Magnetoelastic interactions in a cracked ferromagnetic body

被引：1

作者：

Harutyunyan, S. ^{[1
]}

Reynolds, W. T., Jr. ^{[1
]}

Hasanyan, D. J. ^{[2
]}

机构：

[1] Virginia Polytech Inst & State Univ, Dept Mat Sci & Engn, Blacksburg, VA 24061 USA

[2] Natl Acad Sci Armenia, Inst Mech, Yerevan 0019, Armenia

来源：

ACTA MATERIALIA | 2008年 / 56卷 / 17期

基金：

美国国家科学基金会;

关键词：

Magnetoelasticity; Ferromagnetic; Nonlinear magnetization; Moving crack;

D O I：

10.1016/j.actamat.2008.05.022

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The stress-strain state associated with a moving crack in a ferromagnetic material is investigated. The model considers a soft magnetic ferroelastic body and incorporates a realistic (nonlinear) susceptibility. The moving crack propagates in a direction perpendicular to the magnetic field. A closed-form solution yields the magnetoelastic stresses and a stress intensity factor. An applied magnetic field makes the stress intensity factor depend upon the crack velocity. The nonlinear susceptibility produces a completely different magnetoelastic stress state than a constant susceptibility, and the stress intensity is highly sensitive to material properties. The stresses around the crack are largely insensitive to the external magnetic field and crack speed except at critical combinations for which the stresses are singular. Some combinations of magnetic field and crack velocity cause the stress components ahead of the crack tip to change sign. (C) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：4673 / 4681

页数：9

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