Fatigue repair of underwater navigation steel structures using Carbon Fiber Reinforced Polymer (CFRP)

Riveros, Guillermo A.; Mahmoud, Hussam; Lozano, Christine

doi:10.1016/j.engstruct.2018.07.016

Cited by 11 publications

(10 citation statements)

References 22 publications

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“…Extended finite element modelling (XFEM) was used to accomplish a logarithmic cyclic analysis (Paris' Law) with a C and m of 1.91e-04 and 1.16 respectively, and a GI and GII of 204 and 51 Mpa-m respectively. Authentication efforts focused on a general model approach [19] and the experiments described in [20]. The numerical experiments were analysed using identical methods and have been authenticated with experimental data; a discussion of the data and numerical methods are in [19][20].…”

Section: Model Overview and Numerical Experimentsmentioning

confidence: 99%

“…Authentication efforts focused on a general model approach [19] and the experiments described in [20]. The numerical experiments were analysed using identical methods and have been authenticated with experimental data; a discussion of the data and numerical methods are in [19][20]. The verification experiments were executed under Mode I loading with the CFRP application as in the laboratory experiments.…”

Section: Model Overview and Numerical Experimentsmentioning

confidence: 99%

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Blind prediction of FRP repairs for multiaxial fatigue cracks on Hydraulic Steel Structures

Riveros

Lozano

2019

MATEC Web Conf.

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Currently, over 80% of the navigation steel structures (NSS) within the United States' inland waterway system have reached or exceeded their useful design life. Age has caused deterioration of the design boundary conditions (e.g. diagonal relaxation and quoin block deterioration) leading to overloads and causing multi-axial fatigue cracking. Furthermore, corrosion and deterioration of the protective system accelerate the fatigue crack growth rate. This paper presents numerical experiments to evaluate the viability of fiber reinforce polymer (FRP) retrofit methods as an alternative to repair mix-mode fatigue cracking. The numerical experiments use a combination of tension, shear, and bending forces to develop different cracking patterns. Afterward, an analysis is conducted to demonstrate the effectiveness of the repair techniques on the defined problem. The need for a retrofit method is first motivated by the lack of effective and easily implemented retrofit techniques for underwater structures when mix-mode fatigue cracks are present. Extended finite element (XFEM), with Paris' Law and non-linear bond-slip behaviour of the adhesive, calibrates the crack propagation and strains surrounding the crack tip. The research then focuses on the discussion of the parametric analyses of large steel plate subjected to a combination of tension, shear and bending loads with and without CFRP repairs.

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Section: Model Overview and Numerical Experimentsmentioning

confidence: 99%

Section: Model Overview and Numerical Experimentsmentioning

confidence: 99%

Blind prediction of FRP repairs for multiaxial fatigue cracks on Hydraulic Steel Structures

Riveros

Lozano

2019

MATEC Web Conf.

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show abstract

“…The majority of fatigue and fracture repair methods were developed for Mode I cracking in the bridge industry [8,9,10,11]. Due to the mixed mode stress states and submerged environment, NSSs require a different repair method.…”

Section: Introductionmentioning

confidence: 99%

“…Over the past five years, several NSSs’ have had fatigue and fractures repaired with a new repair method, carbon fiber reinforced polymer (CFRP) patches [8,9]. This research is part of a five-year project to extend the useful fatigue life of NSS.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Adhesive Bond-Slip Behavior on the Capacity of Innovative FRP Retrofits for Fatigue and Fracture Repair of Hydraulic Steel Structures

Lozano

Riveros

2019

Materials

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Over eighty percent of the navigation steel structures (NSS) in the United States have highly deteriorated design boundary conditions, resulting in overloads that cause fatigue cracking. The NSSs’ highly corrosive environment and deterioration of the protective system accelerate the fatigue cracking and cause standard crack repair methods to become ineffective. Numerous studies have assessed and demonstrated the use of carbon fiber reinforced polymers (CFRP) to rehabilitate aging and deteriorated reinforced concrete infrastructure in the aerospace industry. Due to the increase of fatigue and fracture failures of NSS and the shortage of research on CFRP retrofits for submerged steel structures, it is imperative to conduct research on the effects of CFRP repairs on NSS, specifically on the adhesive’s chemical bonding to the steel substrate. This was accomplished by developing a new analytical algorithm for CFRP bond-slip behavior, which is based on Volkersen’s contact shear single lap joint (SLJ) connection. The algorithm was validated by experimental results of fatigue center-cracked large steel plates repaired with CFRP patches. The state of stresses at the crack tip are largely influenced by a combination of the crack tip plasticity radius and overall bond surface area.

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Linear and nonlinear guided wave based debonding monitoring in CFRP-reinforced steel structures

2023

Construction and Building Materials

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Fatigue repair of underwater navigation steel structures using Carbon Fiber Reinforced Polymer (CFRP)

Cited by 11 publications

References 22 publications

Blind prediction of FRP repairs for multiaxial fatigue cracks on Hydraulic Steel Structures

Blind prediction of FRP repairs for multiaxial fatigue cracks on Hydraulic Steel Structures

Effects of Adhesive Bond-Slip Behavior on the Capacity of Innovative FRP Retrofits for Fatigue and Fracture Repair of Hydraulic Steel Structures

Linear and nonlinear guided wave based debonding monitoring in CFRP-reinforced steel structures

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