Quantitative fractography as a novel approach to measure fracture toughness of direct resin composites

2020 ◽  
Vol 109 ◽  
pp. 103857 ◽  
Author(s):  
Nader Abdulhameed ◽  
Brendan Angus ◽  
Jack Wanamaker ◽  
John J. Mecholsky
Keyword(s):  
Fracture Toughness ◽  
Resin Composites ◽  
Quantitative Fractography ◽  
Novel Approach

Fracture toughness comparison of five indirect resin composites under the effect of thermal cycling

2015 ◽  
Vol 34 (2) ◽  
pp. 194-200 ◽  
Author(s):  
Xueqi Gan ◽  
Tingting Wu ◽  
Zhuoli Zhu ◽  
Xiangnan Wu ◽  
Yunmao Liao ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Thermal Cycling ◽  
Resin Composites

In situ fabrication of PAN nanofibrous composites for enhanced toughness

2020 ◽  
Vol 234 (16) ◽  
pp. 3228-3240
Author(s):  
A Zarehshi ◽  
AA Gharehaghaji ◽  
AA Asgharian Jeddi
Keyword(s):  
Fracture Toughness ◽  
Conventional Method ◽  
Polymeric Fibers ◽  
Elongation At Break ◽  
In Situ Fabrication ◽  
In Situ Method ◽  
Novel Approach ◽  
Polymeric Nanofibers ◽  
Recent Developments

Recent developments in nanocomposites that are reinforced with polymeric fibers have heightened the need for a material in fast-moving parts of machines. The research to date has focused on tensile properties of nanocomposites reinforced with polymeric nanofibers, which were produced by the conventional methods. In this work, nanocomposites were fabricated by a novel approach that comprises epoxy resin, epoxy hardener, and PAN nanofibers in which the nanofibrous layer was placed in resin as spun during the electrospinning. Then, a nanocomposite with the same materials was made using the conventional method of layering. There were enhancements in elongation at break, fracture toughness, and stress at break of nanocomposites fabricated by in situ method in comparison with the nanocomposites fabricated using the conventional method of layering.

Fracture toughness comparison of six resin composites

2008 ◽  
Vol 24 (3) ◽  
pp. 418-425 ◽  
Author(s):  
H WATANABE ◽  
S KHERA ◽  
M VARGAS ◽  
F QIAN
Keyword(s):  
Fracture Toughness ◽  
Resin Composites

Fracture toughness of nine flowable resin composites

2003 ◽  
Vol 89 (3) ◽  
pp. 261-267 ◽  
Author(s):  
Esteban D. Bonilla ◽  
Mahrokh Yashar ◽  
Angelo A. Caputo
Keyword(s):  
Fracture Toughness ◽  
Resin Composites

scholarly journals Characterization of Experimental Short-Fiber-Reinforced Dual-Cure Core Build-Up Resin Composites

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2281
Author(s):  
Eija Säilynoja ◽  
Sufyan Garoushi ◽  
Pekka K. Vallittu ◽  
Lippo Lassila
Keyword(s):  
Fracture Toughness ◽  
Resin Composite ◽  
Rotating Disk ◽  
Monomer Conversion ◽  
Short Fiber ◽  
Flexural Properties ◽  
Resin Composites ◽  
Fiber Reinforced ◽  
Three Point Bending ◽  
Light Curing

As a core build-up material, dual-cured (DC) resin-based composites are becoming popular. The aim of this research was to investigate specific physical and handling properties of new experimental short-fiber-reinforced DC resin composites (SFRCs) in comparison to different commercial, conventional DC materials (e.g., Gradia Core, Rebilda DC, LuxaCore Z, and Visalys® CemCore). Degree of monomer conversion (DC%) was determined by FTIR-spectrometry using either self- or light-curing mode. The flexural strength, modulus, and fracture toughness were calculated through a three-point bending setup. Viscosity was analyzed at room (22 °C) and mouth (35 °C) temperatures with a rotating disk rheometer. The surface microstructure of each resin composite was examined with scanning electron microscopy (SEM). Data were statistically analyzed with analysis of variance ANOVA (p = 0.05). The curing mode showed significant (p < 0.05) effect on the DC% and flexural properties of tested DC resin composites and differences were material dependent. SFRC exhibited the highest fracture toughness (2.3 MPa m1/2) values and LuxaCore showed the lowest values (1 MPa m1/2) among the tested materials (p < 0.05). After light curing, Gradia Core and SFRCs showed the highest flexural properties (p < 0.05), while the other resin composites had comparable values. The novel DC short-fiber-reinforced core build-up resin composite demonstrated super fracture toughness compared to the tested DC conventional resin composites.

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