Stress concentrations in multiple fibre model composites
Composites Part A: Applied Science and Manufacturing 29 (9-10) : 1013-1019 (1998)
The finite element method is used to examine the load transfer in the fibre-matrix interface and between broken and neighbouring unbroken fibres. Three different models for the stress-strain dependence of the matrix were chosen for modelling the stress transfer: linear elastic, linear elastic-ideal plastic and hypoelastic. The hypoelastic behaviour is similar to the time independent viscoelastic behaviour of the polymer matrix. The hypoelastic model of the stress-strain behaviour can describe the mechanical properties of different matrix materials taken from simple tensile tests. The values of the stress intensity factors were used to discuss the different material models. The hypoelastic matrix behaviour results in realistic stress concentration factors K caused by a single fibre break.
C. micro mechanics
Finite element analysis
Interfacial shear stress