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Article: Effect of magnetostriction on fracture of a soft ferromagnetic medium with a crack-like flaw

TitleEffect of magnetostriction on fracture of a soft ferromagnetic medium with a crack-like flaw
Authors
KeywordsCrack-like flaw
Magnetic force
Magnetostriction
Soft ferromagnetic materials
Issue Date2003
PublisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/FFE
Citation
Fatigue And Fracture Of Engineering Materials And Structures, 2003, v. 26 n. 11, p. 1091-1102 How to Cite?
AbstractThe magnetic-induction field in the vicinity of an elliptical inclusion embedded in an infinite soft ferromagnetic medium is determined based on complex potential theory. By using a constitutive relation of magnetostriction for isotropic materials, the stress field in the vicinity of an elliptical flaw is obtained. Furthermore, the stress field at the tip of a slender elliptical crack is determined for the case in which only an external magnetic field perpendicular to the major axis of the ellipse is applied at infinity. The results indicate that the stress field in the neighbourhood of the tip is governed by the magnetostriction and permeability of the soft ferromagnetic material. The induction magnetostrictive modulus is a key parameter in determining which of the two mechanisms, i.e., magnetostriction and magnetic-force-induced deformation, is dominant in determining the stress field in the neighbourhood of the tip of a crack-like flaw. With regard to the influence of the magnetic field on the apparent toughness of a soft ferromagnetic body with a crack-like flaw, soft ferromagnetic materials can be roughly divided into two categories: one possesses a large induction magnetostrictive modulus and the other has a small modulus. An approximate criterion for categorizing the materials is presented. For the benefit of engineering design, the expressions of the stress-intensity factor for these two categories of soft ferromagnetic materials are presented. The results show that the stress-intensity factor is affected not only by the flaw geometry, but also by the permeability of the medium inside the flaw.
Persistent Identifierhttp://hdl.handle.net/10722/75674
ISSN
2015 Impact Factor: 1.838
2015 SCImago Journal Rankings: 1.185
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWan, YPen_HK
dc.contributor.authorFang, DNen_HK
dc.contributor.authorSoh, AKen_HK
dc.contributor.authorHwang, KCen_HK
dc.date.accessioned2010-09-06T07:13:28Z-
dc.date.available2010-09-06T07:13:28Z-
dc.date.issued2003en_HK
dc.identifier.citationFatigue And Fracture Of Engineering Materials And Structures, 2003, v. 26 n. 11, p. 1091-1102en_HK
dc.identifier.issn8756-758Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/75674-
dc.description.abstractThe magnetic-induction field in the vicinity of an elliptical inclusion embedded in an infinite soft ferromagnetic medium is determined based on complex potential theory. By using a constitutive relation of magnetostriction for isotropic materials, the stress field in the vicinity of an elliptical flaw is obtained. Furthermore, the stress field at the tip of a slender elliptical crack is determined for the case in which only an external magnetic field perpendicular to the major axis of the ellipse is applied at infinity. The results indicate that the stress field in the neighbourhood of the tip is governed by the magnetostriction and permeability of the soft ferromagnetic material. The induction magnetostrictive modulus is a key parameter in determining which of the two mechanisms, i.e., magnetostriction and magnetic-force-induced deformation, is dominant in determining the stress field in the neighbourhood of the tip of a crack-like flaw. With regard to the influence of the magnetic field on the apparent toughness of a soft ferromagnetic body with a crack-like flaw, soft ferromagnetic materials can be roughly divided into two categories: one possesses a large induction magnetostrictive modulus and the other has a small modulus. An approximate criterion for categorizing the materials is presented. For the benefit of engineering design, the expressions of the stress-intensity factor for these two categories of soft ferromagnetic materials are presented. The results show that the stress-intensity factor is affected not only by the flaw geometry, but also by the permeability of the medium inside the flaw.en_HK
dc.languageengen_HK
dc.publisherBlackwell Publishing Ltd. The Journal's web site is located at http://www.blackwellpublishing.com/journals/FFEen_HK
dc.relation.ispartofFatigue and Fracture of Engineering Materials and Structuresen_HK
dc.rightsFatigue & Fracture of Engineering Materials and Structures. Copyright © Blackwell Publishing Ltd.en_HK
dc.subjectCrack-like flawen_HK
dc.subjectMagnetic forceen_HK
dc.subjectMagnetostrictionen_HK
dc.subjectSoft ferromagnetic materialsen_HK
dc.titleEffect of magnetostriction on fracture of a soft ferromagnetic medium with a crack-like flawen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=8756-758X&volume=26&issue=11&spage=1091&epage=1102&date=2003&atitle=Effect+of+magnetostriction+on+fracture+of+a+soft+ferromagnetic+medium+with+a+crack-like+flawen_HK
dc.identifier.emailSoh, AK:aksoh@hkucc.hku.hken_HK
dc.identifier.authoritySoh, AK=rp00170en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1046/j.1460-2695.2003.00707.xen_HK
dc.identifier.scopuseid_2-s2.0-0344896843en_HK
dc.identifier.hkuros88992en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0344896843&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume26en_HK
dc.identifier.issue11en_HK
dc.identifier.spage1091en_HK
dc.identifier.epage1102en_HK
dc.identifier.isiWOS:000186258400006-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridWan, YP=7402417351en_HK
dc.identifier.scopusauthoridFang, DN=7202133612en_HK
dc.identifier.scopusauthoridSoh, AK=7006795203en_HK
dc.identifier.scopusauthoridHwang, KC=7402426543en_HK

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