Fracture analysis of dental composites

R. M.V. Pidaparti, W. A. Boehmer, M. W. Beatty

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Three dental composite materials were tested in three-point bending to determine fracture toughness using the stress intensity factor approach. Finite element analysis was used to model the specimens and the fracture toughness was calculated using the J integral and crack closure methods. The effects of tension, compression, and tension-compression moduli on the fracture toughness are presented and discussed. For each material, the plain strain J integral results were independent of Young's modulus. Crack closure results were found to be very sensitive to the type of mesh used to define the Δa a ratio at the crack tip. The results from J integral and crack closure methods were in good agreement with experimental data for the three dental composites considered.

Original languageEnglish (US)
Pages (from-to)51-59
Number of pages9
JournalEngineering Fracture Mechanics
Volume45
Issue number1
DOIs
StatePublished - May 1993

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ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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