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
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Book ChapterDOI
Toughening of ceramics
Michael V. Swain,L. R. F. Rose +1 more
TL;DR: In this article, five distinct mechanisms of toughening ceramics are identified; 1) crack deflection, 2) crack bowing, 3) fiber reinforcement, 4) micro-cracking and 5) transformation tougheening.
Journal ArticleDOI
A comparison between the failure modes observed in biological and synthetic polymer nanocomposites
TL;DR: Synthetic polymer nanocomposites display enhanced toughness and energy absorption with regard to unreinforced polymers as mentioned in this paper, and the interaction between the polymeric matrix and the reinforcements triggers enhanced toughness.
Dissertation
Matériaux composites aéronautiques hautes températures à matrice bismaléimide renforcée
TL;DR: The composites a matrice epoxy ont fait l'objet de developpements pour ameliorer ces proprietes, en incorporant dans les formulations des thermoplastiques solubles et insolubles qui ont pour effet de freiner la propagation des delaminages induits par des impacts as discussed by the authors.
Book ChapterDOI
Composite Calcium Phosphate/Titania Scaffolds in Bone Tissue Engineering
TL;DR: The addition of titania particles to hydroxyapatite has attracted considerable attention based on the assumption that resulting materials can enhance osteoblast adhesion and promote cell growth while also providing high strength and fracture toughness in the final composite material, thus being adequate for load-bearing applications.
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.