Effect of pitting corrosion on local strength of hold frames of bulk carriers (1st report)

Nakai, Tatsuro; Matsushita, Hisao; Yamamoto, Norio; Arai, Hironori

doi:10.1016/j.marstruc.2004.10.001

Cited by 205 publications

(91 citation statements)

References 2 publications

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“…There has been significant effort to assess the strength capacity of steel marine structures with uniform corrosion [39,40] and localized corrosion damage using both experimental and finite element (FE) methods [34,41], varying structural geometries, corrosion extent, loading/boundary conditions and structural initial imperfections. While the influence of pitting corrosion has been investigated in depth over the last decade [42][43][44][45][46], grooving corrosion has gained increasing attention only recently [47][48][49]. Considering that both corrosion types will result in stress/strain concentrations, however, only a limited number of studies have addressed the mechanically assisted reactions on the corrosion performance of marine structures loaded to an ultimate condition.…”

Section: Introductionmentioning

confidence: 99%

Mechano-electrochemical modelling of corroded steel structures

Wang

Wharton

Shenoi

2016

Engineering Structures

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A numerical methodology is established to study the mechanoelectrochemical performance of corroded steel structures under external and internal stresses. Results show that mechanical stimuli (elastic/plastic deformation) increase the local anodic current density, and thus the corrosion behavior dynamically responds to the loading conditions. The current density increment for a multi-component stress system is largely dependent on both hydrostatic pressure and equivalent plastic strain. Moreover, the mechano-electrochemical corrosion is more affected by plastic deformation, resulting in localized areas being more anodic. Existing corrosion introduces extra stress/strain concentration, which further reduces the structural strength capacity and intensifies the corrosion damage. ABSTRACTA numerical methodology is established to study the mechano-electrochemical performance of corroded steel structures under external and internal stresses. Results show that mechanical stimuli (elastic/plastic deformation) increase the local anodic current density, and thus the corrosion behavior dynamically responds to the loading conditions. The current density increment for a multi-component stress system is largely dependent on both hydrostatic pressure and equivalent plastic strain. Moreover, the mechanoelectrochemical corrosion is more affected by plastic deformation, resulting in localized areas being more anodic. Existing corrosion introduces extra stress/strain concentration, which further reduces the structural strength capacity and intensifies the mechano-chemical corrosion damage.

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Section: Introductionmentioning

confidence: 99%

Mechano-electrochemical modelling of corroded steel structures

Wang

Wharton

Shenoi

2016

Engineering Structures

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“…(a) Pitted surface (b) Cross-sectional view Figure 1 Pitted web plate of the hold frame of a bulk carrier [10].…”

Section: Notation Armentioning

confidence: 99%

“…Nakai and his collaborators [10,11] performed a series of nonlinear finite-element (FE) analyses with pitted plates subjected to in-plane compressive loads and bending moments in order to investigate their behaviours. They also established a method for prediction of ultimate strength of plate models with pitted corrosion.…”

Section: Pitted Platesmentioning

confidence: 99%

“…As an example of localised corrosion, reference may be made to the corrosion of hold frames in way of cargo holds of bulk carriers which have coating such as tar epoxy paints, Fig. 1 [10]. Generally, pitting corrosion is defined as an extremely localised corrosive attack and sites of the corrosive attack are relatively small compared to the overall exposed surface [3].…”

Section: Introductionmentioning

confidence: 99%

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Degradation of the compressive strength of unstiffened/stiffened steel plates due to both-sides randomly distributed corrosion wastage

Mohammad

Nouri²,

Khedmati

et al. 2010

Lat. Am. j. solids struct.

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Degradation of the compressive strength of unstiffened/stiffened steel plates due to both-sides randomly distributed corrosion wastage Abstract The paper addresses the problem of the influence of randomly distributed corrosion wastage on the collapse strength and behaviour of unstiffened/stiffened steel plates in longitudinal compression. A series of elastic-plastic large deflection finite element analyses is performed on both-sides randomly corroded steel plates and stiffened plates. The effects of general corrosion are introduced into the finite element models using a novel random thickness surface model. Buckling strength, post-buckling behaviour, ultimate strength and post-ultimate behaviour of the models are investigated as results of both-sides random corrosion.

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“…Corrosion is one of the limiting factors for the service life of ships and offshore structures due to the corrosive marine environment leading to thickness reduction in metallic structures [1,2]. It is therefore essential that these structures are monitored nondestructively to predict and hence prevent failure.…”

Section: Introductionmentioning

confidence: 99%

Monitoring of corrosion damage using high-frequency guided ultrasonic waves

Chew

Fromme

2015

AIP Conference Proceedings

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Due to adverse environmental conditions corrosion can develop during the life cycle of industrial structures, e.g., offshore oil platforms, ships, and desalination plants. Both pitting corrosion and generalized corrosion leading to wall thickness loss can cause the degradation of the integrity and load bearing capacity of the structure. Structural health monitoring of corrosion damage in difficult to access areas can in principle be achieved using high frequency guided waves propagating along the structure from accessible areas. Using standard ultrasonic transducers with single sided access to the structure, high frequency guided wave modes were generated that penetrate through the complete thickness of the structure. Wall thickness reduction was induced using accelerated corrosion in a salt water bath. The corrosion damage was monitored based on the effect on the wave propagation and interference of the different modes. The change in the wave interference was quantified based on an analysis in the frequency domain (Fourier transform) and was found to match well with theoretical predictions for the wall thickness loss. High frequency guided waves have the potential for corrosion damage monitoring at critical and difficult to access locations from a stand-off distance.

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Effect of pitting corrosion on local strength of hold frames of bulk carriers (1st report)

Cited by 205 publications

References 2 publications

Mechano-electrochemical modelling of corroded steel structures

Mechano-electrochemical modelling of corroded steel structures

Degradation of the compressive strength of unstiffened/stiffened steel plates due to both-sides randomly distributed corrosion wastage

Monitoring of corrosion damage using high-frequency guided ultrasonic waves

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