Modelling and Optimal Design of Thick-Walled Composite Pipes under In-Service Conditions

The current study is focused on the stress-strain analysis of multi-layered thick-walled fibre reinforced composite pipes under torsional load. Three-dimensional elasticity solution has been obtained and Finite Element Method model has been developed to predict the stress-strain distribution and compute the Tsai-Hill failure coefficients. The models have been validated by comparing with the results available in the literature. As a numerical example the composite pipe subjected to pure torsion load has been considered. The effects of the torque magnitude and layers' thickness for specific pipe lay-ups have been investigated, and the appropriate engineering conclusions and design suggestions have been reported.