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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Book ChapterDOI
Interfacial Properties of Filled Epoxide Resins
TL;DR: In this paper, the fracture properties of two commercial epoxide resins both unfilled and filled with varying volume fraction of silica, alumina and dolomite particles have been investigated.
Journal ArticleDOI
Wear-related phenomena in advanced materials
TL;DR: In this paper, the concept of wear-related phenomena in advanced materials, along with a short introduction on the subjects, addressed by the accepted papers, will be presented in the following paragraphs.
Book ChapterDOI
6.1 Micromechanics of Nanocomposites
TL;DR: In this article, a review of recent studies of the mechanical properties of a wide range of nanocomposites, attempting to determine whether they are predictable by micromechanics models and mechanisms of the classical composite materials theory is presented.
Journal ArticleDOI
Fracture Behaviour of Brittle (Glass) Matrix Composites
TL;DR: Theoretical and experimental knowledge acquired on different kinds of brittle matrix composites is summarised in this article, where the composites were tested in as-received state but also after different forms of thermomechanical loading, e.g. thermal shock, thermal cycling in air, according to the envisaged composites application.
Journal ArticleDOI
Simultaneously stiffening and toughening epoxy by urea treated hydroxylated halloysite nanotubes
Songshan Zeng,Zaili Hou,Chinting So,Heilong Wai,Dong-Wuk Jang,Wingki Lai,Luyi Sun,Zhaoli Gao +7 more
TL;DR: In this paper , the interface of hydroxylated HNTs (h-HNTs) and epoxy matrix was enhanced by the introduction of urea molecules. And the resulting epoxy/h-hNT-urea nanocomposites exhibited significant enhancements simultaneously in tensile strength, Young's modulus, and fracture toughness by 23.4, 31.4 and 61.4%, respectively.
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.