This work provides an estimation procedure to determine J-resistance curves for SE(T) (single edge notched tension) fracture specimens using the unloading compliance technique and the eta-method. In the present study, attention is directed to pin-loaded SE(T) specimens with varying geometry and crack sizes but representative solutions are also included for clamped SE(T) specimens. A summary of the methodology upon which J and crack extension are derived sets the necessary framework to determine crack resistance data from the measured load versus displacement curves. The extensive plane-strain analyses enable numerical estimates of the nondimensional compliance, my, and parameters eta and gamma for a wide range of specimen geometries and material properties characteristic of structural and pipeline steels. Laboratory testing of an API (American Petroleum Institute) 5L X60 steel at room temperature using pin-loaded SE(T) specimens with side-grooves provide the load-displacement data needed to validate the estimation procedure for measuring the crack growth resistance curve for the material. The results presented here produce a representative set of solutions which lend further support to develop standard test procedures for constraint-designed SE(T) specimens applicable in measurements of crack growth resistance for pipelines.


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    Title :

    Evaluation of crack growth resistance curves for pipeline steels using constraint designed fracture specimens


    Additional title:

    Die Bewertung der Risswachstumswiderstandskurven für Pipeline-Stahl unter Verwendung von entsprechend geformten Bruchproben


    Contributors:


    Publication date :

    2007


    Size :

    10 Seiten, 22 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





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