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Special Issue "Modelling and Simulation of Coating"

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A special issue of Coatings (ISSN 2079-6412).

Deadline for manuscript submissions: closed (20 December 2017) | Viewed by 23538

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Special Issue Editor

Prof. Dr. Timon Rabczuk

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Guest Editor

Faculty of Civil Engineering, Bauhaus University Weimar, Marienstrasse 15, 99423 Weimar, Germany
Interests: computational solid mechanics; fracture and failure of solids; fluid-structure interaction
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Special Issue Information

Dear Colleagues,

Modelling and simulation has become a key tool in Engineering and Materials Science. It complements experimental testing and also has the potential to study and identify physical phenomena that cannot be detected experimentally. It has been successfully used to support the design and optimization of new materials and structures. This Special Issue is devoted to computational modeling of coating. In addition, manuscripts on innovative computational methods, which have the potential to be applied to coating or coating materials, can be submitted to this Special Issue. They include approaches ranging from quantum mechanics and molecular dynamics, coarse-grained models, and Monte-Carlo simulations up to classical continuum-based approaches, based on finite element methods or isogeometric analyses. Manuscript covering the following topics are particularly welcome:

Computational methods for moving boundary problems, including fracture, delamination, fluid structure interaction, multi-phase fluid flow, and/or their application to modeling coating.
Computational modelling of interface problems.
Nano-scale modeling of coatings, including QM, MD, UA-MD, CG-MD.
Multiscale methods and their applications to coatings.
Optimization and Uncertainty Analysis.
Multiphysics modeling of coatings.
Phase field models.
Computational Methods for identification and characterization; this includes also machine learning approaches.

Prof. Dr. Timon Rabczuk
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Coatings is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

moving boundary problems
multiscale methods
multiphysics
optimization
uncertainty analysis
phase field models
fluid-structure interaction
material failure

Published Papers (5 papers)

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Research

Open AccessArticle

Simulation of Acoustic Wave Propagation in Aluminium Coatings for Material Characterization

and

Coatings 2017, 7(12), 230; https://doi.org/10.3390/coatings7120230 - 14 Dec 2017

Viewed by 5273

Abstract

Aluminium coatings and their characterization are of great interest in many fields of application, ranging from aircraft industries to microelectronics. Here, we present the simulation of acoustic wave propagation in aluminium coatings via the elastodynamic finite integration technique (EFIT) in comparison to experimental results. The simulations of intensity (I)–defocus (z) curves, obtained by scanning acoustic microscopy (SAM), were first carried out on an aluminium bulk sample, and secondly on a 1 µm aluminium coating deposited on a silicon substrate. The I(z) curves were used to determine the Rayleigh wave velocity of the aluminium bulk sample and the aluminium coating. The results of the simulations with respect to the Rayleigh velocity were corroborated by non-destructive SAM measurements and laser ultrasonic measurements (LUS). Full article

(This article belongs to the Special Issue Modelling and Simulation of Coating)

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Open AccessArticle

Marching-on-in-Degree Time-Domain Integral Equation Solver for Transient Electromagnetic Analysis of Graphene

and

Coatings 2017, 7(10), 170; https://doi.org/10.3390/coatings7100170 - 17 Oct 2017

Cited by 2 | Viewed by 3430

Abstract

The marching-on-in-degree (MOD) time-domain integral equation (TDIE) solver for the transient electromagnetic scattering of the graphene is presented in this paper. Graphene’s dispersive surface impedance is approximated using rational function expressions of complex conjugate pole-residue pairs with the vector fitting (VF) method. Enforcing the surface impedance boundary condition, TDIE is established and solved in the MOD scheme, where the temporal surface impedance is carefully convoluted with the current. Unconditionally stable transient solution in time domain can be ensured. Wide frequency band information is obtained after the Fourier transform of the time domain solution. Numerical results validate the proposed method. Full article

(This article belongs to the Special Issue Modelling and Simulation of Coating)

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Open AccessArticle

Reduced-Order Modeling for and Vibration Characteristics Analysis of a Hard-Coated Mistuned Blisk

