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A crack perpendicular to a bimaterial interface an interface in finite solid
Ansvarig organisation
2003 (Engelska)Ingår i: International Journal of Solids and Structures, ISSN 0020-7683 , Vol. 40, nr 11, s. 2731-55Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The dislocation simulation method is used in this paper to derive the basic equations for a crack perpendicular to the bimaterial interface in a finite solid. The complete solutions to the problem, including the T stress and the stress intensity factors are obtained. The stress field characteristics are investigated in detail. It is found that when the crack is within a weaker material, the stress intensity factor is smaller than that in a homogeneous material and it decreases when the distance between the crack tip and interface decreases. When the crack is within a stiffer material, the stress intensity factor is larger than that in a homogeneous material and it increases when the distance between the crack tip and interface decreases. In both cases, the stress intensity factor will increase when the ratio of the size of a sample to the crack length decreases. A comparison of stress intensity factors between a finite problem and an infinite problem has been given also. The stress distribution ahead of the crack tip, which is near the interface, is shown in details and the T stress effect is considered.

Ort, förlag, år, upplaga, sidor
Elsevier, UK , 2003. Vol. 40, nr 11, s. 2731-55
Nyckelord [en]
crack-edge stress field analysis, edge dislocations, interface structure, internal stresses
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Teknisk mekanik
Identifikatorer
URN: urn:nbn:se:bth-9967DOI: 10.1016/S0020-7683(03)00087-8ISI: 000182889200007Lokalt ID: oai:bth.se:forskinfo5F9CF90752EC4A48C1256E28003903C1OAI: oai:DiVA.org:bth-9967DiVA, id: diva2:837972
Tillgänglig från: 2012-09-18 Skapad: 2004-01-27 Senast uppdaterad: 2015-06-30Bibliografiskt granskad

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