Journal ArticleDOI
Elastic moduli of fibrous composites containing misaligned fibres
TLDR
In this paper, the curvature of the curved fibres is considered as a wave producing shear or extensional strains in the matrix, and the analysis and conclusions distinguish between various sources of misalignment, and include consideration of fibre straightening.Abstract:
There are many processes in the manufacture of industrial continuous-fibre composites which may result in slight buckling of the fibres. The measured values of their tensile elastic moduli will be below those of carefully prepared laboratory test-pieces. This phenomenon is analysed, by considering the curved fibres as waves producing shear or extensional strains in the matrix. The analysis and conclusions distinguish between various sources of misalignment, and include consideration of fibre straightening.read more
Citations
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Journal ArticleDOI
Measurement of small angle fiber misalignments in continuous fiber composites
TL;DR: In this article, the volume fraction distribution of fiber misalignment angle in the range of ±10°, with an estimated resolution of ±0·25°, is presented for carbon fiber composites, which includes both in-plane and out-of-plane misalignments.
Journal ArticleDOI
Compressive failure of composites, part II: Experimental studies
TL;DR: In this article, issues related to compression testing of composites and micromechanical failure models were reviewed, and the advantages and disadvantages of the many different experimental techniques to measure fiber strength were presented.
Journal ArticleDOI
The effect of fibre waviness on the mechanical properties of unidirectional fibre composites: A review
TL;DR: In this article, four properties of unidirectional fiber composites are shown to be influenced by fibre waviness, and some features of delamination resistance can be explained in terms of fibre Waviness.
Journal ArticleDOI
A theoretical framework for the compressive properties of aligned fibre composites
TL;DR: In this article, a new theory for compressive strength is proposed based on the precept that a number of different mechanisms can cause composite failure and the active one in a particular situation is that which gives the lowest failure stress.
Journal ArticleDOI
Compressive failure and kinking in uniaxially aligned glass-resin composite under superposed hydrostatic pressure
A. S. Wronski,T. V. Parry +1 more
TL;DR: In this article, the failure process in uniaxially aligned 60% fibre volume fraction glass fibre-epoxide compressive specimens strained parallel to the fibre axis was investigated at atmospheric and superposed hydrostatic pressures up to 300 MN m−2.
References
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Journal ArticleDOI
The Elastic Stability of Fibers in a Composite Plate
Wen-Yi Chung,Rene B. Testa +1 more
TL;DR: In this paper, the stability of unidirectional, equally spaced fibers in the plane of a composite plate is formulated by treating the fibers as beams and the matrix by the theory of generalized plane stress.
Journal ArticleDOI
The elastic constants of an isotropic matrix reinforced with imperfectly oriented fibres
TL;DR: In this paper, the axial Young's modulus of fibres imperfectly aligned in an elastic matrix is derived as a function of angular fibre scatter for various values of fibre-matrix modulus ratio and fibre volume fraction.
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