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Modeling of Textures and Microstructures of Materials
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Modeling of Textures and Microstructures of 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 (31 May 2021) | Viewed by 7371

Special Issue Editors

Prof. Dr. Aleksander Muc

E-Mail Website
Guest Editor
Institute of Machine Design, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland
Interests: composite materials; numerical methods; experimental methods (thermography, SHM, DIC); static and fatigue damage of materials and constructions; plated and shell structures; optimization algorithms; vibrations; nanomechanics and nanostructures; machine design; mechanical behavior of polymers; flutter problems
Special Issues, Collections and Topics in MDPI journals
Dr. Małgorzata Chwał

E-Mail Website
Guest Editor
Institute of Machine Design, Cracow University of Technology, Warszawska 24, 31-155 Cracow, Poland
Interests: nano- and micro- composites, polymers; mechanics of composite materials; mechanics of solids and structures; micromechanics, biomechanics, nanomechanics, homogenization; finite element method; numerical modeling of nanocomposites and nanostructures; thermographic analysis

Special Issue Information

Dear Colleagues,

The textures and microstructures of materials are decisive features for the design of engineering structures with improved performances. In recent decades, there have been significant research efforts to model a new generation of materials with a directed microstructure, which determines the mechanical behavior under both static and fatigue loading. The understanding and modeling of the microstructure of materials is a truly interdisciplinary endeavor involving materials scientists and engineers of various disciplines. This Special Issue is a proposal to bring together the latest advances in this area from materials science, mechanics, manufacturing, microscopic imaging, and numerical modeling in a single volume.

The observed macroscopic properties of materials are caused by a structure organization on the microstructural level and even nanostructural arrangement. Reflecting deeper on the structure of a material, one can conclude that all materials are heterogeneous on a given scale. However, for some media, inhomogeneity can be observed only after moving to the atomic scale. Heterogeneity affects the physical processes occurring in the selected medium and causes difficulties in the description of such a medium. The modeling and design of new materials also involve the tasks of homogenization and optimization. The texture and microstructure of material depend not only on the material characteristic but also on the mechanical and thermal treatment during technological processes. Modeling in this field considers that various mechanisms also occur on the micro-scale and even nano-scale.

This Special Issue of Materials will follow advances in the modeling of textures and microstructures of materials. It is our pleasure to invite you to contribute your research article, communication, or review to this Special Issue.

Prof. Dr. Aleksander Muc
Dr. Małgorzata Chwał
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

  • Design of mechanical properties of materials
  • Texture and microstructure
  • Influence of manufacturing constrains on material properties
  • Numerical modeling of texture and microstructure of materials
  • Numerical modeling of technological processes
  • Micromechanics and nanomechanics
  • Homogenization and optimal design of macro-, micro- and nanomaterials
  • Imaging of texture and microstructure of materials

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Published Papers (3 papers)

