot. It was assumed that a Mie-Gr\"{u}neisen form of the Equation of State was applicable. The arrival times and pressures measured at each shocked state allowed a best-fit value of the Gr\"{u}neisen parameter to be determined. The volume-dependence of the Gr\"{u}neisen parameter is also considered. [Preview Abstract] |
Friday, July 3, 2009 11:00AM - 11:15AM |
Z4.00003: Numerical Investigation on the High-Speed Water-Entry Behaviors of Cylindrical, Hemispherical and Conical Projectiles Zi-Tao Guo, Wei Zhang, Xin-Ke Xiao The water entry problem is considered as a classic problem which has a research history of more than 70 years, the water-entry process for projectiles with different nose will be significant for related application and experimental design. In this paper, a series of numerical simulations were conducted to study the water-entry behaviors of cylindrical, hemispherical and conical projectiles using the coupled Lagrange-Euler technology in hydro-code AUTODYN-2D. The detailed cavity expansion process and the cavity characteristics of three projectiles in the early stages of water-entry were obtained. The effects of the projectile nose shape and the projectile velocity on the cavity shapes were studied. Simultaneously, the laws of velocity attenuations for three projectiles were also proposed in this study. The results show that the influence of the projectile velocity on the cavity thickness is much larger than that of the projectile nose shapes, but compared with the effect on the cavity length, the nose shape influence shows little difference with that of the impact velocity. For an identical initial projectile velocity, the cylindrical projectile decays the fastest underwater followed by conical projectiles and hemispherical projectiles. [Preview Abstract] |
Friday, July 3, 2009 11:15AM - 11:30AM |
Z4.00004: Preliminary Study on Water Filled Tank Perforation by Rod Projectiles Xin-Ke Xiao, Zi-Tao Guo, Zhong-Cheng Mu, Wei Zhang The effects of fluid structure interactions resulting from the impact of a fluid filled tank is of the interests for engineers from both the military and civilian field, where hydrodynamic-ram (HRAM) phenomena is well known. And it is believed HRAM is responsible for the vulnerability and the possible catastrophic failure of the whole tank. Thus HRAM is related to the majority concerns on this topic, where the targets were usually assumed to be thin. In order to investigate the influence of water on the crashworthiness of a tank with relatively thick walls, 3 ballistic shots on the water filled tank with two 3 mm 2A12 aluminum plates as front and back target and 4 shots on the tank without any water by 12.7 mm rods were conducted. The failure patterns were indentified from the tests and the difference in the failure mechanism was further studied by a series of detailed numerical simulations on the corresponding tests in hydro-code AUTODYN-2D by using both the coupled Lagrange-Euler technology and the SPH method. And also, the challenge of numerical simulation in this field is addressed. [Preview Abstract] |
Friday, July 3, 2009 11:30AM - 12:00PM |
Z4.00005: Tension of liquids by shock waves Invited Speaker: Experimental investigation of dynamic tension of liquids (water, ethyl alcohol, glycerol, hexane, hexadecane and pentadecane) under shock waves have been investigated. The method of spall strength measurements was applied and wave profiles were registered by laser interferometer VISAR. It was found that negative pressures in liquids were almost independent from the value of stain rate when the temperature was far from melting point. For example, for water at 20 $^{\circ}$C it is constant and equal to 50 MPa. But near melting point spall strength of water, hexadecane, pentadekane, and glycerol is a strong function of strain rate. It was shown that the double metastable state of water was realized during our experiments when the initial temperature was 0.4 $^{\circ}$C. Maximum value of strength 142 MPa was found for glycerol. The process of destruction in hexadecane and methyl alcohol is double staged. At the first stage formation of cavities starts and there is a kinked at free velocity profile was observed. At the second stage the cavity grow rate increases and the spall pulse occurs. Theory of homogeneous bubble nucleation was used to explain the experimental results.\\[4pt] In collaboration with Sosikov Vasiliy, Institute of Problems of Chemical Physics RAS. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700