A numerical study of crack shielding and deﬂection under extensive plasticity
Burke-Veliz, Allan, Reed, Philippa A.S. and Syngellakis, Stavros (2009) A numerical study of crack shielding and deﬂection under extensive plasticity. Engineering Fracture Mechanics, 76, (9), 1345-1356. (doi:10.1016/j.engfracmech.2009.02.003).
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Experimentally observed crack deﬂection events in multi-layered material systems, occurring even under pure mode-I loading, are here simulated and explained through elasto-plastic ﬁnite element modelling. The crack tip opening displacement is adopted as the
crack driving force and estimated along crack paths whose deﬂection is predicted using the maximum tangential strain criterion. Shielding conditions that promote deﬂection and bifurcation are evaluated. It is shown that, under conditions of extended plasticity, CTOD evolution as a crack approaches an interface can reveal crack shielding and ampliﬁcation, and that crack deﬂection and growth can be assessed from the variation of tangential strains around the crack tip.
|Keywords:||multi-layered systems, crack deﬂection, crack path bifurcation, crack growth, plasticity, finite element analysis|
|Subjects:||T Technology > TJ Mechanical engineering and machinery
Q Science > QA Mathematics > QA75 Electronic computers. Computer science
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
University Structure - Pre August 2011 > School of Engineering Sciences > Computational Engineering and Design
|Date Deposited:||10 Jun 2009|
|Last Modified:||27 Mar 2014 18:47|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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