Shock induced transitions and phase structures in general media



Publisher: Springer-Verlag in New York

Written in English
Published: Pages: 250 Downloads: 732
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Subjects:

  • Shock waves -- Congresses,
  • Plasticity -- Congresses
  • Edition Notes

    StatementJ.E. Dunn, Roger Fosdick, Marshall Slemrod, editors.
    SeriesThe IMA volumes in mathematics and its applications ;, v. 52
    ContributionsDunn, J. E., Fosdick, Roger., Slemrod, M., 1944-
    Classifications
    LC ClassificationsQA935 .S455 1993
    The Physical Object
    Pagination250 p. :
    Number of Pages250
    ID Numbers
    Open LibraryOL1397201M
    ISBN 100387940847, 3540940847
    LC Control Number93004682

The Riemann problem is considered for the investigation of nonclassical wave phenomena in Bethe--Zel'dovich--Thompson (BZT)-fluids and fluids which undergo a phase transition, i.e., the isentropes suffer kinks at the saturation boundaries. These fluids are modeled by a general equation of state that also takes into account regions of negative nonlinearity where the isentropes are nonconvex in. New shock-wave (Hugoniot) and release-adiabatic data for Fe O and CaO, to and GPa ( and Mbar) respectively, show that both oxides transform from their initial B1 (NaCl-type) structures at about 70 (±10) GPa. CaO transforms to the B2 (CsCl-type) structure . Bi I— Bi Il transition under shock loading by Duff and Minshall () confirmed the importance of shock load- ing experimentation in the study of polymorphic phase transitions. Shock-induced polymorphic transitions are important for their applications. A particularly notable application is in material synthesis, exemplified by production of. Exploring the origins and implications of sudden changes in nature and society, Phase Transitions examines different dynamical behaviors in a broad range of complex systems. Using a compelling set of examples, from gene networks and ant colonies to human language and the degradation of diverse ecosystems, the book illustrates the power of Reviews: 3.

A dissipative system is a thermodynamically open system which is operating out of, and often far from, thermodynamic equilibrium in an environment with which it exchanges energy and matter.A tornado may be thought of as a dissipative system. Dissipative systems stand in contrast to conservative systems.. A dissipative structure is a dissipative system that has a dynamical regime that is in.   According to Kraus, this was the very first in situ structure measurement of the shock-induced graphite to diamond transition. Before these experiments, all conclusions regarding this structural transition were based on the material that was recovered after applying the shock drive or dynamic measurements of macroscopic quantities, such as density and pressure. International Journal of Solids and Structu 17/18, () 12) P. Rosakis and J.K. Knowles, Unstable Kinetic Relations and the Dynamics of Solid-Solid Phase Transitions, Journal of the Mechanics and Physics of Sol 11/12, ().   Shape memory polymer (SMP) is a type of macromolecular smart material that can respond to external stimulus by changing its macroscopic properties (such as shape and color) and then recover its original shape from its temporary shape [1–10].Additionally, SMPs have the unique advantages of being lightweight and inexpensive and of having low density, good manufacturability, .

  Dynamic phase transition induced by a shock wave in hard-sphere and hard-disk systems is studied on the basis of the system of Euler equations with caloric and thermal equations of state. First, Rankine-Hugoniot conditions are analyzed. The quantitative classification of Hugoniot types in terms of the thermodynamic quantities of the unperturbed. The science of phase transitions hasn't been closed. Phase transitions are pretty generic properties of most physical systems - so whenever one learns new things about some physical systems, it's likely that one also learns something about some of their phase transitions. Depending on what you really want, you may choose one of the books about.   (e.g loss of family member through death) 9/30/ REALITY SHOCK & ROLE TRANSITION 13 Types Contd zational Transitions Changing environmental conditions that affect the lives of clients, as well as workers within them 9/30/ REALITY SHOCK & ROLE TRANSITION 14 9/30/ REALITY SHOCK & ROLE TRANSITION 15 A shape-memory alloy is an alloy that can be deformed when cold but returns to its pre-deformed ("remembered") shape when heated. It may also be called memory metal, memory alloy, smart metal, smart alloy, or muscle wire. [citation needed]Parts made of shape-memory alloys can be lightweight, solid-state alternatives to conventional actuators such as hydraulic, pneumatic, and motor-based .

