Non-coherent energetic interfaces accounting for degradation

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dc.citation.epage383en_US
dc.citation.issueNumber3en_US
dc.citation.spage361en_US
dc.citation.volumeNumber59en_US
dc.contributor.authorEsmaeili, A.en_US
dc.contributor.authorSteinmann, P.en_US
dc.contributor.authorJavili, A.en_US
dc.date.accessioned2018-04-12T10:37:42Z
dc.date.available2018-04-12T10:37:42Z
dc.date.issued2017en_US
dc.departmentDepartment of Mechanical Engineeringen_US
dc.description.abstractWithin the continuum mechanics framework, there are two main approaches to model interfaces: classical cohesive zone modeling (CZM) and interface elasticity theory. The classical CZM deals with geometrically non-coherent interfaces for which the constitutive relation is expressed in terms of traction–separation laws. However, CZM lacks any response related to the stretch of the mid-plane of the interface. This issue becomes problematic particularly at small scales with increasing interface area to bulk volume ratios, where interface elasticity is no longer negligible. The interface elasticity theory, in contrast to CZM, deals with coherent interfaces that are endowed with their own energetic structures, and thus is capable of capturing elastic resistance to tangential stretch. Nonetheless, the interface elasticity theory suffers from the lack of inelastic material response, regardless of the strain level. The objective of this contribution therefore is to introduce a generalized mechanical interface model that couples both the elastic response along the interface and the cohesive response across the interface whereby interface degradation is taken into account. The material degradation of the interface mid-plane is captured by a non-local damage model of integral-type. The out-of-plane decohesion is described by a classical cohesive zone model. These models are then coupled through their corresponding damage variables. The non-linear governing equations and the weak forms thereof are derived. The numerical implementation is carried out using the finite element method and consistent tangents are derived. Finally, a series of numerical examples is studied to provide further insight into the problem and to carefully elucidate key features of the proposed theory. © 2016, Springer-Verlag Berlin Heidelberg.en_US
dc.description.provenanceMade available in DSpace on 2018-04-12T10:37:42Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 179475 bytes, checksum: ea0bedeb05ac9ccfb983c327e155f0c2 (MD5) Previous issue date: 2017en
dc.identifier.doi10.1007/s00466-016-1342-7en_US
dc.identifier.eissn1432-0924
dc.identifier.issn0178-7675
dc.identifier.urihttp://hdl.handle.net/11693/36369
dc.language.isoEnglishen_US
dc.publisherSpringer Verlagen_US
dc.relation.isversionofhttp://dx.doi.org/10.1007/s00466-016-1342-7en_US
dc.source.titleComputational Mechanicsen_US
dc.subjectCohesive zoneen_US
dc.subjectGeneralized interfacesen_US
dc.subjectInterface elasticityen_US
dc.subjectNano-materialsen_US
dc.subjectNon-local damageen_US
dc.subjectSize effecten_US
dc.titleNon-coherent energetic interfaces accounting for degradationen_US
dc.typeArticleen_US

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