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Numerical Simulation and Experimental Studies of Wave Phenomena in Composite Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Simulation and Design".

Deadline for manuscript submissions: closed (20 January 2022) | Viewed by 4736

Special Issue Editors

Dr. Mikhail V. Golub

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Guest Editor
Institute for Mathematics, Mechanics and Informatics, Kuban State University, 350040 Krasnodar, Russia
Interests: applied mathematics; numerical analysis; computational mechanics; wave propagation; mechanics of solids; machine learning methods; non-destructive evaluation; structural health monitoring; acoustic metamaterials
Special Issues, Collections and Topics in MDPI journals
Dr. Artem A. Eremin

E-Mail Website
Guest Editor
Institute for Mathematics, Mechanics and Informatics, Kuban State University, 350040 Krasnodar, Russia
Interests: applied mathematics; numerical analysis and computational mechanics; wave dynamics; BEM technique; computer modelling (FORTRAN, MATLAB); simulation of ultrasonic wave phenomena; experimental techniques for elastic guided waves; wave-based non-destructive testing and structural health monitoring
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

It is our pleasure to invite you to submit a manuscript to the forthcoming Special Issue “Numerical Simulation and Experimental Studies of Wave Phenomena in Composite Materials” in Materials.

At present, composite materials and smart structures exhibiting enhanced properties are used extensively in numerous engineering applications, such as aerospace and wind energy industries, civil construction, etc. Investigation of ultrasonic wave phenomena in complex composite structures is among the topical problems in the mechanics of composites, with a variety of applications. In large part, this relates to the fundamentals of wave-based nondestructive evaluation and structural health monitoring aiming at early-stage damage detection and material condition evaluation. Another up-to-date topic being inspired by complex wave phenomena in inhomogeneous waveguides is the design of a novel class of composite materials, the so-called phononic crystals and acoustic metamaterials, which provide unusual elastodynamic properties and allow manipulating ultrasonic wave propagation. For these and for many other cases, studies of dynamic behavior of complex three-dimensional composite materials remain a topical issue.

As a prime step in understanding and analysis of complex wave phenomena in smart composite materials, efficient and accurate mathematical models and numerical simulation tools are required which are suitable for fast parametric studies at the development stage or for the implementation in real electromechanical devices and systems. In particular, they should take into account peculiarities of material microstructures, coupled mechanical and electrical fields, complex shapes of sensors and transducers, as well as wave scattering by localized or distributed inhomogeneities. Such simulation problems are often very complex and cannot be treated efficiently with simple analytical or conventional numerical tools, inspiring, therefore, the development of advanced computational methods for 3D wave dynamic problems.

Another challenging aspect of wave phenomenon studies relates to experimental techniques for wave excitation, detection, and visualization in complex composite and smart structures. Their advancement is important for the adjustment of the developed simulation models, verification of theoretical results, and enhancement of our understanding of wave-related physics.

It is our pleasure to invite you to submit a manuscript for this Special Issue related to experimental and numerical studies of wave phenomena in composite materials. Full papers, short communications, and reviews are all welcome.

Dr. Mikhail V. Golub
Dr. Artem A. Eremin
Guest Editors

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. Materials is an international peer-reviewed open access semimonthly 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 2600 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

  • Composites
  • Simulation
  • Numerical analysis
  • Wave propagation
  • Computational mechanics
  • Elastic/acoustic metamaterials and phononic crystals
  • Experimental studies
  • Structural health monitoring
  • Nondestructive evaluation

Published Papers (2 papers)

