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Acoustic Nonlinearity Parameters Due to Microstructural Defects

Acoustic Nonlinearity Parameters Due to Microstructural Defects Abstract This study presents a general approach to derive the acoustic nonlinearity parameters induced by various types of dislocation configurations including dislocation strings (monopoles), dislocation dipoles, dislocation pileups and extended dislocations. It is found that expressions of the acoustic nonlinearity parameter induced by such a variety of dislocation configurations share a common mathematical form. They are all scaled with \(\left( {L_{\mathrm{ch}} /b} \right) ^{n}\), where \(L_{\mathrm{ch}} \) is a characteristic length of the dislocation configuration, b is the magnitude of the Burgers vector, and n is either 3 or 4. Semiquantitative analysis is presented to compare the magnitudes of the acoustic nonlinearity parameters among different types of dislocation configurations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Acta Mechanica Solida Sinica" Springer Journals

Acoustic Nonlinearity Parameters Due to Microstructural Defects

"Acta Mechanica Solida Sinica" , Volume 31 (5): 10 – Oct 1, 2018

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References (31)

Publisher
Springer Journals
Copyright
2018 The Chinese Society of Theoretical and Applied Mechanics
ISSN
0894-9166
eISSN
1860-2134
DOI
10.1007/s10338-018-0053-3
Publisher site
See Article on Publisher Site

Abstract

Abstract This study presents a general approach to derive the acoustic nonlinearity parameters induced by various types of dislocation configurations including dislocation strings (monopoles), dislocation dipoles, dislocation pileups and extended dislocations. It is found that expressions of the acoustic nonlinearity parameter induced by such a variety of dislocation configurations share a common mathematical form. They are all scaled with \(\left( {L_{\mathrm{ch}} /b} \right) ^{n}\), where \(L_{\mathrm{ch}} \) is a characteristic length of the dislocation configuration, b is the magnitude of the Burgers vector, and n is either 3 or 4. Semiquantitative analysis is presented to compare the magnitudes of the acoustic nonlinearity parameters among different types of dislocation configurations.

Journal

"Acta Mechanica Solida Sinica"Springer Journals

Published: Oct 1, 2018

Keywords: Theoretical and Applied Mechanics; Surfaces and Interfaces, Thin Films; Classical Mechanics

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