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Abstract <p>The assessment of material toughness is governed by codes based largely on rigorous experimental results. However, the problem of transferability from the laboratory specimen to field-scale structures limits the extent to which these results can be used. The present work is a developmental contribution to a new approach for assessing the toughness of pipeline steels. The procedure concerns the interaction between material fracture curve based on the three-parameter fracture criterion (<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="10808_2025_1552_Article_IEq1.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="90" /> </InlineMediaObject> <EquationSource Format="TEX">\(K- T- {{A}_{3}}\)</EquationSource> <!--JAMT2502011Lamsadfa-m1--> </InlineEquation>) and the surface longitudinal notch driving force of a pipe under internal pressure. This could be applied as an important engineering parameter for assessing the structural integrity of pipelines during long-term operation.</p>

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Development of a New Approach for Assessing the Fracture Toughness of Gas Pipe Steels

  • 期刊论文

  • 发表日期：

    2025年4月1日

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  • S. Lamsadfa,
  • M. Amara,
  • A. Belalia,
  • M. Hadj Meliani,
  • G. Pluvinage,
  • Yu. G. Matvienko

摘要

Abstract

The assessment of material toughness is governed by codes based largely on rigorous experimental results. However, the problem of transferability from the laboratory specimen to field-scale structures limits the extent to which these results can be used. The present work is a developmental contribution to a new approach for assessing the toughness of pipeline steels. The procedure concerns the interaction between material fracture curve based on the three-parameter fracture criterion ( \(K- T- {{A}_{3}}\) ) and the surface longitudinal notch driving force of a pipe under internal pressure. This could be applied as an important engineering parameter for assessing the structural integrity of pipelines during long-term operation.