Effects of loading rate on the deformation and cracking of dental multilayers : Experiments and models
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
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Pages (from-to) | 970-975 |
Journal / Publication | Journal of Materials Research |
Volume | 21 |
Issue number | 4 |
Publication status | Published - Apr 2006 |
Externally published | Yes |
Link(s)
Abstract
The paper presents the results of combined experimental, analytical, and computational studies of contact-induced deformation and cracking in dental multilayers. These include studies of individual layers and composite structures that consist of tri-layers of glass bonded to ceramic-filled polymer foundation with an acrylate-based join material. Loading-rate-dependent Young's moduli of the join and foundation materials were obtained from monotonic compression tests. Critical loads were also determined for the tri-layers from Hertzian contact tests at different loading rates. The fracture onset (sub-surface radial cracking) was detected using an in situ telescope. The measured rate-dependent Young's moduli were then incorporated into a finite element model that was used to predict the rate-dependent critical loads in the tri-layer system. Finally, the paper shows that the observed loading rate-dependence of the critical load (for radial cracking) is due to the combined effects of slow crack growth in glass and rate-dependent Young's moduli in the join and foundation layers. © 2006 Materials Research Society.
Citation Format(s)
Effects of loading rate on the deformation and cracking of dental multilayers: Experiments and models. / Niu, Xinrui; Soboyejo, Wole.
In: Journal of Materials Research, Vol. 21, No. 4, 04.2006, p. 970-975.
In: Journal of Materials Research, Vol. 21, No. 4, 04.2006, p. 970-975.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review