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Experimental measure and model validation of COD of cracked pipes under bending
Last modified: 2013-06-27
Abstract
In order to apply the “Leak Before Break” (LBB) Analysis is very important to know the cracks
area. Particularly for pipes under bending the area depends from crack position related to the bending plane.
Considering symmetrical cracks respect to the flexural plane cannot be a conservative assumption. In this work
has been carried out an experimental investigation in order to evaluate COD distribution for off-axis cracks on
pipes under bending. Have been tested pipes with different thickness and different cracks lengths and
orientations. COD distribution has been monitored by digital image correlation (DIC). Experimental data have
been used to validate an analytical model (HCM Hodograph Cone Method) previously proposed by the authors.
area. Particularly for pipes under bending the area depends from crack position related to the bending plane.
Considering symmetrical cracks respect to the flexural plane cannot be a conservative assumption. In this work
has been carried out an experimental investigation in order to evaluate COD distribution for off-axis cracks on
pipes under bending. Have been tested pipes with different thickness and different cracks lengths and
orientations. COD distribution has been monitored by digital image correlation (DIC). Experimental data have
been used to validate an analytical model (HCM Hodograph Cone Method) previously proposed by the authors.
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