Development of an Integrated Analytical Model to Predict the Wet Collapse Pressure of Flexible Risers

A flexible riser is a multi-layered pipe device which enables deep-water production by connecting seabed facilities to floating vessels. To withstand huge hydro-static pressure, it is required to have strong collapse capacities. At present, the collapse capacity of a flexible riser is designed based on a "wet collapse'' concept, in which the...

Surface Crack Growth in Metallic Pipes Reinforced with Composite Repair System

Surface cracks are serious threats to the structural integrity of offshore metallic pipes. This dissertation proposes a protocol of composite reinforcement on surface cracked metallic pipes subjected to cyclic loads, aiming to decrease the crack growth rate and prolong the residual fatigue life. The main objective of this dissertation is to...

Residual ultimate strength of seamless metallic pipelines with structural damage

This thesis deals with the structural damage and its corresponding effect on the residual ultimate strength of seamless metallic pipes. The structural damage is here characterized as the type of damage produced by external mechanical interference, considerably undermining the strength and/or stability of the pipes. Not only the aesthetic...