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  • 1
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    Grain-Size-Independent Plastic Flow at Ultrahigh Pressures and Strain Rates (2015)
    American Physical Society (APS)
    Details
    Publication Date: 2015-02-13
    Description: Author(s): H.-S. Park, R. E. Rudd, R. M. Cavallo, N. R. Barton, A. Arsenlis, J. L. Belof, K. J. M. Blobaum, B. S. El-dasher, J. N. Florando, C. M. Huntington, B. R. Maddox, M. J. May, C. Plechaty, S. T. Prisbrey, B. A. Remington, R. J. Wallace, C. E. Wehrenberg, M. J. Wilson, A. J. Comley, E. Giraldez, A. Nikroo, M. Farrell, G. Randall, and G. T. Gray, III A basic tenet of material science is that the flow stress of a metal increases as its grain size decreases, an effect described by the Hall-Petch relation. This relation is used extensively in material design to optimize the hardness, durability, survivability, and ductility of structural metals. Th... [Phys. Rev. Lett. 114, 065502] Published Thu Feb 12, 2015
    Keywords: Condensed Matter: Structure, etc.
    Print ISSN: 0031-9007
    Electronic ISSN: 1079-7114
    Topics: Physics
    Published by American Physical Society (APS)
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    PAPER CURRENT
  • 2
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    The acoustic radiation damping of the modes of a rectangular panel (1987)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The acoustic damping for single modes of a finite rectangular panel, simply supported in an infinite baffle, is theoretically determined from the ratio of the acoustic energy radiated per cycle to the vibratory energy of the panel. Asymptotic solutions for the low-frequency region are presented for a panel mode driven at an arbitrary frequency and for a panel mode vibrating at its natural frequency. Curves of acoustic damping for a panel mode vibrating at resonance, as a function of the panel thickness-to-length ratio, are presented for various panel aspect ratios. For panels vibrating below the critical frequency, the damping depends on the aspect ratio with square panels developing the smallest value. For panels vibrating above the critical frequency, the damping is nearly independent of the aspect ratio.
    Keywords: STRUCTURAL MECHANICS
    Type: Acoustical Society of America, Journal (ISSN 0001-4966); 81; 1787-179
    Format: text
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  • 3
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    Radiation resistance of a rectangular panel. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: The radiation resistance corresponding to the natural modes of a finite rectangular panel is theoretically determined from the total energy radiated to the farfield. The panel is assumed to be simply supported in an infinite baffle. Asymptotic solutions for the low-frequency region are derived, and curves covering the entire frequency range for various mode shapes and aspect ratios are obtained through numerical integration. When the ratio of the acoustic wavenumber to the panel wavenumber is a constant much less than unity, the radiation resistance for all modes is a minimum if the intranodal area (the area between adjacent node lines) is square, and increases with the aspect ratio of the intranodal area.
    Keywords: PHYSICS, GENERAL
    Type: Acoustical Society of America; vol. 51
    Format: text
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  • 4
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    Radiation resistance of a baffled beam. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: The radiation resistance of a beam is theoretically determined from the total acoustic power radiated into the farfield. The beam is supported in an infinite baffle, with both hinged and clamped supports considered. Asymptotic solutions are derived for frequencies well below the critical frequency. Curves, covering the entire frequency range between the low- and high-frequency asymptotic solutions, are obtained through numerical integration for the first ten modes of beams with various width-to-length ratios. For frequencies well below the critical frequency, the ratio of the radiation resistance of a beam clamped at each end to that of a beam hinged at each end is 0.851 for the first mode, 0.711 for the second mode, and asymptotically approaches 2 as the mode number tends to infinity. For both hinged and clamped supports, the radiation resistance of all modes increases with the beam width-to-length ratio.
    Keywords: PHYSICS, GENERAL
    Type: Acoustical Society of America; vol. 51
    Format: text
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  • 5
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    The acoustic damping of a rectangular panel (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Acoustic damping of clamped and hinged rectangular panel at natural frequency, noting dependence on aspect ratio
    Keywords: PHYSICS, GENERAL
    Type: SPRING MEETING ON THE ACOUSTIC DAMPING OF A RECTANGULAR PANEL; Apr 20, 1971 - Apr 23, 1971; WASHINGTON, DC
    Format: text
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