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Article: Magnetoelastic fracture of soft ferromagnetic materials

TitleMagnetoelastic fracture of soft ferromagnetic materials
Authors
KeywordsAn elliptical crack
Fracture toughness
Magnetoelastic
Magnetostriction
Small-scale magnetic-yielding
Issue Date2004
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/tafmec
Citation
Theoretical And Applied Fracture Mechanics, 2004, v. 42 n. 3, p. 317-334 How to Cite?
AbstractEffects of magnetic field on fracture toughness of soft ferromagnetic materials were studied using experimental techniques and theoretical models. The manganese-zinc ferrite with a single-edge-notch-beam (SENB) were chosen to be the specimen and the Vickers' indentation specimen subjected to a magnetic field were chosen to be the specimens. Results indicate that there is no significant variations of the measured fracture toughness of the manganese-zinc ferrite ceramic in the presence of the magnetic field. The theoretical model involves an anti-plane shear crack with finite length in an infinite magnetostrictive body where an in-plane magnetic field prevails at infinity. Magnetoelasticity is used. The crack-tip elastic field is different from that of the classical mode III fracture problem. Furthermore, the magnetoelastic fracture of the soft ferromagnetic material was studied by solving the stress field for a soft ferromagnetic plane with a center-through elliptical crack. The stress field at the tip of a slender elliptical crack is obtained for which only external magnetic field normal to the major axis of the ellipse is applied at infinity. The results indicate that the near field stresses are governed by the magnetostriction and permeability of the soft ferromagnetic material. The induction magnetostrictive modulus is a key parameter for finding whether magnetostriction or magnetic-force-induced deformation is dominant near the front an elliptically-shaped crack. The influence of the magnetic field on the apparent toughness of a soft ferromagnetic material with a crack-like flaw can be regarded approximately in two ways: one possesses a large induction magnetostrictive modulus and the other has a small modulus. Finally, a small-scale magnetic-yielding model was developed on the basis of linear magnetization to interpret the experimental results related to the fracture of the manganese-zinc ferrite ceramics under magnetic field. Studied also is the fracture test of the soft ferromagnetic steel with compact tension specimens published in the existing literature. © 2004 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/75747
ISSN
2015 Impact Factor: 2.025
2015 SCImago Journal Rankings: 0.835
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorFang, DNen_HK
dc.contributor.authorWan, YPen_HK
dc.contributor.authorSoh, AKen_HK
dc.date.accessioned2010-09-06T07:14:10Z-
dc.date.available2010-09-06T07:14:10Z-
dc.date.issued2004en_HK
dc.identifier.citationTheoretical And Applied Fracture Mechanics, 2004, v. 42 n. 3, p. 317-334en_HK
dc.identifier.issn0167-8442en_HK
dc.identifier.urihttp://hdl.handle.net/10722/75747-
dc.description.abstractEffects of magnetic field on fracture toughness of soft ferromagnetic materials were studied using experimental techniques and theoretical models. The manganese-zinc ferrite with a single-edge-notch-beam (SENB) were chosen to be the specimen and the Vickers' indentation specimen subjected to a magnetic field were chosen to be the specimens. Results indicate that there is no significant variations of the measured fracture toughness of the manganese-zinc ferrite ceramic in the presence of the magnetic field. The theoretical model involves an anti-plane shear crack with finite length in an infinite magnetostrictive body where an in-plane magnetic field prevails at infinity. Magnetoelasticity is used. The crack-tip elastic field is different from that of the classical mode III fracture problem. Furthermore, the magnetoelastic fracture of the soft ferromagnetic material was studied by solving the stress field for a soft ferromagnetic plane with a center-through elliptical crack. The stress field at the tip of a slender elliptical crack is obtained for which only external magnetic field normal to the major axis of the ellipse is applied at infinity. The results indicate that the near field stresses are governed by the magnetostriction and permeability of the soft ferromagnetic material. The induction magnetostrictive modulus is a key parameter for finding whether magnetostriction or magnetic-force-induced deformation is dominant near the front an elliptically-shaped crack. The influence of the magnetic field on the apparent toughness of a soft ferromagnetic material with a crack-like flaw can be regarded approximately in two ways: one possesses a large induction magnetostrictive modulus and the other has a small modulus. Finally, a small-scale magnetic-yielding model was developed on the basis of linear magnetization to interpret the experimental results related to the fracture of the manganese-zinc ferrite ceramics under magnetic field. Studied also is the fracture test of the soft ferromagnetic steel with compact tension specimens published in the existing literature. © 2004 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/tafmecen_HK
dc.relation.ispartofTheoretical and Applied Fracture Mechanicsen_HK
dc.rightsTheoretical and Applied Fracture Mechanics. Copyright © Elsevier BV.en_HK
dc.subjectAn elliptical cracken_HK
dc.subjectFracture toughnessen_HK
dc.subjectMagnetoelasticen_HK
dc.subjectMagnetostrictionen_HK
dc.subjectSmall-scale magnetic-yieldingen_HK
dc.titleMagnetoelastic fracture of soft ferromagnetic materialsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0167-8442&volume=42&issue=3&spage=317&epage=334&date=2004&atitle=Magnetoelastic+fracture+of+soft+ferromagnetic+materialsen_HK
dc.identifier.emailSoh, AK:aksoh@hkucc.hku.hken_HK
dc.identifier.authoritySoh, AK=rp00170en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.tafmec.2004.09.006en_HK
dc.identifier.scopuseid_2-s2.0-10244235318en_HK
dc.identifier.hkuros98349en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-10244235318&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume42en_HK
dc.identifier.issue3en_HK
dc.identifier.spage317en_HK
dc.identifier.epage334en_HK
dc.identifier.isiWOS:000226044400006-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridFang, DN=7202133612en_HK
dc.identifier.scopusauthoridWan, YP=7402417351en_HK
dc.identifier.scopusauthoridSoh, AK=7006795203en_HK

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