Simulation of the Ill-Posed Problem of Reinforced Concrete Corrosion Detection Using Boundary Element Method

Fonna, Syarizal; Ibrahim, Israr M.; Ridha, M.; Huzni, Syifaul; Ariffin, Ahmad Kamal

doi:10.1155/2016/6392702

Cited by 14 publications

(8 citation statements)

References 20 publications

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“…The Laplace equation is expressed by Equation (1) [11][12][13]. The current density (i) and electrical potential (ϕ) can be related by Equation (2) for the domain [15]. In Equation 2, κ is the domain conductivity, n is the outward normal unit, and ∂/∂n is the derivative in the normal direction.…”

Section: Rebar Corrosion Model In Concretementioning

confidence: 99%

Study of inertia weight parameter for boundary element inverse analysis to detect RC corrosion

Fonna¹,

Gunawarman²,

Huzni³

2018

MATEC Web Conf.

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This research studies the effect of an inconstant inertia weight (W) parameter on boundary element inverse analysis (BEIA) to detect the corrosion of reinforcing steel/rebar in concrete. The boundary element method (BEM) and particle swarm optimization (PSO) were used in developing the BEIA. Several measured electrical potential data from halfcell potential measurements were taken as a reference when performing the BEIA. Numerical simulation of reinforced concrete with single corrosion showed that the use of inconstant W with Wup = 0.5 and Wlow ≤ 0.5 did not affect the performance of the BEIA in corrosion detection. It was similar to the performance of the BEIA using a constant W in a previous study (0.25 ≤ W ≤ 0.5). However, the corrosion can still be detected with acceptable accuracy; that is, with an error of less than 5%. Hence, further research is needed to extend the study with Wup > 0.5 for an inconstant W.

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Section: Rebar Corrosion Model In Concretementioning

confidence: 99%

Study of inertia weight parameter for boundary element inverse analysis to detect RC corrosion

Fonna¹,

Gunawarman²,

Huzni³

2018

MATEC Web Conf.

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“…For the RC model, an assumption is made that the CP system has no ion in-and-out. Thus, the system might be mathematically modeled by using the Laplace equation as given in Equation (1) [15][16]. The equation represents the electrical potential (ϕ) for the whole concrete domain (Ω).…”

Section: Bem Formulations For Rc Cpmentioning

confidence: 99%

Simulation the effect of anode-cathode displacement and anode type on reinforced concrete cathodic protection using BEM

et al. 2018

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The aim of the study is to simulate the effect of anode-cathode displacement and anode type on the potential distribution of reinforced concrete (RC) cathodic protection (CP) system using boundary element method (BEM). For the simulation, Laplace equation was used to model the RC domain. The boundary conditions for the anode and cathode (reinforcing steel/rebar) were represented by its polarization curve. By using BEM, the electrical potential values on the whole domain should be calculated. Therefore, the effects of those parameters were studied based on the rebar electrical potential. For the study, the CP system model and geometry were obtained from a previous researcher. The BEM simulation results show that the anode-cathode displacement affects the distribution of electrical potential on the protected reinforcing steel. It was consistent with the previous research result. The results also show, as expected, that the anode type influences the electrical potential value on the rebar. Hence, those parameters should be considered in designing and/or evaluating the RC CP system.

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“…The mathematical models of electrochemical reactions in corrosion are usually regulated using the reaction-diffusion equations. This kind of model has been widely discussed in a number of publications ( Fonna et al, 2013 ; Fonna et al, 2016 ). BEM is a common choice in the field of numerical methods used for modelling of corrosion; however, it can only be used to measure the corrosion at the surface.…”

Section: Introductionmentioning

confidence: 99%

An In-Silico Corrosion Model for Biomedical Applications for Coupling With In-Vitro Biocompatibility Tests for Estimation of Long-Term Effects

Šušteršič

Simsek

Yapıcı

et al. 2021

Front. Bioeng. Biotechnol.

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The release of metal particles and ions due to wear and corrosion is one of the main underlying reasons for the long-term complications of implantable metallic implants. The rather short-term focus of the established in-vitro biocompatibility tests cannot take into account such effects. Corrosion behavior of metallic implants mostly investigated in in-vitro body-like environments for long time periods and their coupling with long-term in-vitro experiments are not practical. Mathematical modeling and modeling the corrosion mechanisms of metals and alloys is receiving a considerable attention to make predictions in particular for long term applications by decreasing the required experimental duration. By using such in-silico approaches, the corrosion conditions for later stages can be mimicked immediately in in-vitro experiments. For this end, we have developed a mathematical model for multi-pit corrosion based on Cellular Automata (CA). The model consists of two sub-models, corrosion initialization and corrosion progression, each driven by a set of rules. The model takes into account several environmental factors (pH, temperature, potential difference, etc.), as well as stochastic component, present in phenomena such as corrosion. The selection of NiTi was based on the risk of Ni release from the implant surface as it leads to immune reactions. We have also performed experiments with Nickel Titanium (NiTi) shape memory alloys. The images both from simulation and experiments can be analyzed using a set of statistical methods, also investigated in this paper (mean corrosion, standard deviation, entropy etc.). For more widespread implementation, both simulation model, as well as analysis of output images are implemented as a web tool. Described methodology could be applied to any metal provided that the parameters for the model are available. Such tool can help biomedical researchers to test their new metallic implant systems at different time points with respect to ion release and corrosion and couple the obtained information directly with in-vitro tests.

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Simulation of the Ill-Posed Problem of Reinforced Concrete Corrosion Detection Using Boundary Element Method

Cited by 14 publications

References 20 publications

Study of inertia weight parameter for boundary element inverse analysis to detect RC corrosion

Study of inertia weight parameter for boundary element inverse analysis to detect RC corrosion

Simulation the effect of anode-cathode displacement and anode type on reinforced concrete cathodic protection using BEM

An In-Silico Corrosion Model for Biomedical Applications for Coupling With In-Vitro Biocompatibility Tests for Estimation of Long-Term Effects

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