Overall creep modelling of short fibre reinforced composites with weakened interfaces and complex fibre orientation distributions

• Published in: Mechanics of materials Vol. 32; no. 6; pp. 349 - 359
• Main Authors: Schjødt-Thomsen, J., Pyrz, R.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier Ltd 01-06-2000; Amsterdam Elsevier Science; New York, NY
• Subjects: Complex fibre orientation; Condensed matter: structure, mechanical and thermal properties; Creep; Exact sciences and technology; Fundamental areas of phenomenology (including applications); Inelasticity (thermoplasticity, viscoplasticity...); Mechanical and acoustical properties of condensed matter; Mechanical properties of solids; Mori–Tanaka approach; Overall creep modelling; Physics; Schapery model; Short fibre composites; Solid mechanics; Structural and continuum mechanics; Viscoelasticity, plasticity, viscoplasticity; Weakened interfaces; Complex fibre orientation; Schapery model; Short fibre composites; Mori–Tanaka approach; Overall creep modelling; Weakened interfaces; Constitutive equation; Short fiber; Creep; Unidirectional fiber material; Fiber reinforced material; Modeling; Composite material; Mean-field theory; Inelasticity; Fiber orientation; Microstructure; Random medium; Effective medium model
• ISSN: 0167-6636; 1872-7743
• DOI: 10.1016/S0167-6636(00)00010-7

This paper deals with the overall creep response of a short fibre reinforced composite. The fibres are oriented differently in the matrix through a distribution function of the Euler angles. No fibre length distribution function is used, i.e. the fibres are of the same length. The approach is based upon the Mori–Tanaka mean field theory in which the fibres are considered as inhomogeneities containing equivalent eigenstrains. Furthermore, the effect of an imperfect interface is considered through a modified Eshelby tensor. It is shown that for UD composites the interfacial parameter does not influence the elastic stiffness in the fibre direction. For various fibre distributions the weakened interface has the largest influence when applying shear loading to a nearly unidirectional composite.