and s of shock-wave and high-strain-rate phenomena in belgium

Ultrafast high strain rate acoustic wave measurements …

Michael R. Armstrong, Jonathan C. Crowhurst, Evan J. Reed, and Joseph M. Zaug "Ultrafast high strain rate acoustic wave measurements at high static pressure in a diamond anvil cell", Proc. SPIE 7214, Ultrafast Phenomena in Semiconductors /p>

Experimental and numerical investigations of shock and shear wave …

of shock and shear wave propagation induced by femtosecond laser irradiation in epoxy resins Journal of Physics D: Applied Physics - Vol. 48, p.(9) - 2015 Any correspondence concerning this service should be sent to the repository

Micro Scale Laser Shock Processing of Metallic …

Shock pressure and strain/stress are properly modeled to reflect the micro scale involved, and the high strain rate and ultrahigh pressure involved. Numerical solutions of the model are experimentally validated in terms of the geometry of the shock-generated plastic deformation on target material surfaces as well as the average in-depth strains under various conditions.

Comparison of experimental shock-wave profiles for …

@article{osti_6036032, title = {Comparison of experimental shock-wave profiles for tungsten and computer simulations using a rate-dependent constitutive model}, author = {Steinberg, D.J.}, abstractNote = {The Steinberg-Guinan-Lund, rate-dependent, constitutive model for Ta has been applied to W. Computer simulation successfully predicts the elastic precursor ahead of the second shock in a

In situ X-ray diffraction measurement of shock-wave …

X-MOL,Nature——In situ X-ray diffraction measurement of shock-wave-driven twinning and lattice dynamics.,C E Wehrenberg, D McGonegle, C Bolme, A Higginbotham, A Lazicki, H J Lee, B Nagler, H-S Park, B A Remington, R E Rudd, M

Adiabatic Shear in annealed and shock-hardened iron …

Adiabatic shear localization is a astrophic failure mechanism which can occur in ductile metals under high strain rate loading. This mechanism is driven by a thermal instability process in which rapid temperature rise due to plastic work couples with thermal softening to cause uniform deformation to collapse into narrow bands of intense shear within which material ductility is exhausted

K.T. Ramesh - HEMI

Director, HEMI K.T. Ramesh, the Alonzo G. Decker, Jr., Professor of Science and Engineering at Johns Hopkins, is known for research in impact physics and the failure of materials under extreme conditions. Ramesh also is a professor in the Department of

Sridhar Pappu - Adjunct Professor - Case Western …

Anomalous flow phenomena in a high-oxygen-containing tantalum explosively formed projectile Proceedings of EXPLOMET 2000 - Fundamental Issues and Appliions of Shock-Wave and High-Strain-Rate Phenomena, Elsevier Science Ltd., Oxford, UK, pp. 375

arXiv:2008.01404v1 [physics.flu-dyn] 4 Aug 2020

value on a time-scale of tens of microseconds. The extremely large strain rates associated with bubble col-lapse, up to 106 s 1, can be used to probe the high-strain rate rheology of soft materials, as will be described in Section V. Di usive transport followed by

Veronica Eliasson | CV

International Shock Interaction Symposium (ISIS21), August 3 8, Riga, Latvia, 2014, pp. 111 114, ISBN 978 9934 517 57 0 C7. R. Patwardhan*, V. Eliasson, "Numerical simulations of shock wave propagation and fluid structure coupling in water filled convergent thin

Advanced Numerical Methods for Simulation of Shock waves …

Advanced Numerical Methods for Simulation of Shock‐waves Induced by High Energy Particle Beams A. 1Dallocchio , A. Bertarelli 1,1, F. Carra 1, N. Mariani 2 L. Peroni 3, M. Scapin 3 (1) CERN, EN‐MME, Geneva, Switzerland (2) Politecnico di Milano, Milan, Italy

Carl TRUJILLO | Los Alamos National Laboratory, NM | …

Typically, the material undergoes a sequence of compression followed by release into high rate (on the order of 104 s-1 and up) tension, causing voids to nucleate and grow, which can then coalesce

TRAVELING WAVES AND SHOCKS IN A VISCOELASTIC …

Note that if a traveling wave exists, then it moves with the same speed as traveling waves in Burgers’ equation (1.1) and shock waves in inviscid Burgers’ equation (1.2). We obtain the equation for the velocity profile, U, by using (3.1) and (3.5) to

