Journal ArticleDOI
The interaction of a crack front with a second-phase dispersion
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In this paper, it was shown that a crack front increases its length by changing its shape when it interacts with two or more inhomogeneities in a brittle material, and an expression for the fracture energy was obtained.Abstract:
Observations are presented showing that a crack front increases its length by changing its shape when it interacts with two or more inhomogeneities in a brittle material. These observations are presented for both cleavage and conchoidal types of fracture. Based on these observations and the concept that a crack front possesses a line energy, an expression for the fracture energy is obtained. This expression shows that the fracture energy should increase as the distance between the dispersed inhomogeneities is decreased. Using the Griffith fracture criterion, this result is discussed for the case of strengthening a brittle material.read more
Citations
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Nanoscale and effective mechanical behavior and fracture of silica nanocomposites
TL;DR: In this paper, an experimental investigation of the composite and local mechanical and fracture behavior of an EPON-based epoxy with 12-nm and 100-nm fumed silica particles was carried out.
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Effect of grafted polymeric foaming agent on the structure and properties of nano-silica/polypropylene composites
TL;DR: In this paper, a polymerizable foaming agent p -vinylphenylsulfonylhydrazide was synthesized and grafted onto the nanoparticles via free-radical polymerization.
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Toughening due to crack-front interaction with a second-phase dispersion
TL;DR: In this article, a model for the restraining effect of second-phase inclusions on an advancing crack front in a brittle matrix is presented which incorporates a parameter characterizing the relative ease of cutting through or circumventing the second phase, compared with matrix cracking.
Journal ArticleDOI
Fracture toughness of resin-based luting cements.
TL;DR: The resin-modifiedGlass ionomer cements exhibited improved fracture toughness when compared with the conventional glass ionomer; however, they were still inferior to Enforce and C&B Metabond composite cements.
Journal ArticleDOI
Additive toughening effects on new bio-based thermosetting resins from plant oils
Jue Lu,Richard P. Wool +1 more
TL;DR: In this paper, three methods have been used to increase the toughness of triglyceride-based thermoset resins: liquid rubber, plasticizer, and inorganic nano-filler.
References
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Journal ArticleDOI
The Phenomena of Rupture and Flow in Solids
TL;DR: In this article, the authors investigated the effect of surface scratches on the mechanical strength of solids, and some general conclusions were reached which appear to have a direct bearing on the problem of rupture, from an engineering standpoint, and also on the larger question of the nature of intermolecular cohesion.
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LXXV. The moving griffith crack
TL;DR: In this article, a straight crack moving through an elastic medium is calculated and the stresses depend on the velocity and reduce to Inglis' solution when the velocity is zero, and the results may be applied to the spicular fracture of glass.
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Fracture Surface Energy of Glass
TL;DR: In this article, the double-cantilever cleavage technique was used to measure the fracture surface energy of six glasses and the results ranged from 3.5 to 5.3 J/m2 depending on the chemical composition of the glass and the temperature of the test.