Evaluation of fracture toughness of MMC interfaces using thin-slice push-out tests

S. Mukherjee, C. R. Ananth, N. Chandra

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

A fracture mechanics based approach is used to compute residual and interfacial fracture energies of some MMC and CMC systems during push-out tests. The phenomenon of bottom debonding in MMC thin slice specimens is examined using experimental results and strain energy computations. Residual stress predictions are correlated with experimentally reported values. The main contribution to the interfacial fracture toughness in MMCs is found to be from the residual stresses and thus the values of Gir can be considered as a lower bound for the critical strain energy release rate of the interface Gic. This factor is also demonstrated in the push-out test simulations for pre-strained specimens, where in the absence of residual stresses, a far higher push-out load is necessary for the same critical strain energy release rate; consequently no fiber push-out is observed at lower loads. Interface fracture toughnesses for certain typical MMC and CMC systems are predicted using the developed methodology.

Original languageEnglish (US)
Pages (from-to)1333-1338
Number of pages6
JournalScripta Materialia
Volume36
Issue number11
DOIs
StatePublished - Jun 1 1997
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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