2011
DOI: 10.1016/j.jmbbm.2011.01.003
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Fracture resistance curves and toughening mechanisms in polymer based dental composites

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Cited by 29 publications
(17 citation statements)
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“…The observed behavior of the nanofill differed from that described by Shah et al (2009b), although comparable values of K Ic for crack initiation were found. In contrast, de Souza et al (2011) found frequent fracture of the nanofiller clusters, and little evidence of crack bridging in the nanofilled system. The crack resistance curve of the nanofill increased for small crack extensions (50-100 µm) up to 2 times the energy values for crack initiation.…”
Section: R-curve Behavior: Lefm Vs Epfm (J-integral)mentioning
confidence: 75%
See 1 more Smart Citation
“…The observed behavior of the nanofill differed from that described by Shah et al (2009b), although comparable values of K Ic for crack initiation were found. In contrast, de Souza et al (2011) found frequent fracture of the nanofiller clusters, and little evidence of crack bridging in the nanofilled system. The crack resistance curve of the nanofill increased for small crack extensions (50-100 µm) up to 2 times the energy values for crack initiation.…”
Section: R-curve Behavior: Lefm Vs Epfm (J-integral)mentioning
confidence: 75%
“…In all conditions, crack deflection was observed over the whole range of crack extension, while crack bridging was identified as the main mechanism for the increase in crack resistance. The J-integral method was used by de Souza et al (2011) to study the fracture of small hybrid double-cantilever beams due to the reduced linear-elastic stress field in relation to the fracture process zone. The authors measured the R-curve of a nanofilled composite (Filtek Z350, equivalent to Filtek Supreme Plus) and a nanohybrid composite (Concept Advanced, VigoDent, São Paulo, Brazil) composed of irregular fillers with a small size distribution.…”
Section: R-curve Behavior: Lefm Vs Epfm (J-integral)mentioning
confidence: 99%
“…The variation of the experimentally measured fracture resistance values is usually much higher than 15%, see for example the experimental results of Sørensen and Jacobsen [16] and De Souza et al [36]. Thus, it can be argued that the error of the proposed J integral method is so small that it allows the method to be used with confidence in practise.…”
Section: Assessment Of Proposed Methodsmentioning
confidence: 99%
“…It is possible to monitor the end-opening during loading using a camera, an optical microscope or by performing the experiment inside the chamber of an Environmental Scanning Electron Microscope (ESEM) [36]. In this case, it is possible to identify the critical opening for complete failure δ c experimentally.…”
Section: Implication For Experimentsmentioning
confidence: 99%
“…Ademais, sob a aplicação de forças, microfendas podem ser criadas ao redor do defeito pré existente, o que juntamente com a tensão acumulada na interface matriz/carga pode diminuir a resistência 174 . Por aumentar a mobilidade dos segmentos moleculares 126 e diminuir os espaços na interface matriz/carga, o tratamento térmico melhorou a distribuição de tensões dentro da matriz polimérica e aumentou a resistência do material à propagação de uma trinca pré-existente.…”
Section: Com Tratamento Térmicounclassified