Fracture analysis of dental composites

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

doi:10.1016/0013-7944(93)90007-F

Fracture analysis of dental composites

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

Research output: Contribution to journal › Article › peer-review

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 language	English (US)
Pages (from-to)	51-59
Number of pages	9
Journal	Engineering Fracture Mechanics
Volume	45
Issue number	1
DOIs	https://doi.org/10.1016/0013-7944(93)90007-F
State	Published - May 1993

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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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.",

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AU - Pidaparti, R. M.V.

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AU - Beatty, M. W.

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Y1 - 1993/5

N2 - 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.

AB - 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.

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Fracture analysis of dental composites

Abstract

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