Stress Analysis of Plastic Pipe Reinforced by Cross Helically Wound Steel Wires

Polyethylene pipe reinforced by cross helically wound steel wires (PSP), which has excellent performance, is a new type of plastic-matrix steel composite pipe. PSP consists of three continuous layers, i.e., inner PE layer, composite layer and outer PE layer. Elastic parameters of the composite layer were obtained with series and parallel models. Solutions for elastic stresses and strains of the PSP under internal pressure, external pressure, and axial force were developed by using the three-dimensional (3-D) anisotropic elasticity. Good agreement between theoretical results and experimental data shows that the presented model can well predict stresses and strains of the PSP.