Interface fracture analses of a bicrystal specimen using cohesive modelling approach

Muhammad Amir, Siegfried Schmauder

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


The present paper examines the interface fracture of a bicrystal
niobium/alumina specimen using a cohesive modelling approach. Crystal
plasticity theory has been used to model the single crystalline niobium. The
effect of different cohesive law parameters, such as cohesive strength and work
of adhesion, has been studied. The cohesive strength is found to have a profound
effect on the crack growth resistance and fracture energies as compared with the
work of adhesion. The cohesive model parameters are identified by validating
the finite element analyses results with experiments. Theoretical interlink
between the local adhesion capacity and macroscopic fracture energies has been
analysed. The results presented in this work provide an insight into the role
of cohesive strength and the work of adhesion in macroscopic fracture is also
presented which can be used by experimentalists to design better bimaterials
by varying the cohesive strength and the work of adhesion.
Original languageEnglish
Pages (from-to)1015-1030
Number of pages16
JournalModelling and Simulation in Materials Science and Engineering
Issue number6
Publication statusPublished - 2006


  • cohesive modelling approach
  • adhesion
  • cohesive
  • crystal plasticity theory


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