NDLI: Evaluation of Crack Growth Resistance Curves for Pipeline Steels Using Constraint Designed Fracture Specimens

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Cravero, Sebastian Ruggieri, Claudio
Copyright Year	2006
Abstract	This work provides an estimation procedure to determine J-resistance curves for SE(T) 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 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.
Sponsorship	Pipeline Division
Starting Page	969
Ending Page	978
Page Count	10
File Format	PDF
ISBN	0791842622
DOI	10.1115/IPC2006-10075
Volume Number	Volume 2: Integrity Management; Poster Session; Student Paper Competition
Conference Proceedings	2006 International Pipeline Conference
Language	English
Publisher Date	2006-09-25
Publisher Place	Calgary, Alberta, Canada
Access Restriction	Subscribed
Subject Keyword	Geometry American petroleum institute Temperature Pipelines Materials properties Plane strain Fracture (materials) Steel Displacement Stress Testing
Content Type	Text
Resource Type	Article

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