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Crack initiation direction from interface of bonded dissimilar media

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dc.contributor.author Spyropoulos, CP en
dc.date.accessioned 2014-03-01T01:18:48Z
dc.date.available 2014-03-01T01:18:48Z
dc.date.issued 2003 en
dc.identifier.issn 0167-8442 en
dc.identifier.uri http://hdl.handle.net/123456789/15206
dc.subject a priori knowledge en
dc.subject Crack Initiation en
dc.subject Density Functional en
dc.subject Elastic Moduli en
dc.subject Interface Crack en
dc.subject Fixed Ratio en
dc.subject Strain Energy Density en
dc.subject.classification Engineering, Mechanical en
dc.subject.classification Mechanics en
dc.subject.other Aluminum en
dc.subject.other Crack initiation en
dc.subject.other Debonding en
dc.subject.other Elastic moduli en
dc.subject.other Stresses en
dc.subject.other Biaxial load factor en
dc.subject.other Fracture en
dc.subject.other crack initiation en
dc.subject.other fracture mechanics en
dc.subject.other crack en
dc.subject.other fracture initiation en
dc.subject.other fracture mechanics en
dc.title Crack initiation direction from interface of bonded dissimilar media en
heal.type journalArticle en
heal.identifier.primary 10.1016/S0167-8442(02)00141-6 en
heal.identifier.secondary http://dx.doi.org/10.1016/S0167-8442(02)00141-6 en
heal.language English en
heal.publicationDate 2003 en
heal.abstract Debonded region of an interface between two dissimilar materials are modeled as a line crack that tends to enhance the initiation of failure by fracture. Depending on the load that interacts with dissimilar materials, no a priori knowledge of how failure would initiate from an existing interface crack is assumed. By application of the strain energy density criterion, potential crack initiation sites are obtained for different biaxial loading states and materials with dissimilar properties. Numerical results are obtained for an epoxy/aluminum medium. In each case, a finite line segment of debonding is assumed. Uniform stresses are applied normal and parallel to the interface so that a biaxial load factor k determines the relative magnitude of biaxiality. Positive and negative k correspond, respectively, to applied tension and compression parallel to the interface. For a fixed ratio of the elastic moduli, crack initiation angles measured from the interface would increase with positive k and decrease with an increase of negative k. These findings are presented for different values of k. The direction of maximum yield initiation could also be determined from the stationary values of the strain density function. These locations are identified with elements that undergo excessive distortion while the possible fracture sites are assumed to coincide with regions where dilatational effects would dominate. (C) 2003 Elsevier Science Ltd. All rights reserved. en
heal.publisher ELSEVIER SCIENCE BV en
heal.journalName Theoretical and Applied Fracture Mechanics en
dc.identifier.doi 10.1016/S0167-8442(02)00141-6 en
dc.identifier.isi ISI:000180239700008 en
dc.identifier.volume 39 en
dc.identifier.issue 1 en
dc.identifier.spage 99 en
dc.identifier.epage 105 en


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