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OTO 077/2000

Fracture mechanics assessment of fatigue cracks in offshore tubular structures

The use of T-butt joints to calculate stress intensity factors (SIFs) for weld toe cracks in tubular
joints has been proposed by many researchers, including Dijkstra et al. (TNO, Delft), Pang
(Nanyang Technological University), Fu et al. (British Gas), Maddox (TWI) and Burdekin et al.
(UMIST). The reasons for using T-butt joint solutions to approximate tubular joint SIFs are,
first, because tubular joint solutions only exist for a few very basic tubular joint configurations,
and, secondly, because to derive solutions for the many different geometries and configurations of tubular joint used in practice would require an unmanageable number of analyses.

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Updated 2010-03-19