Estimation procedure of J-resistance curves for SE(T) fracture specimens using unloading compliance
This work provides an estimation procedure to determine J-resistance curves for pin-loaded and clamped SE(T) fracture specimens using the unloading compliance technique and the η-method. A summary of the methodology upon which J and crack extension are derived sets the necessary framework to determi...
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Veröffentlicht in: | Engineering fracture mechanics 2007-11, Vol.74 (17), p.2735-2757 |
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Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | This work provides an estimation procedure to determine
J-resistance curves for pin-loaded and clamped SE(T) fracture specimens using the unloading compliance technique and the
η-method. 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 vs. displacement curves. The extensive plane-strain analyses enable numerical estimates of the nondimensional compliance,
μ, and parameters
η and
γ for a wide range of specimen geometries and material properties characteristic of structural and pipeline steels. Laboratory testing of an API 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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ISSN: | 0013-7944 1873-7315 |
DOI: | 10.1016/j.engfracmech.2007.01.012 |