Acoustic emission analysis of fiber-reinforced composite in flexural testing

Alander, Pasi; Lassila, Lippo; Tezvergıl, Arzu; Vallittu, Pekka K.

doi:10.1016/s0109-5641(03)00108-8

Cited by 67 publications

(51 citation statements)

References 21 publications

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“…12,16,17 However, those studies did not involve resin composite surrounding the fiber as in the present study. Clinically, if the load (for example, from the opposing teeth) remains at a certain level, more AE signals may not be emitted, and crack propagation may not continue.…”

Section: Discussionmentioning

confidence: 95%

“…10 The mode of fracture is a good indicator of the path of crack propagation. [11][12][13][14] In general, stress concentrations within the resin and the interface are relieved by initiation of a crack and propagation of the crack through the resin until it meets the fiber, 15 resulting in debonding of the resin composite. Failure of the FRC due to external force may occur by the cracking of the polymer matrix, the fiber, or the interface.…”

Section: Discussionmentioning

confidence: 99%

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The effect of box preparation on the strength of glass fiber–reinforced composite inlay-retained fixed partial dentures

Özcan

Breuklander

Vallittu

2005

The Journal of Prosthetic Dentistry

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The effect of box preparation on the strength of glass fiber-reinforced composite inlayretained fixed partial dentures Özcan, Mutlu; Breuklander, Marijn H.; Vallittu, Pekka K. CopyrightOther than for strictly personal use, it is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license (like Creative Commons).Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. Download date: 11-04-2019The effect of box preparation on the strength of glass fiber-reinforced composite inlay-retained fixed partial dentures Purpose. The objective of this in vitro study was to evaluate the effect of box dimensions on the initial and final failure strength of inlay-retained fiber-reinforced composite (FRC) FPDs.Material and methods. Twenty-one inlay-retained FPDs were prepared using FRC (everStick) frameworks with unidirectional fiber reinforcement between mandibular first premolars and first molars. Boxes were prepared using conventional inlay burs (Cerinlay), and small and large ultrasonic tips (SONICSYS approx). Box dimensions were measured after preparation with a digital micrometer. All restorations were subjected to thermal cycling (6000 cycles, 5°C-55°C). Fracture testing was performed in a universal testing machine (1 mm/ min). Acoustic emission signals were monitored during loading of the specimens. Initial and final fracture strength values (2-way ANOVA, Bonferroni post hoc tests, a=.05) and failure types (Fisher exact test) were statistically compared for each group.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

The effect of box preparation on the strength of glass fiber–reinforced composite inlay-retained fixed partial dentures

Özcan

Breuklander

Vallittu

2005

The Journal of Prosthetic Dentistry

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“…By analyzing the data on duration, the two types of failure modes of fracture and debonding were found and the neural network was used to identify the damage. Alander et al [7] performed a three-point load loading test on composite specimens and found that the damage of the specimen occurred at 19% -32% of the failure load. Wu [8] used the Weibull function to describe the composite layer by the material damage mode and found that the tensile strength of the material with the number of layers is gradually decreased.…”

Section: Introductionmentioning

confidence: 99%

Research on stratified evolution of composite materials under four-point bending loading

Hao

You

Zheng

et al. 2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract:In order to explore the effect of stratified evolution and delamination on the load capacity and service life of the composite materials under the four-point bending loading, the artificial tectonic defects of the different positions were set up. The four-point bending test was carried out, and the whole process was recorded by acoustic emission, and the damage degree of the composite layer was judged by the impact accumulation of the specimen -time-amplitude history chart, load-time-relative energy history chart, acoustic emission impact signal positioning map. The results show that the stratified defects near the surface of the specimen accelerate the process of material failure and expansion. The location of the delamination defects changes the bending performance of the composites to a great extent. The closer the stratification defects are to the surface of the specimen, the greater the damage, the worse the service capacity of the specimen. IntroductionGlass fiber reinforced composite materials have excellent plasticity, fatigue resistance, and durability. Therefore, they are widely used in aerospace, shipbuilding, military equipment, sports equipment, water conservancy, infrastructure, and many other areas [1][2][3][4][5]. However, during their operation, sub-layer damage may enhance the composite material stratification, which issue becomes more and more topical.Some scholars and experts have made a study of composite materials. Huget et al [6] used the acoustic emission (AE) method to monitor the AE signal of polyester / GF composites during static tensile loading. By analyzing the data on duration, the two types of failure modes of fracture and debonding were found and the neural network was used to identify the damage. Alander et al [7] performed a three-point load loading test on composite specimens and found that the damage of the specimen occurred at 19% -32% of the failure load. Wu [8] used the Weibull function to describe the composite layer by the material damage mode and found that the tensile strength of the material with the number of layers is gradually decreased. The tensile strength values of the two-, three-and four-layer fiber reinforced composites were lower that of single-layer ones by 10, 20, and 25%, respectively. However, there is scarce research on the stratified damage evolution behavior of glass fiber reinforced composites, which is critical to the bearing capacity and service life of composite materials.

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“…Fiber-reinforced composite (FRC) FDPs on the other hand offer an alternative to the conventional metal and ceramic equivalents 4,5) . Despite some clinical limitations reported for FRC FDPs 6,7) their flexural strength, good esthetic values and physical stiffness of the framework are some of the advantages that they provide [8][9][10][11] . FRC FDPs are also less invasive, less time-consuming and less expensive than some traditional prosthetic alternatives such as conventional full-coverage FDPs.…”

Section: Introductionmentioning

confidence: 99%

Fracture behavior of pontics of fiber-reinforced composite fixed dental prostheses

et al. 2015

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To evaluate the load-bearing capacities and failure mechanisms of FRC FDPs using shell-shaped acrylic denture teeth as pontics with different composite resins as filling materials. Eighty-four inlay-retained FDPs with FRC frameworks were made using shell-shaped posterior artificial teeth as pontics. Different composite resins were used as filling materials to complete the shape of the pontics. Four groups (n=21/group) were formed based on the filling material. Each group was subdivided into three subgroups and tested at 90º and 30°. Each FDP was statically loaded from the pontic until the final fracture. ANOVA revealed statistically significant differences in the load-bearing capacities according to filling material, angle and storage (p<0.01). The fracture propagated from the fiber-rich part of the pontic towards the occlusal surface of the FDP. The filling material influenced the load-bearing capacities of FRC FDPs with shell-shaped denture teeth used as pontics.

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Acoustic emission analysis of fiber-reinforced composite in flexural testing

Cited by 67 publications

References 21 publications

The effect of box preparation on the strength of glass fiber–reinforced composite inlay-retained fixed partial dentures

The effect of box preparation on the strength of glass fiber–reinforced composite inlay-retained fixed partial dentures

Research on stratified evolution of composite materials under four-point bending loading

Fracture behavior of pontics of fiber-reinforced composite fixed dental prostheses

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