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Assessment of structural integrity of subsea wellhead system: analytical and numerical study

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journal contribution
posted on 11.05.2015, 12:17 authored by Angelo R. Maligno, R. Citarella, Vadim V. Silberschmidt, Constantinos Soutis
Subsea wellhead systems exposed to severe fatigue loading are becoming increasingly a significant problem in offshore drilling operations due to their applications in wells with higher levels of pressure and temperature, situated at larger depths and in harsher environments. This has led to a substantial increase in the weight and size of offshore equipment, which, in combination with different loading conditions related to the environmental factors acting on the vessel and riser, has greatly increased the loads acting on subsea well systems. In particular, severe fatigue loading acting on the subsea wellhead system was detected. For this reason, a combined analytical and numerical study investigating the critical effect of crack depth on the overall structural integrity of subsea wellhead systems under cyclic loading was carried out. The study is based on a Linear Elastic Fracture Mechanics (LEFM) approach.



  • Mechanical, Electrical and Manufacturing Engineering

Published in

Frattura ed Integrita Strutturale




97 - 119


MALIGNO, A.R. ... et al, 2015. Assessment of structural integrity of subsea wellhead system: analytical and numerical study. Frattura ed Integrita Strutturale, 31, pp. 97 - 119.


Gruppo Italiano Frattura


AM (Accepted Manuscript)

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This article was published in the journal, Frattura ed Integrita Strutturale and is available here with the kind permission of the publisher.