A theoretical model for fragmentation of viscous bubbly magmas in shock …

A theoretical model for fragmentation of viscous bubbly magmas in shock tubes T. Koyaguchi and N. K. Mitani Earthquake Research Institute, University of Tokyo, Tokyo, Japan Received 1 Noveer 2004; revised 15 June 2005; accepted 6 July 2005; published 7

ELLIPSOIDS, COLLECTIVE MOTION OF DISLOIONS, AND RATE …

Large strains, strain rates and temperatures in predicting chip formation in metal cutting of carbon and low alloy steels, Tom Childs, University of Leeds τ k F C F T t h 0.00 0.05 0.10 0.15 0.20 0.25 0 200 400 600 800 1000 Upper yield Flow stress (MPa) Strain -1)

The mechanochemistry in heterogeneous reactive …

Rise-time dispersive signatures are consistently observed under uniaxial strain loading, indiing complex compaction phenomena, which are reproducible by the meso-scale simulations. The simulations show the prevalence of shear banding and particle agglomeration in the uniaxial stress case, providing a possible rationale for the lower observed reaction threshold.

Femtosecond laser peening of 2024 aluminum alloy …

30/11/2016· In shock compression above the Hugoniot elastic limit or high strain-rate deformation, the generation of disloions dominates this phenomenon premising that the velocity of disloions does not exceed the sound velocity.

G. Ravichandran - Caltech

Upon shock compression to 318 GPa, we observe the first loss of solid diffraction s as well as loss of texture, consistent with melt, shown in panel b.) Shearing Resistance of Glasses at High Pressures and High Strain Rates Christian Kettenbeil

Ruqiang Feng | College of Engineering | University of …

Dr. Feng''s research is focused on experimental and computational mechanics of materials. Areas of interest include inelastic deformation, damage and failure mechanisms of solids, high strain rate and shock wave phenomena, rheology of polymers and polymer

Evolution of specimen strain rate in split Hopkinson bar …

7/1/2019· Modelling and simulation (M & S) 1 –7 helps one to understand the evolution of the high-strain-rate phenomena on a step-by-step basis and is a time- and cost-efficient design approach.

Entropy-dominated dissipation in sapphire shock …

Wang Y and Mikkola D E 1992 Shock-Wave and High Strain Rate Phenomena in Materials 1031-1040 Google Scholar [17] Ashuach Y, Rosenberg Z and Dekel R 2007 Shock Compression of Condensed Matter-2007 473-476 Google Scholar [18] Reinhart W D 33

Johnson–Holmquist damage model - Wikipedia

The Johnson-Holmquist material model (JH-2), with damage, is useful when modeling brittle materials, such as ceramics, subjected to large pressures, shear strain and high strain rates. The model attempts to include the phenomena encountered when brittle materials are subjected to load and damage, and is one of the most widely used models when dealing with ballistic impact on ceramics.

State-Specific Modeling of Vibrational Relaxation and …

The predicted radiative contribution from the oxygen Schumann–Runge band is dominant in the spectral range 200–300 nm for shock speeds of 5 – 8 km / s. Comparison to shock-tube absolute intensity measurements has provided indiions for improvement of nonequilibrium flow modeling.

Utilization of Versatile Experimental Diagnostics to Characterize …

-HMX Exhibits 2- and 3-Wave Responses to High Strain-Rate Shock Impacts on the 1 ns timescale < 100 ps P C-J ≈39 GPa 2-Wave Response 3-Wave Response For the (010) impact ([101] direction), only brittle failure occurs – no twinning or slip Proc. Roy

Shock reactive mechanism for direct synthesis of titanium …

Aizawa, T, Kamenosono, S, Tanaka, K & Kihara, J 1995, '' Shock reactive mechanism for direct synthesis of titanium aluminides from element powder mixture. '', Metallurgical and Materials Appliions of Shock-Wave and High Strain-Rate Phenomena., vol. (1995), pp. 645-652.

High strain rate deformation in FCC metals and alloys …

The U.S. Department of Energy''s Office of Scientific and Technical Information OSTI.GOV Conference: High strain rate deformation in FCC metals and alloys

Computational design of recovery experiments for ductile …

Shock-wave and high-strain-rate phenomena in materials, Meyers M.A, Murr L.E& Staudhammer K.P. 1992 pp. 899–912. Eds. New York: Marcel-Dekker. Google Scholar Gray G.T Influence of shock-wave deformation on the structure/property behavior of. . 1993