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  • 1
    Electronic Resource
    Electronic Resource
    Applying Steinberg's model to the Hugoniot elastic limit of porous boron carbide specimens (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 7890-7891 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Plate-impact experiments were performed on boron carbide specimens, having different porosities, in order to measure their Hugoniot elastic limit (HEL) values. The measurements were performed with commercial manganin gauges embedded at the back surface of the specimen and backed by a thick Plexiglas disk. The measured values show an almost linear decrease in the HEL values between 194 kbar (For the fully dense material) to 96 kbar for a specimen with 16.3% porosity. These values were compared with a theoretical model [suggested by D. Steinberg (LLL report LLL-UCID-16946, 1975)] which accounts for the dependence of the HEL on porosity, and the agreement is shown to be good.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347524
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  • 2
    Electronic Resource
    Electronic Resource
    Dynamic high-pressure properties of AlN ceramic as determined by flyer plate impact (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 167-171 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The dynamic properties of hot-pressed aluminum nitride ceramics were determined in a series of plate impact experiments using longitudinal and transverse in-material manganin gauges. The Hugoniot curve for hot pressed specimens was determined in the range of 0–190 kbar with a value of 94±2 kbar for the Hugoniot elastic limit (HEL). Using both gauge orientations, the stress deviator in the specimens was determined as the difference between longitudinal and transverse stresses. It was found that the stress deviator remains relatively constant above the HEL, and is about 10% higher than the value at the HEL point. The inferred Hugoniot converges to the extrapolation of the hydrostat. Since the convergence is not due to loss of strength, it may be due to a phase change in the AlN from low-pressure (wurtzite) structure to high-pressure (rocksalt) structure.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.350337
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  • 3
    Electronic Resource
    Electronic Resource
    Comment on "Thermal nonequilibrium of the shock-compressed state of polymers realized by 1 GPa shock waves" [J. Appl. Phys. 84, 6592 (1998)] (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 88 (2000), S. 2177-2178 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In a recent article, Nagayama and Mori [J. Appl. Phys. 84, 6592 (1998)] arrived at several conclusions concerning the thermodynamic nature of shock loaded plexiglass in the low stress range. Their departure point is the kink in the shock velocity-particle velocity curve for this material from which they obtain kinks in the temperature versus shock stress and Gruneisen parameter versus compression curves. These results are in sharp contrast with our conclusions concerning these entities which were published in the early 80's. Our experimental work relied on measuring the temperature of the shock loaded plexiglass using very thin copper thermistors embedded in the specimens. This technique and our main results are reviewed here. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1305901
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  • 4
    Electronic Resource
    Electronic Resource
    Dynamic uniaxial stress experiments on alumina with in-material Manganin gauges (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 5087-5088 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Rigid wall impact experiments were conducted on alumina tiles, instrumented with in-material Manganin gauges, in order to determine the magnitude of the dynamic yield strength of these ceramics. We found that the amplitude of the wave is very near the static yield strength. Thus, we conclude that these materials are not rate sensitive and that their increased strength in planar impact experiments is due to their pressure dependence rather than rate effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335292
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  • 5
    Electronic Resource
    Electronic Resource
    The pressure dependence of the yield strength of shock-loaded Manganin gauges (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 5084-5086 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The variation of the yield strength with shock pressure of Manganin foil gauges can be determined by analyzing their dynamic calibration curve. The analysis is based on the assumption that the material behaves as an elastoplastic work-hardening solid and on the general expression for the resistance change of Manganin which we derived in previous works. It is found that the strength increases by a factor of about 3.5 for shock stresses in the range of 0–160 kbar.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335291
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  • 6
    Electronic Resource
    Electronic Resource
    The use of strain gauges in the measurement of the B1/B2 phase transformation in shock-loaded potassium chloride (2000)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 2765-2768 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The shock induced phase transformation in potassium chloride (from the NaCl B1 structure to the CsCl B2 structure) has been investigated using constantan strain gauges. These gauges have been mounted in pressed, polycrystalline samples in an orientation that renders them sensitive to the uniaxial strain that characterizes the plate impact geometry. At the phase transformation stress (of ∼2 GPa), measured strains of ∼ −0.1 were observed, slightly higher than the values quoted in the literature. We suggested that residual porosity within the microstructure is a possible explanation. Over impact stresses of 2.5–4.0 GPa, total measured strains agree with the work of others at the lower end of our measured range, but are significantly lower at higher stresses. We suggest that this might be due to the nonequilibrium state of the material at the time of measurement. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.372253
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  • 7
    Electronic Resource
    Electronic Resource
    Comment on "Dynamic analysis of the response of lateral piezoresistance gauges in shocked ceramics" [J. Appl. Phys. 82, 2845 (1997)] and "Determination of lateral stresses in shocked solids: Simplified analysis of piezoresistance gauge data" [J. Appl. Phys. 83, 747 (1998)] (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 86 (1999), S. 3484-3486 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The issue of lateral stress measurements, with piezoresistance gauges, is discussed by Feng et al. [J. Appl. Phys. 82, 2845 (1997)] and Feng and Gupta [J. Appl. Phys. 83, 747 (1998)] using 2D numerical simulations. The purpose of this Comment is to highlight the difficulties with these simulations and to emphasize some of the results obtained in these articles, which strongly support our analytical approach to the subject. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.371238
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  • 8
    Electronic Resource
    Electronic Resource
    Failure in a shocked high-density glass (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 4328-4331 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: One of the outstanding questions concerning the compressive behavior of brittle materials concerns the failure wave observed in glasses. While much work has centered around relatively open structure, low density glasses such as borosilicate (pyrex) and soda-lime (float, which is partially filled), none has addressed the response of highly filled lead glasses. This work presents the results of a series of plate impact experiments carried out on the lead glass DEDF.TM This material was shocked in uniaxial strain and the longitudinal and lateral components of stress and strain were measured. The failure wave, observed in lower density glasses, was observed in this material but its velocity reached that of the shock at less than twice the Hugoniot elastic limit (HEL). © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.363382
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  • 9
    Electronic Resource
    Electronic Resource
    Comment on "Equation of state of aluminum nitride and its shock response'' [J. Appl. Phys. 76, 4077 (1994)] (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 78 (1995), S. 5854-5856 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A recent article by Dandekar, Abbate, and Frankel [J. Appl. Phys. 76, 4077 (1994)] reviews existing data on high-pressure properties of aluminum nitride (AlN) in an effort to build an equation of state for this material. A rather large portion of that article is devoted to the shear strength of AlN and, in particular, to our data of 1991 with longitudinal and lateral stress gauges [Z. Rosenberg, N. S. Brar, and S. J. Bless, J. Appl. Phys. 70, 167 (1991)]. Since our highest data point has an error of 1 GPa, much of the discussion and conclusions of Dandekar and co-workers are not relevant once this error in data reduction is corrected. We also discuss the relevance of our shear strength data for various issues, such as the phase transformation of AlN at 20 GPa and the general shape of Hugoniot curves for brittle solids. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359620
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  • 10
    Electronic Resource
    Electronic Resource
    Accounting for the Hugoniot elastic limits of polymers by using pressure-dependent yield criterion (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 1935-1936 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A factor of over 20 is measured between the Hugoniot elastic limits (HEL) of some polymers and their static shear strengths as measured under 1D stress conditions. This factor is too large to be accounted for by strain rate effects. In the present work we derive a new relation between the HEL and the shear strength which is based on a pressure-dependent yield criterion (like the Mohr–Coulomb criterion). The agreement between the experimental value for HEL of Plexiglas and its compressive yield strength is very good, strongly supporting our approach.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.357680
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