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The purpose of this work was to determine the toughening mechanisms in interlayered carbonfiber/epoxy composites. The primary variables were: (1) the diameter of the interlayering particles; (2) the thickness of the interply; and (3) the ductility of the matrix resin. G IIC was measured and...
Strain localization and failure behaviour of short-glass-fibre-reinforced polypropylene (SGFPP) have been investigated in compact tension (CT) specimens by using the Hentschel random access tracking system. The displacement fields measured in a zone behind the notch of the specimen are used to...
A finite element technique has been used to study the effects of coating properties on the propagation of cracks which terminate perpendicular to the fiber coating or coating/matrix interfaces. Four types of coatings are considered for Nicalon/SiC composites. The hoop and tangential stresses and...
Aluminum/silicon alloys reinforced with low volume fractions of short aluminosilicate fibers were prepared by the squeeze-casting process. The wear behavior of the metal-matrix composites (MMCs) and that of the monolithic Al/12 wt% Si alloy was investigated in pin-on-disk tests from room...
Iron-based composites are an important class of wear- and corrosion-resistant materials for the chemical and process industries. The influence of the metal/ceramic interface on the microstructure and mechanical properties of iron-based composites with a high-chromium white iron matrix has been...
Three epoxy systems of interest as composite matrix materials are examined for their yielding and failure behavior under uniaxial, biaxial and triaxial stress states. Yield criteria applicable to glassy polymers, i.e. accounting for the hydrostatic stress effect on the deviatoric stress to...
A three-dimensional geometric description for a large range of two-dimensional woven architectures is proposed which can serve as a basis for stiffness and strength modelling of fabric composites. We introduce a strict logical scheme for calculating the full geometry of a general yarn...
An analytical model based on shear-lag theory has been developed to predict fracture behavior of unidirectional composites with a center surface notch and longitudinal matrix damage. A delay effect on two split surfaces touching each other is taken into account in the model. The definitive...
The interlaminar fracture toughness of a unidirectional poly (ether ether ketone)/carbon-fibre laminate and the toughness of the plain resin have been studied over a wide range of temperatures and crack speeds by double cantilever beam (DCB) and double torsion (DT) testing, respectively....
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