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Research

32 pages, 20780 KiB  
Article
Elastodynamic Behaviour of Laminate Structures with Soft Thin Interlayers: Theory and Experiment
by Maria V. Wilde, Mikhail V. Golub and Artem A. Eremin
Materials 2022, 15(4), 1307; https://doi.org/10.3390/ma15041307 - 10 Feb 2022
Cited by 6 | Viewed by 1373
Abstract
Laminate structures composed of stiff plates and thin soft interlayers are widely used in aerospace, automotive and civil engineering encouraging the development of reliable non-destructive strategies for their condition assessment. In the paper, elastodynamic behaviour of such laminate structures is investigated with emphasis [...] Read more.
Laminate structures composed of stiff plates and thin soft interlayers are widely used in aerospace, automotive and civil engineering encouraging the development of reliable non-destructive strategies for their condition assessment. In the paper, elastodynamic behaviour of such laminate structures is investigated with emphasis on its application in ultrasonic based NDT and SHM for the identification of interlayer mechanical and interfacial contact properties. A particular attention is given to the practically important frequency range, in which the wavelength considerably exceeds the thickness of the film. Three layer model with spring-type boundary conditions employed for imperfect contact simulation is used for numerical investigation. Novel effective boundary conditions are derived via asymptotic expansion technique and used for analysis of the peculiar properties of elastic guided waves in considered laminates. It is revealed that the thin and soft film influences the behaviour of the laminate mainly via the effective stiffnesses being a combination of the elastic moduli of the film, its thickness and interface stiffnesses. To evaluate each of these parameters separately (or to figure out that the available experimental data are insufficient), a step-wise procedure employing the effective boundary conditions is proposed and tested versus the laser Doppler vibrometry data for Lamb waves in Aluminium/Polymer film/Alumunium structure. A good agreement between theoretical and experimental data is demonstrated for a certain symmetric laminate specimen. The possibility of using film-related thickness resonance frequencies to estimate the film properties and contact quality is also demonstrated. Additionally, the rich family of edge waves is also investigated, and the splitting of fundamental edge waves into pairs is revealed. Full article
(This article belongs to the Special Issue Numerical Simulation and Experimental Studies of Wave Phenomena in Composite Materials)
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19 pages, 6349 KiB  
Article
Effect of Hammer Type on Generated Mechanical Signals in Impact-Echo Testing
by Richard Dvořák and Libor Topolář
Materials 2021, 14(3), 606; https://doi.org/10.3390/ma14030606 - 28 Jan 2021
Cited by 5 | Viewed by 2753
Abstract
The impact-echo diagnostic method is a well-known nondestructive pulse compression test method, which can be relatively easily used for the testing of concrete and reinforced concrete elements. The evaluation of the measurement with this method is based on the analysis of the signal [...] Read more.
The impact-echo diagnostic method is a well-known nondestructive pulse compression test method, which can be relatively easily used for the testing of concrete and reinforced concrete elements. The evaluation of the measurement with this method is based on the analysis of the signal itself in the time and frequency domains. This allows acquisition of information on the velocity of the mechanical wave, the resonant frequency of the specimen or on the presence of internal defects. The ability to interpret these measurements depends on the experience of the diagnostic technician. The advent of classification algorithms in the field of machine learning has brought an increasing number of applications where the entire interpretation phase can be considerably simplified with the help of classification models. However, this automated evaluation procedure must be provided with the information of whether the signal acquired by the test equipment has actually been measured under optimally set conditions. This paper proposes a procedure for the mutual comparison of different measuring setups with a variable tip type, hammer handle and impact force. These three variables were used for a series of measurements which were subsequently compared with each other using multi-criteria evaluation. This offers a tool for the evaluation of measured data and their filtering. As an output of the designed method, each measurement is marked by a score value, which represents how well the acquired signal fit the weight demands for each observed feature of the signal. The method allows the adjustment of selected demands for a specific application by means of set thresholds. This approach enables the understanding of characteristics of the signal in the automated pre-processing of measured data, where computing power is limited. Thus, this solution is potentially suitable for remote long-term observations with sensor arrays or for acoustic emission signals pre-processing. Full article
(This article belongs to the Special Issue Numerical Simulation and Experimental Studies of Wave Phenomena in Composite Materials)
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