Influence of Service Life on Physical and Mechanical Characteristics of Polyethylene Pipes

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Inorganic Materials: Applied Research Pub Date : 2024-10-09 DOI:10.1134/S2075113324701041

O. Yu. Elagina, A. V. Buryakin, N. S. Poches

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Abstract

An experimental evaluation of the decrease in actual physical and mechanical characteristics of low pressure polyethylene (HDPE) pipes depending on the duration and conditions of their operation has been conducted. To assess the impact of operational factors on the pipe characteristics, the following parameters were determined: tensile elongation and tensile strength, thermal stability (induction period of oxidation (IPO) of the material), and degree of crystallinity. It was found that, after prolonged operation of HDPE pipes compared to the initial normative values, the most significantly affected parameters are the tensile elongation and the induction period of oxidation. Moreover, the changes in tensile elongation and IPO parameters have a similar nature in terms of the loss of properties, indicating a correlation between them. The most sensitive indicators for predicting the service life of HDPE pipes are the tensile elongation and the induction period of oxidation. On the basis of the data obtained, it seems promising to monitor the IPO value when determining the technical condition of polyethylene pipes. A calculated forecast of the service life of polyethylene pipes based on reaching their ultimate state has been performed.

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使用寿命对聚乙烯管道物理和机械特性的影响

对低压聚乙烯（HDPE）管道的实际物理和机械特性随其运行时间和条件的不同而降低的情况进行了实验评估。为了评估操作因素对管道特性的影响，测定了以下参数：拉伸伸长率和拉伸强度、热稳定性（材料的诱导氧化期 (IPO)）和结晶度。结果发现，与最初的标准值相比，高密度聚乙烯管道经过长时间运行后，受影响最大的参数是拉伸伸长率和诱导氧化期。此外，拉伸伸长率和 IPO 参数的变化在性能损失方面具有相似性，表明它们之间存在相关性。预测高密度聚乙烯管道使用寿命的最敏感指标是拉伸伸长率和氧化诱导期。根据所获得的数据，在确定聚乙烯管材的技术状况时监测 IPO 值似乎很有前途。在达到极限状态的基础上，对聚乙烯管道的使用寿命进行了计算预测。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Inorganic Materials: Applied Research Engineering-Engineering (all)

CiteScore

0.90

自引率

0.00%

发文量

199

期刊介绍： Inorganic Materials: Applied Research contains translations of research articles devoted to applied aspects of inorganic materials. Best articles are selected from four Russian periodicals: Materialovedenie, Perspektivnye Materialy, Fizika i Khimiya Obrabotki Materialov, and Voprosy Materialovedeniya and translated into English. The journal reports recent achievements in materials science: physical and chemical bases of materials science; effects of synergism in composite materials; computer simulations; creation of new materials (including carbon-based materials and ceramics, semiconductors, superconductors, composite materials, polymers, materials for nuclear engineering, materials for aircraft and space engineering, materials for quantum electronics, materials for electronics and optoelectronics, materials for nuclear and thermonuclear power engineering, radiation-hardened materials, materials for use in medicine, etc.); analytical techniques; structure–property relationships; nanostructures and nanotechnologies; advanced technologies; use of hydrogen in structural materials; and economic and environmental issues. The journal also considers engineering issues of materials processing with plasma, high-gradient crystallization, laser technology, and ultrasonic technology. Currently the journal does not accept direct submissions, but submissions to one of the source journals is possible.