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
Particulate filled polypropylene: structure and properties
TL;DR: Particulate-filled polypropylene (PP) has been used in large quantities in numerous fields of applications for many years as discussed by the authors, with the result that PP composites successfully penetrate fields traditionally occupied by other materials such as ABS.
Journal ArticleDOI
Characterization of the fracture behavior of epoxy reinforced with nanometer and micrometer sized aluminum particles
TL;DR: In this article, the effects of particle size and silane treatment on the fracture toughness were experimentally evaluated for epoxy reinforced with nanometer and micrometer sized rigid particles.
Journal ArticleDOI
Fracture behaviour of composites based on Al2O3-TiC
R. P. Wahi,B. Ilschner +1 more
TL;DR: In this article, the critical stress intensity factor and other related fracture parameters have been measured in three-point bending for pure Al2O3-TiC composites containing 4 to 35 volume fractions of TiC.
Journal ArticleDOI
Progress in silicon-based non-oxide structural ceramics
Wolfgang Dressler,Ralf Riedel +1 more
TL;DR: In this paper, the progress in monolithic Si3N4 and SiC as well as in Si 3N4/SiC-composites for structural applications is reviewed.
Journal ArticleDOI
Carbon nanofibers enhance the fracture toughness and fatigue performance of a structural epoxy system
TL;DR: In this article, small fractions of a helical-ribbon carbon nanofiber (CNF) were added to an amine cured epoxy system and the resulting nanocomposites were tested to failure in two modes of testing; Mode I fracture toughness and constant amplitude of stress tension-tension fatigue.
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.