Co-operative microbuckling of two fibres in a model composite
- 54 Downloads
Cooperative fibre microbuckling, a compressive failure mechanism in unidirectional fibre-reinforced composites, was studied in a model system composed of two polyamide fibres in a transparent silicone matrix. The transparent matrix permitted direct observation of fibre microbuckling during compression. In all cases fibres buckled in a sinusoidal pattern with a critical wavelength characteristic of the fibre diameter and the modulus ratio of the fibre and matrix as observed previously with single fibre composites. At smaller separation distances, the two fibres microbuckled co-operatively in the common plane. At larger separation distances, the fibres microbuckled non-co-operatively in different planes. A stress overlap criterion based on the in-plane shear stress is proposed for co-operative fibre microbuckling.
KeywordsSeparation Distance Modulus Ratio Compressive Failure Silicone Matrix Common Plane
Unable to display preview. Download preview PDF.
- 3.B. W. ROSEN, in “Fiber composites” (ASM, Metals Park, Ohio, 1965) p. 37.Google Scholar
- 5.A. S. ARGON, in “Treatise on materials science and technology,” Vol. 1, edited by H. Liebowitz (Academic Press, New York, 1972) p. 106.Google Scholar
- 6.C. MUELLER, A. GORIUS, S. NAZARENKO, A. HILTNER and E. BAER,J. Comp. Mater. in press.Google Scholar