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Research

23 pages, 24270 KiB  
Article
Bounding the Multi-Scale Domain in Numerical Modelling and Meta-Heuristics Optimization: Application to Poroelastic Media with Damageable Cracks
by Albert Argilaga and Efthymios Papachristos
Materials 2021, 14(14), 3974; https://doi.org/10.3390/ma14143974 - 16 Jul 2021
Cited by 6 | Viewed by 2272
Abstract
It is very common for natural or synthetic materials to be characterized by a periodic or quasi-periodic micro-structure. This micro-structure, under the different loading conditions may play an important role on the apparent, macroscopic behaviour of the material. Although, fine, detailed information can [...] Read more.
It is very common for natural or synthetic materials to be characterized by a periodic or quasi-periodic micro-structure. This micro-structure, under the different loading conditions may play an important role on the apparent, macroscopic behaviour of the material. Although, fine, detailed information can be implemented at the micro-structure level, it still remains a challenging task to obtain experimental metrics at this scale. In this work, a constitutive law obtained by the asymptotic homogenization of a cracked, damageable, poroelastic medium is first evaluated for multi-scale use. For a given range of micro-scale parameters, due to the complex mechanical behaviour at micro-scale, such multi-scale approaches are needed to describe the (macro) material’s behaviour. To overcome possible limitations regarding input data, meta-heuristics are used to calibrate the micro-scale parameters targeted on a synthetic failure envelope. Results show the validity of the approach to model micro-fractured materials such as coal or crystalline rocks. Full article
(This article belongs to the Special Issue Modeling of Textures and Microstructures of Materials)
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22 pages, 3833 KiB  
Article
CA Modeling of Microsegregation and Growth of Equiaxed Dendrites in the Binary Al-Mg Alloy
by Andrzej Zyska
Materials 2021, 14(12), 3393; https://doi.org/10.3390/ma14123393 - 18 Jun 2021
Cited by 4 | Viewed by 2340
Abstract
A two-dimensional model based on the Cellular Automaton (CA) technique for simulating free dendritic growth in the binary Al + 5 wt.% alloy was presented. In the model, the local increment of the solid fraction was calculated using a methodology that takes into [...] Read more.
A two-dimensional model based on the Cellular Automaton (CA) technique for simulating free dendritic growth in the binary Al + 5 wt.% alloy was presented. In the model, the local increment of the solid fraction was calculated using a methodology that takes into account changes in the concentration of the liquid and solid phase component in the interface cells during the solidification transition. The procedure of discarding the alloy component to the cells in the immediate vicinity was used to describe the initial, unstable dendrite growth phase under transient diffusion conditions. Numerical simulations of solidification were performed for a single dendrite using cooling rates of 5 K/s, 25 K/s and 45 K/s and for many crystals assuming the boundary condition of the third kind (Newton). The formation and growth of primary and secondary branches as well as the development of component microsegregation in the liquid and solid phase during solidification of the investigated alloy were analysed. It was found that with an increase in the cooling rate, the dendrite morphology changes, its cross-section and the distance between the secondary arms decrease, while the degree of component microsegregation and temperature recalescence in the initial stage of solidification increase. In order to determine the potential of the numerical model, the simulation results were compared with the predictions of the Lipton-Glicksman-Kurz (LGK) analytical model and the experimental solidification tests. It was demonstrated that the variability of the dendrite tip diameter and the growth rate determined in the Cellular Automaton (CA) model are similar to the values obtained in the LGK model. As part of the solidification tests carried out using the Derivative Differential Thermal Analysis (DDTA) method, a good fit of the CA model was established in terms of the shape of the solidification curves as well as the location of the characteristic phase transition temperatures and transformation time. Comparative tests of the real structure of the Al + 5 wt.% Mg alloy with the simulated structure were also carried out, and the compliance of the Secondary Dendrite Arm Spacing (SDAS) parameter and magnesium concentration profiles on the cross-section of the secondary dendrites arms was assessed. Full article
(This article belongs to the Special Issue Modeling of Textures and Microstructures of Materials)
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Graphical abstract

19 pages, 9668 KiB  
Article
Analysis of Contact Deformations in Support Systems Using Roller Prisms
by Krzysztof Nozdrzykowski, Zenon Grządziel and Paweł Dunaj
Materials 2021, 14(10), 2644; https://doi.org/10.3390/ma14102644 - 18 May 2021
Cited by 3 | Viewed by 1786
Abstract
This article presents the results of finite element analyses of the influence of reaction forces on stresses and strains at the contact points of the rollers of prism supports with cylindrical surfaces of the main journals of large-sized crankshafts. The analyses of strains [...] Read more.
This article presents the results of finite element analyses of the influence of reaction forces on stresses and strains at the contact points of the rollers of prism supports with cylindrical surfaces of the main journals of large-sized crankshafts. The analyses of strains and stresses, as well as the depth of their occurrences, in the case of the shaft journal and support rollers were carried out using Hertz contact theory and the finite element method. These calculation results proved to be highly consistent. Additionally, they provide a basis for stating that, in the case under consideration, permanent deformations do not significantly affect the values of the measured geometrical deviations nor the profile forms of the supported main crankshaft journals. Full article
(This article belongs to the Special Issue Modeling of Textures and Microstructures of Materials)
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