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Fracture analysis of dental composites

✍ Scribed by R.M.V. Pidaparti; W.A. Boehmer; M.W. Beatty

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 650 KB
Volume: 45
Category: Article
ISSN: 0013-7944
DOI: 10.1016/0013-7944(93)90007-f

No coin nor oath required. For personal study only.

✦ Synopsis

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 Au/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.

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