Abstract
Abstract Results of single-fibre pull-out tests reflect a combination of adhesive, cohesive and frictional phenomena that complicate micromechanical modelling and the relation to composite properties. SEM images of fracture surfaces detected cohesive fracture and unstable crack propagation during pull-out of well sized fibres out of both ductile and brittle matrices. New non-destructive methods have been used to characterize the physical properties of interphases. Atomic force microscopy in force modulation mode has visualized interphases of 1 to 3 μm thickness and gradients depending on the fibre–matrix model composite. The single fibre dynamic load test has been shown to be a feasible tool for determination of fibre–matrix adhesion or friction and ductility of matrix.
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