Finite element analysis of the stress distribution in a thermally and transversely loaded Ti-6Al-4V/SiC fibre composite

The load transfer between fibre and matrix in a metal matrix composite (MMC ) depends on the properties and conditions of the fibre/matrix interfacial region. The objective of this investigation is to gain a better understandi ng of the stresses generated within a continuously reinforced MMC, particul arly at this interface. Finite element analysis is used to investigate the effect of thermal and transverse mechanical loading on the SiC/Ti-6Al-4V co mposite system. The effect on the stress held of a carbon coating on the Si C fibres is also investigated. The results indicate that the interfacial re gion affects the stress distribution, with the presence of the carbon coati ng significantly altering the stress profiles generated. It is also found t hat the residual stresses generated as a result of cooling down the composi te from processing temperature, has a marked effect on the stress profile a nd the behaviour of the composite when subsequent mechanical loading is app lied. (C) 2001 Elsevier Science Ltd. All rights reserved.