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Crack growth across a strength mismatched bimaterial interface
Luleå tekniska universitet.
Luleå tekniska universitet.
Luleå tekniska universitet.
1998 (English)In: International Journal of Fracture, ISSN 0376-9429, E-ISSN 1573-2673, Vol. 89, no 3, p. 223-243Article in journal (Refereed) Published
Abstract [en]

Crack growth across an interface between materials with different strength is examined by a cohesive zone model. The two materials have identical elastic properties but different fracture process properties, or different yield stresses, which is modeled by different cohesive stresses. The fracture criteria is a critical crack opening displacement. Load is represented by a stress intensity factor defining a remote square root singular stress field. The results show that the ratio between the cohesive stresses of the two materials primarily determines the behavior of the critical stress intensity factor. When the crack approaches a material with a higher cohesive stress the crack tip is shielded, but if the crack approaches a material with smaller critical crack opening displacement the maximum level of shielding is determined by the ratio between the critical crack opening displacements. When a crack approaches a material with a lower cohesive stress it is exposed to all amplified load

Place, publisher, year, edition, pages
1998. Vol. 89, no 3, p. 223-243
National Category
Applied Mechanics
Research subject
Solid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-6543DOI: 10.1023/A:1007493028039ISI: 000076953100002Local ID: 4c55c670-fbe3-11dc-a946-000ea68e967bOAI: oai:DiVA.org:ltu-6543DiVA, id: diva2:979429
Note
Godkänd; 1998; 20080327 (cira)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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