Journal ArticleDOI
The interaction of a crack front with a second-phase dispersion
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TLDR
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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Rubber Toughened and Nanoparticle Reinforced Epoxy Composites
Medina Barrón,Rosa María +1 more
TL;DR: In this article, a modified epoxy matrix was developed with enhanced mechanical and thermal properties, suitable to be processed by transfer molding technology, to manufacture Glass Fiber Reinforced Composites (GFRCs) with improved performance in comparison to the commercially available ones.
Modification of Epoxy Systems for Mechanical Performance Improvement
TL;DR: In this paper, the development of novel modified epoxy matrices, with enhanced mechanical, fracture mechanical and thermal properties, suitable to be processed by filament winding technology, to manufacture composite based calender roller covers with improved performance in comparison to commercially available products.
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Novel Epoxy Prepreg Resins for Aircraft Interiors based on Combinations of Halogen-Free Flame Retardants
Thomas Neumeyer,Anika Bauernfeind,Verena Eigner,Claudia Mueller,Kerstin Pramberger,Volker Altstaedt +5 more
TL;DR: In this article, an approach to enhance the properties of epoxy novolac-based resin formulations is presented, where the phosphorus-based flame retardant DOPO (9,10-dihydro-9-oxa-10-phosphaphenanthrene-10oxide) is used in combination with inorganic flame retardants to merge different flame-retarding mechanisms.
Journal ArticleDOI
In-situ crack propagation in pressureless sintered fiber reinforced composites
TL;DR: In this article, the crack propagation in sintered SiC fiber reinforced alumina matrix composites was studied in situ inside a scanning electron microscope and both crack front and crack wake toughening mechanisms were studied in isolation.
Journal ArticleDOI
How Temperature and Loading Rate Affect the Yield Behavior in Polymer-modified Asphalt Systems
S.A.M. Hesp,S.D. Roy +1 more
TL;DR: In this article, the authors report on how temperature and loading rate affect the low-temperature yield properties of two asphalts (California Valley and Bow River sources), straight and modified with 5% by weight of four commonly used commercial polymers (styrene-butadiene diblock, triblock and radial and ethylene-vinyl acetate copolymers).
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.