Fatigue crack propagation analysis in offshore mooring chains and the influence of manufacturing residual stresses
Keywords: 
Fracture
Fatigue crack growth modelling
Extended finite element method (XFEM)
Offshore mooring chain
Residual stresses
Issue Date: 
2022
Publisher: 
Elsevier
ISSN: 
0029-8018
Note: 
This is an open access article under the CC BY-NC-ND license
Citation: 
Bergara, A. (Asier); Arredondo, A. (Alberto); Altuzarra, J. (Jorge); et al. "Fatigue crack propagation analysis in offshore mooring chains and the influence of manufacturing residual stresses". Ocean Engineering. (257), 2022, 111605
Abstract
The main objective of this work has been the validation of a methodology to assess fatigue crack propagation in offshore mooring chains under service conditions. For this purpose, analytical Stress Intensity Factor (SIF) so- lutions with step-by-step application of the Paris law and the Extended Finite Element Method (XFEM) imple- mented in the Abaqus® 2018 software have been studied. The fatigue crack propagation analysis is divided in two stages. First, a static analysis -pre-stretch and subsequent unloading-representative of the manufacturing process is performed. Next, the fatigue crack propagation simulation is performed under simplified loading conditions and taking into account the residual stresses induced in the previous analysis. Finally, analytical solutions, numerical simulations and experimental results have been compared. Results justify the use of the Extended Finite Element Method (XFEM) for fatigue crack propagation analysis in mooring chains.

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