Showing papers by "Michael R Wisnom published in 1999"
TL;DR: In this article, the effect of test specimen size on the unnotched strength of continuous fiber reinforced composites is considered, and different fundamental failure mechanisms of fibre direction tension, fibre direction compression, and matrix dominated transverse tension and shear are discussed in turn.
283 citations
TL;DR: In this article, the compressive strength of composites based on non-crimped fabric (NCF) under axial loading has been investigated using a two-dimensional repeating finite-element model through the thickness of a biaxial fabric, and the NCF compressive properties to the geometrical and mechanical characteristics of the constituents.
92 citations
TL;DR: In this article, it was shown that there is a critical relationship between the Weibull shape parameter, m, and the singularity strength, λ, even with a singular stress (or strain) field present.
66 citations
TL;DR: In this article, the authors investigated the interlaminar shear behavior of non-crimped-fabric-based composites by using a finite element approach, which is intended to provide an understanding of the basic mechanisms which control the NCF behaviour, together with manufacturing guidelines for the fabric structure.
55 citations
TL;DR: In this paper, the concept of overwinding unidirectional carbon-fibre composite elements with aramid fiber under very high tension is proposed, which leads to a highly damage-tolerant form of carbon fiber composite and opens up new possibilities for exploitation of the material.
Abstract: The concept of overwinding unidirectional carbon-fibre composite elements with aramid fibre under very high tension is proposed. This produces compressive stresses in the carbon-fibre composite which have to be overcome before transverse failure can occur. It is shown that this suppresses splitting under impact loading and leads to greatly improved residual compressive strength. The weight penalty is small, and overwound material could actually be lighter since it should be possible to use a higher volume fraction of carbon fibre. The concept leads to a highly damage-tolerant form of carbon-fibre composite and opens up new possibilities for exploitation of the material.
18 citations
01 Jan 1999
1 citations