Localizing nonclassical nonlinearity in geological materials with neutron scattering experiments

Timothy W. Darling, James A. TenCate, Sven Vogel, Thomas Proffen, Katie Page, Christine Herrera, Aaron M. Covington, Erik Emmons

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Scopus citations

Abstract

Deviations from linear elasticity in consolidated rocks have been measured by acoustic methods and by quasistatic application of stress since the early 1900s. We have used elastic neutron scattering to probe a large volume (on a grain-size scale) of a variety of consolidated rocks under dynamic and quasi-static conditions. Differences between macroscopic external strain and average atomic-scale strain were determined. Nonlinear behavior is intimately related to strain magnitudes so the microscopic distribution of strain is important. Our results indicate that a very small volume (< 5%) of the rock is responsible for almost all of the nonlinear response of the bulk rock. We discuss our results and possible future experiments.

Original languageEnglish
Title of host publicationINNOVATIONS IN NONLINEAR ACOUSTICS - ISNA 17
Subtitle of host publication17th International Symposium on Nonlinear Acoustics including the International Sonic Boom Forum
Pages19-26
Number of pages8
DOIs
StatePublished - 2006
Externally publishedYes
EventINNOVATIONS IN NONLINEAR ACOUSTICS - ISNA17: 17th International Symposium on Nonlinear Acoustics including the International Sonic Boom Forum - State College, PA, United States
Duration: Jul 18 2005Jul 22 2005

Publication series

NameAIP Conference Proceedings
Volume838
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceINNOVATIONS IN NONLINEAR ACOUSTICS - ISNA17: 17th International Symposium on Nonlinear Acoustics including the International Sonic Boom Forum
Country/TerritoryUnited States
CityState College, PA
Period07/18/0507/22/05

Keywords

  • Hysteresis
  • Neutron scattering
  • Nonclassical
  • Nonlinear
  • Rocks

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