Modeling creep in a thick composite cylinder subjected to internal and external pressures

A mathematical model to describe secondary creep in a thick composite cylinder made of Al–SiC and subjected to both internal and external pressures has been developed. The creep behavior of the composite has been described by a threshold stress based creep law with a stress exponent of 5. The model developed has been used to investigate the effect of varying size and content of the SiC dispersoid on the stresses and strain rates in a composite cylinder. It is observed that the stress distributions in the cylinder do not have significant variation with varying size and content of the SiC . Unlike stresses, the strain rates in the cylinder are reduced to a significant extent by decreasing the size of SiC and increasing the content of SiC