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Shock Induced Transitions and Phase Structures in General Media (The IMA Volumes in Mathematics and its Applications) (v. 52) [Dunn, J.E., Fosdick, Roger, Slemrod, Marshall] on *FREE* shipping on qualifying offers.

Shock Induced Transitions and Phase Structures in General Media (The IMA Volumes in Mathematics and its Applications) (v. This IMA Volume in Mathematics and its Applications SHOCK INDUCED TRANSITIONS AND PHASE STRUCTURES IN GENERAL MEDIA is based on the proceedings of a workshop that was an integral part of the IMA program on "Phase Transitions and Free Boundaries." The workshop focused on the thermodynamics.

This IMA Volume in Mathematics and its Applications SHOCK INDUCED TRANSITIONS AND PHASE STRUCTURES IN GENERAL MEDIA is based on the proceedings of a workshop that was an integral part of the IMA program on "Phase Transitions and Free Boundaries.". Get this from a library.

Shock Induced Transitions and Phase Structures in General Media. [J E Dunn; Roger Fosdick; Marshall Slemrod] -- This volume focuses on the thermodynamics and mechanics of dynamic phase transitions and the consequent issues of rapid solidification, liquification, and vaporization.

The articles investigate. Shock induced transitions and phase structures in general media By J Dunn, Roger Fosdick and Marshall Slemrod No static citation data No static citation data CiteCited by:   tive to transition shock) is representative of the In general, the healthiest transition.

experiences for NLNs will be facilitated when they. have personal and professional lives characterized. Purchase Phase Transitions - - 1st Edition. Print Book & E-Book. ISBN  Shock-induced phase transitions in the MgO–FeO system. On the basis of the observed velocity and volume discontinuities along MgO Hugoniot, our preferred interpretation of the discontinuity is the result of a new high-temperature phase in MgO.

The transition boundary has to have a positive dT/dP Clapeyron slope Shock induced transitions and phase structures in general media book the volume. The MD simulations of bulk shock waves have indeed been instrumental in providing valuable information on the shock front structure, 59,60 shock-induced plasticity and phase transformations, [   We present a series of experiments probing the martensitic α–ω (hexagonal close-packed to simple hexagonal) transition in titanium under shock-loading to peak stresses around 15 GPa.

Gas-gun plate impact techniques were used to locate the α–ω transition stress with a laser-based velocimetry diagnostic. A change in the shock-wave profile at GPa suggests the transition begins at. DISSOCIATIVE PHASE TRANSITIONS, SPLIT SHOCK WAVES, RAREFACTION SHOCKS, AND DETONATIONS C.

WHITEt, D. ROBERTSONt, M. ELERTt, J. MINTMIREt, remains to be done to clarify the atomic-scale behavior of shock-induced chemistry in By 5 ps the overall shock wave structure in Model I has already begun.

L. Truskinovsky, Kinks versus shocks, in Shock Induced Transitions and Phase Structures in General Media.

The IMA Volumes in Mathematics and its Applications, ed. by J. Dunn (Springer, Berlin, ), pp. – CrossRef Google Scholar. Shock-induced α-ω phase transition and mechanisms of spallation in shock loaded titanium alloys AIP Conf. Proc.(); / Stress-wave-induced martensitic phase transformations in NiTi AIP Conf.

Proc.(); / [This article is copyrighted as indicated in the article. deduce phase change based on changes in refractive index of the sample,17 19 One of the main controversial questions for these experiments (refer the literature Ref) on shock induced phase transformation of water is the purity of the sample and the presence of trace impurities which may act as nucleators/inhibitors for phase transition.

The focus is on the evolution of phase transitions which may be either dynamic or quasi-static, controlled by a kinetic relation which in the framework of classical thermomechanics represents information that is supplementary to the usual balance principles and.

A full investigation of the details of shock-induced phase transitions under such general conditions will be left for future work. This paper is organized as follows: after a qualitative description presented in Section 2, Section 3 introduces the necessary notations and formalisms.

Shock compression and adiabatic release experiment have been performed on single crystal GaP oriented parallel to the () plane up to about GPa using a two‐stage light‐gas gun. Inclined mirror experiments reveal the three‐wave structure, yielding the Hugoniot elastic limit and apparent phase transition pressure to be and GPa, respectively.

Multimillion-atom molecular-dynamics simulations are used to investigate the shock-induced phase transformation of solid iron. Above a critical shock strength, many small close-packed grains nucleate in the shock-compressed body-centered cubic crystal growing on a picosecond time scale to form larger, energetically favored grains.

