Use of the Richtmyer-Meshkov Instability to Infer Yield Stress at High-Energy Densities

Dimonte, Guy; Terrones, Guillermo; Cherne, F. J.; Germann, Timothy C.; Dupont, Virginie; Kadau, Kai; Buttler, W. T.; Oró, D.; Morris, C. L.; Preston, Dean L.

doi:10.1103/physrevlett.107.264502

Cited by 102 publications

(67 citation statements)

References 19 publications

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“…al. [9,10] for an Atwood number of +1, this critical kh 0 at which the spike reaches a steady state value is related to the yield stress; Dimonte et al have quantitatively analyzed this for our A = −1 conditions in a forthcoming report [12].…”

Section: Resultsmentioning

confidence: 99%

“…At conditions well above melt, a significant amount of atomization takes place when the shock wave reaches the free surface. At conditions below the melt transition, a spike develops that may or may not saturate, depending upon the material's yield strength [12] and the initial "machined" surface amplitude. Although the initial instability is symmetric the resulting structure may or may not be symmetric.…”

Section: Resultsmentioning

confidence: 99%

“…MD is unique in that the material properties are a result of the atomic potential and can be measured indepedntly of the RMI [11]. This provides a self-consistent validation for models of the RMI in materials with strength [12].…”

Section: Introductionmentioning

confidence: 99%

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Richtmyer-Meshkov instability examinedwith large-scalemolecular dynamics simulations

Cherne

Dimonte

Germann

2012

AIP Conference Proceedings

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Richtmyer-Meshkov instability examinedwith large-scalemolecular dynamics simulations

Cherne

Dimonte

Germann

2012

AIP Conference Proceedings

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“…The idea was first proposed and studied with simulations by Piriz et al [68,69]. Experiments based on the Piriz idea with A t > 0, extended to the situation where A t = −1, in the ejecta regime, are reported in [40,70], and since then the approach has been extensively studied [71,72].…”

Section: Smentioning

confidence: 99%

Foreword to the Special Issue on Ejecta

Buttler

Williams

Najjar

2017

J. dynamic behavior mater.

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A Brief History of Ejecta Physics 1950s and 1960sThere exists anecdotal evidence that ejecta research began in the 1950s, but little of this early research was documented publicly. In Russia, the ejecta phenomenon was first observed in plate impact experiments, and shown to be dependent on the initial surface roughness [1]. The Los Alamos PHERMEX radiographic facility was used to study the production and interaction of jets from shocked surfaces, starting from its very first shot in 1963 [2]. By 1969, Bristow and Hyde [3] describe the results of a mature program in the UK using photographic imaging of ejecta processes to infer whether melt had occurred at the surface of shocked materials. They showed that drive nonuniformity and subsurface fragmentation (spall/scabbing) were also contributory factors in determining the nature of ejecta produced. 1970sThe earliest published ejecta research was done by James Asay [4]. Asay went on to develop a non-radiographic ejecta diagnostic, the eponymous Asay foil [5]. Later, he developed a prescriptive model of ejecta, where he associated the amount of mass ejected from a shocked surface to the volume of surface defects, the rise time of the shock impulse, the yield strength of the material, and the phase of the material on release, i.e., liquid or solid [6]; interestingly he also observed that ejecta production was independent over broad ranges to the peak loading stress P S . Los Alamos National Laboratory (LANL) also became active in the development of ejecta diagnostics, as released by Hopson and Olinger [7].Ejecta physics is a young field, having developed over the last 60 years or so. Essentially, ejecta forms as a spray of dense particles generated from the free surface of metals subjected to strong shocks, but the detailed mechanisms controlling the properties of this particulate ejecta are only now being fully elucidated. The field is dynamic and rapidly growing, with military and industrial applications, and applications to areas such as fusion research.This Special Issue on Ejecta reports the current state of the art in ejecta physics, describing experimental, theoretical and computational work by research groups around the world. While much remains to be done, the dramatic recent progress in the field, some of it first reported here, means that this volume provides a particularly timely review.In this foreword, we provide a brief historical overview of the development of ejecta physics, to define the context for the work in the rest of this Special Issue.

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“…A number of experiments have been performed to study the spike and bubble growth in plane wave driven Richtmyer-Meshkov instability growth in both solid and liquid metals [27][28][29][30][31]. These data have been used to develop new models of the dynamics of instability growth and ejecta formation with unsupported shocks.…”

Section: Richtmyer-meshkov Instability With the ×3 Lensmentioning

confidence: 99%

New Developments in Proton Radiography at the Los Alamos Neutron Science Center (LANSCE)

et al. 2015

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An application of nuclear physics, a facility for using protons for flash radiography, has been developed at the Los Alamos Neutron Science Center (LANSCE). Protons have proven far superior to high energy x-rays for flash radiography because of their long mean free path, good position resolution, and low scatter background. Although this facility is primarily used for studying very fast phenomena such as high explosive driven experiments, it is finding increasing application to other fields, such as tomography of static objects, phase changes in materials and the dynamics of chemical reactions. The advantages of protons are discussed, data from some recent experiments will be reviewed and concepts for new techniques are introduced.

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Use of the Richtmyer-Meshkov Instability to Infer Yield Stress at High-Energy Densities

Cited by 102 publications

References 19 publications

Richtmyer-Meshkov instability examinedwith large-scalemolecular dynamics simulations

Richtmyer-Meshkov instability examinedwith large-scalemolecular dynamics simulations

Foreword to the Special Issue on Ejecta

New Developments in Proton Radiography at the Los Alamos Neutron Science Center (LANSCE)

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