From local to global measurements of nonclassical nonlinear elastic effects in geomaterials

Journal Article · Wed Sep 07 00:00:00 EDT 2016 · Journal of the Acoustical Society of America

DOI:https://doi.org/10.1121/1.4962373· OSTI ID:1407872

Lott, Martin ^[1]; Remillieux, Marcel C.  ^[2]; Le Bas, Pierre-Yves ^[2]; Ulrich, T. J. ^[2]; Garnier, Vincent ^[1]; Payan, Cédric ^[1]

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1. Aix-Marseille Univ., and CNRS/LMA/UPR, Marseille (France)
2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Here, the equivalence between local and global measures of nonclassical nonlinear elasticity is established in a slender resonant bar. Nonlinear effects are first measured globally using nonlinear resonance ultrasound spectroscopy (NRUS), which monitors the relative shift of the resonance frequency as a function of the maximum dynamic strain in the sample. Subsequently, nonlinear effects are measured locally at various positions along the sample using dynamic acousto elasticity testing (DAET). Finally, after correcting analytically the DAET data for three-dimensional strain effects and integrating numerically these corrected data along the length of the sample, the NRUS global measures are retrieved almost exactly.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE Office of Fossil Energy (FE)
• Grant/Contract Number: AC52-06NA25396
• OSTI ID: 1407872
• Report Number(s): LA-UR-16-23114
• Journal Information: Journal of the Acoustical Society of America, Vol. 140, Issue 3; ISSN 0001-4966
• Publisher: Acoustical Society of America
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
Earth Sciences
nonlinear elasticity
dynamic acoustoelasticity
nonlinear resonant ultrasound spectroscopy
geomaterials