An experimental-theoretical research project on dynamic crack propagation on steel line pipes intended for arctic service was developed. The aim of this study is to characterize the dynamic material behavior, to propose line pipe qualification tests, and to identify the variables that govern the dynamic fracture process and their relationships. The first part of this research involves the experimental work and outlines a practical test to assess fitness for service of arctic pipelines. Burst tests of line pipes samples at low temperature were carried out and crack extension vs. time was measured. The axial crack fracture mechanism was quasi-cleavage in the center of the pipe wall with lateral shear lips. A pressure range for LBB (leak before break) condition was obtained. In Part II of this research a new model for the assessment of the dynamic material properties from the analysis of test results obtained in Part I is developed.


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    Title :

    Dynamic crack propagation in steel line pipes. Part I: Experimental investigation


    Additional title:

    Dynamische Rissausbreitung in Stahl-Pipelines. Teil I: Experimentelle Untersuchung


    Contributors:

    Published in:

    Engineering Fracture Mechanics ; 72 , 16 ; 2519-2534


    Publication date :

    2005


    Size :

    16 Seiten, 32 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





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