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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Journal ArticleDOI
Modelling the toughness of porous sintered glass beads with various fracture mechanisms
Franck Tancret,F. Osterstock +1 more
TL;DR: In this paper, the peak of the critical strain energy release rate with porosity, as previously measured on sintered glass beads, is modelled, based on the description of the actual microstructure as resulting from the densification of an initial stacking of spheres.
Journal ArticleDOI
Interlaminar fracture toughness and associated fracture behaviour of bead-filled epoxy/glass fibre hybrid composites
Jung Ju Lee,Chang Min Suh +1 more
TL;DR: In this article, two different bead-filled epoxies were used as matrices for the beadfilled epoxy/glass-fibre hybrid composites to investigate enhancement of matrix-dominated properties of a composite laminate.
Journal ArticleDOI
Toughening mechanisms in modified epoxy resins with different crosslink densities
TL;DR: In this article, the authors investigated crack-tip deformation in pre-cracked core-shell rubber particle modified epoxy resins with different degrees of crosslinking and found that light cross linking resulted in cavitation of the modifier, the formation of croids and extensive crack tip yielding, whereas these deformation mechanisms were suppressed at room T in highly crosslinked specimens.
Book ChapterDOI
Toughening mechanisms in nanoparticle polymer composites: experimental evidences and modeling
TL;DR: In this paper, the main damage mechanisms reported in the literature for nanoparticle-reinforced polymers, to include new insights, and to discuss predictive models incorporating these mechanisms.
Journal ArticleDOI
Mechanical properties of epoxy composites embedded with functionalized urea-formaldehyde microcapsules containing an oxidizable oil
TL;DR: In this paper, Urea-formaldehyde microcapsules (UFMs) containing an oxidizable oil phase were synthesized and were modified by 3-aminopropyltriethoxysilane (APTES).
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.