Polyethylene pipes reinforced by winding steel wires (PSP) have been widely used in many fields such as chemical engineering, pulp conveying, water supply, etc. The combined loads of inner pressure and bending sometimes leads to the failure of PSP, and it is still not proposed that the failure criterion of combined loads used for engineering projects. In this paper, a finite element model of PSP was established in which modeling of steel wires and HDPE matrix were conducted separately. The degree of steel wires and HDPE were coupled as the interface between these two constituents were considerd intact. The boundary condition of the FE model was applied according to an existing bending experiment. The validation of the model was carried out using the existing test data, and the simulation result agreed well with test result indeed. Subsequently, the PSP model was changed to undertake the inner pressure and four-point bending, to analyze the failure behavior of PSP under this kind of condition, with three factors such as varied diameters, inner pressure and volume ratio of steel wires. In the end  curvature of failed PSP was considered as the failure criterion, and the relationship of curvature and the three factors were discussed. This paper is useful for the safety of PSP subject to inner pressure and bending. 


Investigation of Failure Behavior of Polyethylene Pipe Reinforced by Winding Steel Wires Subject to Inner Pressure and Bending

Division / Sponsors: 
Pressure Vessels & Piping (PVP)


Paper Proceedings: https://asmedigitalcollection.asme.org/PVP/PVP2020/volume/83815

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