Analytical failure analysis of bio/synthetic sandwich pipe under pressure

The objective of this study is to evaluate the potential applications of eco friendly-compositesbased on natural fibers. An analytical model has been developed in the present research to investigate themechanical behavior of sandwich pipes under internal pressure loading. The proposed model gives anaccurate solution for stresses, strains, and displacement on a sandwich pipe consisting of epoxy for thecore layer and reinforced materials with an alternative ply for the skin layers. The purpose of this study isto evaluate the potential applications of three natural fibers, which are pineapple leaf fiber (PALF), Alfa,and jute bio fibers in replacing synthetic glass fiber used in sandwich pipes. The solutions are obtained byusing the MATLAB numerical code. The TSAI-WU criterion was used to provide a failure analysis onthis subject. The distributions of stress, strain, and displacement through the thickness of the skins andcore are shown. Progressive strengthening of layer numbers was chosen to raise the rigidity of a biocomposite sandwich and reduce the gap compared to a synthetic sandwich, which allowed for optimalbehavior. The ultimate pressure and safety factors earned by increasing the number of biocompositelayers are important for composite transportation pressure pipelines, especially for sandwich pipes basedon PALF/epoxy.