Prediction of the Polymer Reinforced Pipeline Stress-Strain State taking into Account Technological Residual Stresses

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Abstract

The paper presents statements and results of the numerical implementation of three stages of predicting the stress-strain state of polymer reinforced pipes (PRP) under internal pressure by taking into account residual stresses arising during the manufacturing process. Prediction of effective characteristics in the reinforced layer is built at the first stage. The problem of predicting residual stresses is solved at the second stage. The problem of finding the stress-strain state under the internal pressure taking into account the residual stresses is solved at the third stage. The solution to the set problems was carried out numerically by using the finite element method. This aims at identifying problem areas of the PRP design, development and evolution of a methodology for modeling behavior under various loads. Elastic characteristics of materials and stationary formulations of problems are considered within the presented work. The considered problems made it possible to conduct a qualitative approximate assessment of the PRP stress-strain state during manufacturing and operation and to identify patterns of deformation and zones of possible destruction of structural elements. In order to find and formulate rejected characteristics, recommendations for installation and operation it is necessary to implement more complex models aimed at describing the material behavior and taking into account the temperature and time dependencies of the mechanical characteristics of high-density polyethylene PE 100 and composite materials based on it.

Keywords

polymer reinforced pipespolyethylenefiberglasstechnological mechanicseffective characteristicsresidual stressesstress-strain statepressureoperationmodelingFEM

Bibliography

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Article information

Published
8 December 2025
Issue date
8 December 2025
Issue
No. 4 (2025)
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