A unified scheme for dislocation-induced acoustic nonlinearity

Xiang Gao, Jianmin Qu

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

1 Scopus citations

Abstract

This study presents a unified approach to derive the acoustic nonlinearity parameter induced by dislocation motion in isotropic solids. It applies to various dislocation configurations, including dislocation strings (monopoles), dislocation dipoles, dislocation pileups and extended dislocations. The present approach reveals that the expressions of the acoustic nonlinearity parameters induced by such a variety of dislocation configurations share a common mathematical form. They are all scaled with (Lch/b)n, where Lch is a characteristic length of the dislocation configuration, b is the magnitude of the Burgers vector and n is either 3 or 4. Despite the dislocation density, semi-quantitative analysis demonstrates that the magnitude of acoustic nonlinearity parameters is dominated by the characteristic length of the dislocation configuration.

Original languageEnglish
Title of host publication45th Annual Review of Progress in Quantitative Nondestructive Evaluation, Volume 38
EditorsSimon Laflamme, Stephen Holland, Leonard J. Bond
ISBN (Electronic)9780735418325
DOIs
StatePublished - 8 May 2019
Event45th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2018 - Burlington, United States
Duration: 15 Jul 201819 Jul 2018

Publication series

NameAIP Conference Proceedings
Volume2102
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference45th Annual Review of Progress in Quantitative Nondestructive Evaluation, QNDE 2018
Country/TerritoryUnited States
CityBurlington
Period15/07/1819/07/18

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