U. Ramamurty et al., A METHOD FOR MEASURING RESIDUAL STRAINS IN FIBER-REINFORCED TITANIUM MATRIX COMPOSITES, Acta materialia, 44(8), 1996, pp. 3397-3406
Citations number
16
Categorie Soggetti
Material Science","Metallurgy & Metallurigical Engineering
A new method for measuring the residual fiber strains in fiber-reinfor
ced titanium matrix composites has been developed. The method involves
selectively etching the matrix over a prescribed length of composite
and subsequently measuring the extension of the relaxed fibers relativ
e to neighboring fibers that are still embedded within the matrix mate
rial. The extensions are measured using confocal microscopy. The metho
d is demonstrated on three unidirectionally reinforced composites with
varying fiber volume fractions. The effects of specimen tilt and fibe
r splaying following dissolution on the measured fiber extensions are
analyzed. The residual fiber strains are rationalized on the basis of
the thermoelastic properties of the constituents through a concentric
cylinder model. The current method can be applied to other metal matri
x composites reinforced with large diameter (monofilament) fibers, pro
vided the matrix can be selectively etched. Copyright (C) 1996 Acta Me
tallurgica Inc.