title: ÐÑÐ¾Ð³Ð½Ð¾Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ðµ Ð´Ð»Ð¸ÑÐµÐ»ÑÐ½Ð¾Ð¹ Ð¿ÑÐ¾ÑÐ½Ð¾ÑÑÐ¸ Ð¿Ð¾Ð»Ð¸ÑÑÐ¸Ð»ÐµÐ½Ð¾Ð²ÑÑ ÑÑÑÐ±Ð¾Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¾Ð² Ð¼ÐµÑÐ¾Ð´Ð¾Ð¼ ÑÑÑÐ¿ÐµÐ½ÑÐ°ÑÑÑ Ð¸Ð·Ð¾ÑÐµÑÐ¼
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¼Ð°Ð³Ð¸ÑÑÑÐ°
titleType: Subtitle
title: Prediction of the longâterm strength of polyethylene pipelines by the stepped isothermal method
Creators: name: ÐÐ°ÑÐ°ÑÐ»Ð»Ð¸Ð½Ð°, Ð Ð¸Ð°Ð½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2022
Subjects: Ð¢ÑÑÐ±Ð¾Ð¿ÑÐ¾Ð²Ð¾Ð´Ñ
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Ð¿Ð¾Ð»Ð¸ÑÑÐ¸Ð»ÐµÐ½ Ð½Ð¸Ð·ÐºÐ¾Ð³Ð¾ Ð´Ð°Ð²Ð»ÐµÐ½Ð¸Ñ
Ð¼ÐµÑÐ¾Ð´Ñ Ð¿ÑÐ¾Ð³Ð½Ð¾Ð·Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ
stepped isothermal method
high-density polyethylene
prediction methods

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description: Title of the final qualification work is âPrediction of the longâterm strength of polyethylene pipelines by the stepped isothermal methodâ. The work is devoted to the study of mechanical and viscoelastic properties of polymeric materials, as well as the study of the stepped isothermal method of using the example of lowâpressure polyethylene to predict the longâterm strength of the pipeline. Object of study: experimental measurements of the creep modulus and the construction of a creep curve to construct a longâterm creep curve. Subject of research: application of the method of stepwise isotherms on the example of a high-density polyethylene pipe. When writing a final qualified work, a review of methodological and literary sources, collection of information, generalization and systematization of data, description, and comparison was carried out. A strength and hydraulic calculation of the pipeline was carried out, where it was revealed under what pressure to transport the liquid, as well as how the diameter changes during the operation period and how this further affects the flow of the pipeline. The results were compared with data published in the scientific literature. Recommendations for the operation of a lowâpressure polyethylene pipe have been developed, calculations have been made and conclusions have been drawn.