Feng Gao

and

Wei Sun

Coatings 2017, 7(7), 103; https://doi.org/10.3390/coatings7070103 - 18 Jul 2017

Cited by 9 | Viewed by 4477

Abstract

This paper develops a damping strategy for the vibration reduction of a mistuned bladed disk (blisk) by depositing hard coating on its blades, and systematically investigates the vibration characteristics of the hard-coated mistuned (HCM) blisk. By using an improved fixed-interface component modal synthesis method (fixed-ICMSM), a reduced-order model (ROM) of the HCM blisk is established. Then, based on the proposed ROM, solutions of eigenvalue equations are carried out to obtain the natural frequencies and mode shapes. Further, modal loss factors and a damping matrix of the HCM blisk are achieved by taking advantage of the modal strain energy method and the proportional damping model, respectively. Moreover, the frequency response function of the HCM blisk, which can exhibit dynamic behaviors, was deduced. Finally, a mistuned blisk with a deposited NiCoCrAlY + YSZ hard coating on both sides of the blades is chosen as a study case to conduct a finite element analysis, and the results are compared with those obtained from the experimental test in terms of natural frequencies and mode shapes. The variation of the natural frequencies, the modal loss factors, and the frequency response function generated by the NiCoCrAlY + YSZ hard coating are studied, and the influence of coating area on damping capacity is further discussed. Full article

(This article belongs to the Special Issue Modelling and Simulation of Coating)

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Open AccessArticle

Application of FEM to Estimate Thermo-Mechanical Properties of Plasma Sprayed Composite Coatings

Rodolphe Bolot

Delphine Aussavy

and

Ghislain Montavon

Coatings 2017, 7(7), 91; https://doi.org/10.3390/coatings7070091 - 30 Jun 2017

Cited by 12 | Viewed by 4894

Abstract

The presence of defects such as voids, inter-lamellar porosities or cracks causes a decrease in the effective thermal conductivity of plasma-sprayed coatings as well as a decrease in corresponding mechanical properties, such as the Young’s modulus. In general, the effective properties of thermal spray coatings are thus very different from that of bulk materials and thus have to be quantified to validate in service performances. A complementary approach allowing us to understand the relationships between the microstructure of a coating and its macro-properties is that of Finite Element Modeling (FEM). The case of composite coatings is more complicated still, due to the presence of different materials. In the present study, thermo-mechanical properties of a plasma-sprayed composite coating were estimated by numerical modeling based on FEM. The method applied uses directly cross-sectional micrographs without simplification, using a one-cell per pixel approach. Characteristics such as the thermal conductivity, the Young’s modulus, the Poisson’s ratio and the dilatation coefficient were considered. The example selected was an AlSi/polyester coating used as an abradable seal in the aerospace industry. Full article

(This article belongs to the Special Issue Modelling and Simulation of Coating)

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Open AccessArticle

Nitrogen Trapping Ability of Hydrogen-Induced Vacancy and the Effect on the Formation of AlN in Aluminum

Duy Dat Vo

Aleksey G. Lipnitskii

Truong Khang Nguyen

and

Thoi Trung Nguyen

Coatings 2017, 7(6), 79; https://doi.org/10.3390/coatings7060079 - 09 Jun 2017

Cited by 4 | Viewed by 4181

Abstract

This paper presents the ternary interaction of N, H, and vacancy point defects and the nitrogen trapping ability of aluminum vacancies induced by hydrogen by means of DFT methods employed in VASP (Vienna Ab initio Simulation Package) and Abinit packages. The obtained vacancy formation energy of 0.65 eV is close to experimental values. Although the N–vacancy complex is unstable with the negative binding energy of −0.51 eV, the stability of H–vacancy–N is proved by the positive binding energy of 0.59 eV and the appearance of the orbital hybridization in the density of state (DOS) of atoms connecting to this complex. Moreover, Al vacancies can trap more than 4 N atoms, which prevents the formation of aluminum nitride and subsequently affects not only the hardness of the Al surface but also many practical applications of AlN coating. Full article

(This article belongs to the Special Issue Modelling and Simulation of Coating)

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