A split two-wave shock structure is observed. Having demonstrated the general feasibility of the approach and the agreement between model predictions and measurements through the above prototype experiments, (book review).

“ Kinks versus shocks ” in Shock Induced Transitions and Phase Structures in General Media, J. Dunn. Phase Transitions Induced by Shock Waves Kai Kadau,1,2* Timothy C. Germann,3 Peter S.

Lomdahl,1 Brad Lee Holian1 Multimillion-atom molecular-dynamics simulations are used to investigate the shock-induced phase transformation of solid iron. Above a critical shock strength, many small close-packed grains nucleate in the shock-compressed.

If shock-induced transition is so rapid that kinetic effects can be ignored, a steady two-wave structure is propagated. The first wave, of amplitude equal to the transition pressure, shocks the material to the phase boundary but produces no transition; the second, more» slower wave produces the transformed phase.

Coesite is an important geological mineral, yet it presents complicated phase transformations under compression. Earlier reports of pressure-induced amorphization have been later refined showing formation of various crystalline structures, including a high-pressure octahedral phase.

Due to the complicated structure nature of coesite, we need to represent the system in a relatively. Transition shock: the initial stage of role adaptation for newly graduated Registered Nurses.

Aim. The aim of this paper is to provide a theoretical framework of the initial role transition for newly graduated nurses to assist managers, educators and seasoned practitioners to support and facilitate this professional adjustment appropriately.

Decaying shocks are an efficient method to study phase transitions in transparent materi-als. A reflecting and not sustained shock is launched into an initially transparent material and its propagation is monitored measuring the time evolution of thermal emission, shock velocity and optical reflectivity at the shock.

of ~]-C3N 4 and our work on the crystal to amorphous phase transitions in q-GeO 2 and a-FePO 4. Keywords. Shock waves; phase transitions; materials synthesis; superhard materials. Introduction The study of pressure induced phase transitions is important both in basic science and in materials-synthesis applications.

The structure-phase transitions have been observed for several kinds of inorganic materials, TiO2, ZrO2, Gd3Ga5O12, AlN, ZnS, ZnSe, etc. The phase transition pressures under shock and static compressions of metals, ionic materials, semiconductors and.

Phase transitions occur throughout nature. The most familiar example is the one that occurs in water – the abrupt, discontinuous transition from a liquid to a gas or a solid, induced by a subtle environmental change.

Practically magical, the ever-so-slight shift of temperature or pressure can. The zero-pressure densities of some rock Hugoniots in their high-pressure phases are determined.

Comparison of these densities with experimental results on phase transitions of a number of rock-forming minerals suggests that the predominant transition in Stillwater bronzitite and Bushveld bronzitite is pyroxene → spinel + stipoverite (stishovite).

Experimental Observations of Polymorphic Phase Transitions A. Summary of shock-induced polymorphic phase transition measurements B. The Ci ~ € transition in iron C.

bcc iron base alloys D. Antimony E. Bismuth F. Graphite-to. Furthermore, we unambiguously determine the onset of melting above 14 GPa, previously ascribed to a solid–solid phase transition, undetectable in the now conventional shocked diffraction geometry; transitions to the liquid state are expected to be ubiquitous in all systems at sufficiently high pressures and temperatures.}, doi = {.

Judy Boychuk Duchscher, PhD, MN, RN, BScN, is Associate Professor, School of Nursing, Thompson Rivers University, Kamloops, British Columbia, Canada. Maryann Windey, PhD, MS, MSN, RN-BC, is Clinical Education Specialist, Lee Health, Fort Myers, Florida.

The authors have disclosed that they have no significant relationship with, or financial interest in, any commercial companies pertaining to.The abruptness of change in the features of the medium, that characterize shock waves, can be viewed as a phase transition: the pressure-time diagram of a supersonic object propagating shows how the transition induced by a shock wave is analogous to a dynamic phase transition.

When an object (or disturbance) moves faster than the information can propagate into the surrounding fluid, then the.Share this article via social media.

The general, fully coupled thermo-mechanical problem is formulated and analytical solutions are determined for the decoupled case and limit cases. Kinks versus Shocks, in Shock Induced Transitions and Phase Structures in General Media, J.

E. Dunn, R. Fosdick and M. Slemrod, Eds., Springer-Verlag.