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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Effects of Al(OH)O nanoparticle agglomerate size in epoxy resin on tension, bending, and fracture properties
TL;DR: In this article, several epoxy Al(OH)O (boehmite) dispersions in an epoxy resin are produced in a kneader to study the mechanistic correlation between the nanoparticle size and mechanical properties of the prepared nanocomposites.
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Nanoinduced morphology and enhanced properties of epoxy containing tungsten disulfide nanoparticles
TL;DR: In this paper, the nano-induced morphology and the resulting enhanced fracture toughness of epoxy/WS2 nanocomposites were studied, and two main fracture mechanisms were observed, crack bowing around the nodular boundaries in the case of compatibility between the nanoparticle and the epoxy and particle-induced cavitation in case of incompatibility, respectively.
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The moisture effect on the fatigue crack growth of glass particle and fiber reinforced epoxies with strong and weak bonding conditions. Part 1. Macroscopic fatigue crack propagation behavior
TL;DR: In this article, the role of adhesion promoters in fatigue crack propagation behavior was determined by treating the glass reinforcements with silane-based promoters, and the underlying mechanisms operating in fatigue were identified using da/dN vs ΔK curves according to the model proposed by other investigators.
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High Velocity Impact Response of Aluminum- Carbon Fibers-Epoxy Laminated Composites Toughened by Nano Silica and Zirconia
TL;DR: In this article, the effects of SiO2 and ZrO2 nanoparticles type and content incorporated into an epoxy matrix on the high velocity impact behavior of carbon fiber reinforced aluminum laminates (CARALL) were investigated.
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Microstructure, mechanical properties and oxidation behavior of TaC- and HfC-based materials containing short SiC fiber
TL;DR: TaC and HfC-based composites containing 15-vol% short SiC fibers as reinforcing phase were produced by hot pressing at 1700-1750°C as mentioned in this paper.
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.