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Homogenization for Composite Materials
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Homogenization for Composite Materials

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: closed (31 December 2020) | Viewed by 8147

Special Issue Editors

Prof. Dr. Ki-Weon Kang

E-Mail Website
Guest Editor
Department of Mechanical and Automobile Engineering, Kunsan National University, Gunsan 54150, Republic of Korea
Interests: composites; mechanical properties; fatigue; finite element analysis; homogenization
Special Issues, Collections and Topics in MDPI journals
Dr. Ji-Won Jin

E-Mail Website
Guest Editor
Korea Testing Laboratory, System Verification and Validation Center, System & Energy Division, 87, Digital-ro-26-gil, Guro-gu, Seoul 08389, Republic of Korea
Interests: carbon nanotube; equivalent mechanical properties; finite element analysis; homogenization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Fiber-reinforced composites have been used extensively in aerospace, automotive, and wind energy industries. Composite materials have excellent mechanical properties, such as specific stiffness and specific strength. Composite material has a structure wherein reinforcing fiber and a matrix, each with unique characteristics, are physically coupled on a microscopic scale. The complicated microstructure and the behaviors of the constituents lead to the inherent characteristics of composite materials, such as strong heterogeneity and anisotropy.

The homogenization method is one of the most useful methods to assess the mechanical properties of composite materials, which takes into consideration the behavior of the constituents and their microstructure. The method is a procedure whereby a heterogeneous media is converted into an equivalent material model that is energetically equivalent to the heterogeneous media.

This Special Issue will bring together leading researchers in the field of composite materials to introduce the latest research and technology using homogenization techniques. Various studies can be submitted on equivalent properties, thermal conductivity, electrical conductivity, etc. through homogenization techniques of composite materials.

Prof. Dr. Ki-Weon Kang
Dr. Ji-Won Jin
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. Applied Sciences 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 2400 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

  • Homogenization method
  • Equivalent mechanical properties
  • Multiscale approach
  • Composites materials
  • Microstructure and macrostructure
  • Representative volume element

 

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Published Papers (2 papers)

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Research

13 pages, 4400 KiB  
Article
A Study on the Evaluation of Effective Properties of Randomly Distributed Gas Diffusion Layer (GDL) Tissues with Different Compression Ratios
by Haksung Lee, Chan-Woong Choi, Ki-Weon Kang and Ji-Won Jin
Appl. Sci. 2020, 10(21), 7407; https://doi.org/10.3390/app10217407 - 22 Oct 2020
Cited by 7 | Viewed by 3394
Abstract
The gas diffusion layer (GDL) typically consists of a thin layer of carbon fiber paper, carbon cloth or nonwoven and has numerous pores. The GDL plays an important role that determines the performance of the fuel cell. It is a medium through which [...] Read more.
The gas diffusion layer (GDL) typically consists of a thin layer of carbon fiber paper, carbon cloth or nonwoven and has numerous pores. The GDL plays an important role that determines the performance of the fuel cell. It is a medium through which hydrogen and oxygen are transferred and serves as a passage through which water, generated by the electrochemical reaction, is discharged. The GDL tissue undergoes a compressive loading during the stacking process. This leads to changes in fiber content, porosity and resin content due to compressive load, which affects the mechanical, chemical and electrical properties of the GDL and ultimately determines fuel cell performance. In this study, the geometry of a GDL was modeled according to the compression ratios (10%, 20%, 30%, 40% and 50%), which simulated the compression during the stacking process and predicted the equivalent properties according to the change of GDL carbon fiber content, matrix content and pore porosity, etc. The proposed method to predict the equivalent material properties can not only consider the stacking direction of the material during stack assembling process, but can also provide a manufacturing standard for fastening compressive load for GDL. Full article
(This article belongs to the Special Issue Homogenization for Composite Materials)
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14 pages, 3031 KiB  
Article
Multi-Scale Probabilistic Analysis for the Mechanical Properties of Plain Weave Carbon/Epoxy Composites Using the Homogenization Technique
by Ji-Won Jin, Byung-Wook Jeon, Chan-Woong Choi and Ki-Weon Kang
Appl. Sci. 2020, 10(18), 6542; https://doi.org/10.3390/app10186542 - 18 Sep 2020
Cited by 8 | Viewed by 3759
Abstract
Probabilistic analyses of carbon fabric composites were conducted using the Monte Carlo simulation based on a homogenization technique to evaluate the mechanical properties of composites and their stochastic nature. First, the homogenization analysis was performed for a micro-level structure, which fiber and matrix [...] Read more.
Probabilistic analyses of carbon fabric composites were conducted using the Monte Carlo simulation based on a homogenization technique to evaluate the mechanical properties of composites and their stochastic nature. First, the homogenization analysis was performed for a micro-level structure, which fiber and matrix are combined. The effective properties obtained from this analysis were compared with the results from the rule of mixture theory to verify the homogenization analysis. And, tensile tests were conducted to clearly evaluate the result and the reliability was verified by comparing the results of the tensile tests and homogenization analysis. In addition, the Monte Carlo simulation was performed based on homogenization analyses to consider the uncertainties of the micro-level structure combined of fiber and matrix. Next, the results of this simulation were applied to the macro-level structure combined of the tow and matrix to perform the Monte Carlo simulation based on the homogenization technique. Finally, the sensitivity analysis was conducted to identify the effect of constituents of the carbon plain weave composite and the linear correlation of the micro- and macro-level structures combined of the fiber/matrix and tow/matrix, respectively. The findings of this study verified that the effective properties of the plain weave carbon/epoxy composite and their uncertainties depended on the properties of the carbon fiber and epoxy, which are the basic constituents of plain weave carbon/epoxy composites. Full article
(This article belongs to the Special Issue Homogenization for Composite Materials)
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