Development and validation of a low-cost CTOD procedure
conference paper
A low-cost variation of CTOD testing is proposed. This variation follows BS7448, but has several nonstandard deviations, including:
• Using a fixed notch width of 0.5 mm.
• Using fatigue pre-cracks that are shorter than normal requirements to save the associated expense.
• Using Single Edge Notched 3-point Bending (SENB) specimens with cross sections that are b=10 by w=20 mm, independent of material thickness.
• Use of crosshead measured displacements in lieu of secondary displacement sensors.
• Fast testing, which includes a time to maximum load of 1-2 seconds.
Each deviation is justified with analysis, simulation, and/or testing. The proposed CTOD variation is then demonstrated on 25 mm thick Weldox 700E
• Using a fixed notch width of 0.5 mm.
• Using fatigue pre-cracks that are shorter than normal requirements to save the associated expense.
• Using Single Edge Notched 3-point Bending (SENB) specimens with cross sections that are b=10 by w=20 mm, independent of material thickness.
• Use of crosshead measured displacements in lieu of secondary displacement sensors.
• Fast testing, which includes a time to maximum load of 1-2 seconds.
Each deviation is justified with analysis, simulation, and/or testing. The proposed CTOD variation is then demonstrated on 25 mm thick Weldox 700E
Topics
TNO Identifier
476415
ISBN
978-1-880653-99-9
Publisher
International Society of Offshore and Polar Engineers (ISOPE)
Source title
Proceedings of the twenty-third (2013) International Offshore and Polar Engineering Anchorage, Alaska, USA, June 30-July 5, 2013
Pages
234-241
Files
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