This study explores the capabilities of a computational cell framework into a 3-D setting to model ductile fracture behavior in tensile specimens and damaged pipelines. The cell methodology provides a convenient approach for ductile crack extension suitable for large scale numerical analyses which includes a damage criterion and a microstructural length scale over which damage occurs. Laboratory testing of a high strength structural steel provides the experimental stress-strain data for round bar and circumferentially notched tensile specimens to calibrate the cell model parameters for the material. The present work applies the cell methodology using two damage criterion to describe ductile fracture in tensile specimens: (1) the Gurson-Tvergaard (GT) constitutive model for the softening of material and (2) the stress-modified, critical strain (SMCS) criterion for void coalescence. These damage criteria are then applied to predict ductile cracking for a pipe specimen tested under cycling bend loading. While the methodology still appears to have limited applicability to predict ductile cracking behavior in pipe specimens, the cell model predictions of the ductile response for the tensile specimens show good agreemeent with experimental measurements.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    A micromechanics approach to assess ductile crack initiation in damaged pipelines


    Beteiligte:


    Erscheinungsdatum :

    2003


    Format / Umfang :

    10 Seiten, 10 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    A study of ductile crack propagation in gas pressurized pipelines

    Shannon, R. / Wells, A. | Tema Archiv | 1974


    Burst pressure predictions of cracked pipelines using a micromechanics approach

    Dotta, Fernando / Ruggieri, Claudio | Tema Archiv | 2003


    The ductile behaviour of damaged ice under compression

    Weiss, J. | British Library Conference Proceedings | 1999


    Condition assessment of damaged elbow in subsea pipelines

    Lee, Geon Ho / Seo, Jung Kwan / Paik, Jeom Kee | Taylor & Francis Verlag | 2017


    Condition assessment of damaged elbow in subsea pipelines

    Paik, Jeom Kee | Online Contents | 2016