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Title: Fatigue assessment of underwater CFRP-repaired steel panels using finite element analysis
Authors: Colorado State University.
Coastal and Hydraulics Laboratory (U.S.)
Monitoring Completed Navigation Projects Program (U.S.)
Mahmoud, Hussam.
Como, Anisa.
Riveros, Guillermo A.
Keywords: Carbon fiber reinforced polymers
Steel hydraulic structures
Hydraulic steel structures
CFRP patches
Fatigue assessment
Repaired steel panels
Finite element analysis
Finite element method
Mixed-mode cracking
Computational fluid dynamics
Publisher: Information Technology Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: ERDC/ITL TR ; 14-3.
Description: Technical Report
Abstract: The Nation’s Steel Hydraulic Structures (SHS) are suffering from significant deterioration due to various effects including corrosion, fatigue cracking, impact, and overloads. Current conventional methods used for the repair of steel bridges are accepted as the state-of-practice for the repair of SHS. However, the application of such methods to SHS has often proven to be ineffective as a result of the excessive deterioration present in the structures. The bridge-based crack repair methods were developed primarily for mitigating cracks under Mode I loading, while SHS often experience mix-mode cracking. Therefore, the need for developing repair methodologies that are pertinent to SHS is not just necessary but essential. This report presents the numerical model constructed using a Coupled Eulerian-Lagrangian (CEL) analysis to calculate the stress intensity factors for different repair configurations. The methodology developed to extract the stress intensity factors from an explicit numerical model is also discussed. The model was successful in predicting the experimental results of water hitting a metal plate conducted by Ramsden (1996). Results show that CFRP-repaired plates show significant improvement over non-repaired plates and double-sided prestressed CFRP repairs exhibited the best performance, showing improvements of 5 times or greater compared to unrepaired models, and 2.5 to 3 times better results than single-prestressed and single-sided CFRP repairs.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Technical Report

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