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Weibull theory predicts a higher strength in bending than in tension. How ever it assumes that failure initiates from a critical defect, whereas many unidirectional composites fail gradually in bending. A model has been developed of the composite as a bundle, each element of which consists of a...
The objective of this work was to evaluate the strength of four candidate cylindrical shear joints for composite tubes. The basic design for the joint entails an axial length of one inch with an external 15° tapered cone. The purpose of the joint is to transfer axial load from a cylinder through...
A composite with substantial optical transparency was produced by rein forcing poly(methyl methacrylate) (PMMA) with unidirectional borosilicate glass fibers. Optical transparency of the composite was achieved by matching the refractive index ( n D ) of the glass fiber and polymer matrix to...
The permeability of an idealized unidirectional reinforcement consisting of regularly ordered, parallel fibres is derived starting from first principles (Navier-Stokes equations) both for flow along and for flow perpendicular to the fibres. First, an approx imate analytical solution for...
The purpose of this paper is to describe the response of an aligned, lubri cated fiber bundle to a general state of three-dimensional stress. Such an element can be used to represent an advanced composite during manufacturing. In general, this bundle can deform by both viscous shearing, and by...
Impact loading on composite laminates can cause surface or internal damage in the form of fiber breakage, delamination and matrix cracking. Such damage can reduce laminate tensile strength. In the work presented here, impact damage was modelled as part through-the-thickness damage and laminate...
Two theories have been compared for the prediction of the effective vis cosities of laminates made up of layers of oriented discontinuous fiber assemblies sus pended in a viscous fluid. In the first theory, the layers are constrained to exhibit identical strain-rate components, while in the...
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