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Author: sudook kim

Displaying records 31 to 38.
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31. Elastic Coefficients of Monocrystal Gelena (Pbs)
Published: Date unknown
Authors: Sudook A Kim, H M Ledbetter
Abstract: Using acoustic-resonance spectroscopy, we measured the three independent Voigt C^dkj^ (C^d11^, C^d12^, C^d44^) of cubic-symmetry galena (lead sulphide). Our results clarify the discrepancies of previous reports. We report also the internal friction ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851219

32. Elastic Stiffnesses and Internal Frictions of Monocrystal Quartz
Published: Date unknown
Authors: H M Ledbetter, Sudook A Kim, M Lei
Abstract: Using acoustic-resonance spectroscopy (with only two point contacts with the specimen), we measured both the real and imaginary parts of the elastic-stiffness tensor C^dij^ of a cultured quartz monocrystal. With trigonal symmetry (32 point group, P3 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851195

33. Elastic-Stiffness Coefficients of Titanium Diboride
Series: Journal of Research (NIST JRES)
Published: Date unknown
Authors: H M Ledbetter, Sudook A Kim, T Tanaka
Abstract: Using acoustic-resonance spectroscopy, we measured the monocrystal elastic-stiffness coefficients, the Voigt Cij, of TiB^d2^. With hexagonal symmentry, TiB^d2^ exhibits five independent C^dij^: C^d11^, C^d33^, C^d44^, C^d66^, C^d13^. Using Voigt-Re ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851196

34. Internal Friction Tensor in Langasite (LA^d3^Ga^d5^SiO^d14^)
Published: Date unknown
Authors: H M Ledbetter, Sudook A Kim
Abstract: Using acoustic spectroscopy, we measured the complete elastic-constant and internal-friction tensor C^dy^ = C^dy^ (1+Q^u-1^^dy^) of langasite, a trigonal-symmetry piezoelectric. To understand the internal friction, we need a mechanism that explains, ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851295

35. Monocrystal Elastic Constants and Deprived Properties of the Cubic and the Hexangonal Elements
Published: Date unknown
Authors: H M Ledbetter, Sudook A Kim
Abstract: For forty-one cubic symmetry elements and twenty-one hexagonal-symmetry elements, we give the complete monocrystal elastic-stiffness tensor C^dijkl.^ and the mass densities, we derived other useful physical properties. First, we derived the elastic ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=853025

36. The Internal-Friction Tensor Q-1^diJ^
Published: Date unknown
Authors: Paul R Heyliger, H M Ledbetter, Sudook A Kim
Abstract: oustic-resonance spectroscopy enables obtaining the complete elastic-stiffness tensor C^dy^ in one measurement of the macroscopic-vibration frequencies of a regular-shape solid. Because the total elastic stiffness C^dy^ contains both real and imagi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851246

37. Titanium's b.c.c. Monocrystal Elastic Constants
Published: Date unknown
Author: Sudook A Kim
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851355

38. Young Modulus of a thin plate in the through-thickness direction
Published: Date unknown
Authors: Sudook A Kim, H M Ledbetter
Abstract: We give a new approach to obtain the through-thickness-direction along the Young modulus of a thin orthotropic plate. The method minimizes errors because eight of nine measurments are made along principal directions. To verify the method, we used a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851226



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