Special Issue "Finite Element Methods in Smart Materials and Polymers"

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Theory and Simulation".

Deadline for manuscript submissions: 15 September 2019.

Special Issue Editors

Guest Editor
Dr. Akif Kaynak

Deakin University, School of Engineering, Faculty of Science & Technology, Geelong, Victoria 3217, Australia
Website | E-Mail
Interests: conducting polymers; stimuli responsive polymers; sensors; actuators; mechanical properties; electrical properties
Guest Editor
Dr. Ali Zolfagharian

School of Engineering, Deakin University, Geelong, Victoria, 3217, Australia
Website | E-Mail
Interests: 4D printing; soft actuators; soft robotics

Special Issue Information

Dear Colleagues,

Functional polymers show unique physical and chemical properties, which can manifest as dynamic responses to external stimuli such as radiation, temperature, chemical reaction, external force, magnetic and electric fields. Recent advances in the fabrication techniques have enabled different types of polymer systems that can be utilized in a wide range of potential applications in smart structures and systems.

This special issue aims to focus on the recent advancements in the finite element modeling of polymer systems using a multiphysics approach in various computational platforms and will consider relevant research papers and review articles for publication.

Dr. Akif Kaynak
Dr. Ali Zolfagharian
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 papers will be 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. Polymers 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 1500 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

  • Finite element analysis of polymer systems
  • Modelling and control of polymer systems, sensors, and actuators
  • Shape memory polymers, hydrogels, polyelectrolytes, elastomers, and silicones
  • Ionic polymers, conductive polymers, batteries, and electrochemical transistors
  • 3D printed polymer systems, structures, sensors, and actuators

Published Papers (2 papers)

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Research

Open AccessArticle
In-Plane Mechanical Behavior of a New Star-Re-Entrant Hierarchical Metamaterial
Polymers 2019, 11(7), 1132; https://doi.org/10.3390/polym11071132
Received: 11 May 2019 / Revised: 20 June 2019 / Accepted: 21 June 2019 / Published: 3 July 2019
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Abstract
A novel hierarchical metamaterial with tunable negative Poisson’s ratio is designed by a re-entrant representative unit cell (RUC), which consists of star-shaped subordinate cells. The in-plane mechanical behaviors of star-re-entrant hierarchical metamaterial are studied thoroughly by finite element method, non-dimensional effective moduli and [...] Read more.
A novel hierarchical metamaterial with tunable negative Poisson’s ratio is designed by a re-entrant representative unit cell (RUC), which consists of star-shaped subordinate cells. The in-plane mechanical behaviors of star-re-entrant hierarchical metamaterial are studied thoroughly by finite element method, non-dimensional effective moduli and effective Poisson’s ratios (PR) are obtained, then parameters of cell length, inclined angle, thickness for star subordinate cell as well as the amount of subordinate cell along x, y directions for re-entrant RUC are applied as adjustable design variables to explore structure-property relations. Finally, the effects of the design parameters on mechanical behavior and relative density are systematically investigated, which indicate that high specific stiffness and large auxetic deformation can be remarkably enhanced and manipulated through combining parameters of both subordinate cell and parent RUC. It is believed that the new hierarchical metamaterial reported here will provide more opportunities to design multifunctional lightweight materials that are promising for various engineering applications. Full article
(This article belongs to the Special Issue Finite Element Methods in Smart Materials and Polymers)
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Graphical abstract

Open AccessArticle
Effects of Intrinsic Properties on Fracture Nucleation and Propagation in Swelling Hydrogels
Polymers 2019, 11(5), 926; https://doi.org/10.3390/polym11050926
Received: 28 April 2019 / Revised: 22 May 2019 / Accepted: 23 May 2019 / Published: 27 May 2019
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Abstract
In numerous industrial applications, the microstructure of materials is critical for performance. However, finite element models tend to average out the microstructure. Hence, finite element simulations are often unsuitable for optimisation of the microstructure. The present paper presents a modelling technique that addresses [...] Read more.
In numerous industrial applications, the microstructure of materials is critical for performance. However, finite element models tend to average out the microstructure. Hence, finite element simulations are often unsuitable for optimisation of the microstructure. The present paper presents a modelling technique that addresses this limitation for superabsorbent polymers with a partially cross-linked surface layer. These are widely used in the industry for a variety of functions. Different designs of the cross-linked layer have different material properties, influencing the performance of the hydrogel. In this work, the effects of intrinsic properties on the fracture nucleation and propagation in cross-linked hydrogels are studied. The numerical implementation for crack propagation and nucleation is based on the framework of the extended finite element method and the enhanced local pressure model to capture the pressure difference and fluid flow between the crack and the hydrogel, and coupled with the cohesive method to achieve crack propagation without re-meshing. Two groups of numerical examples are given: (1) effects on crack propagation, and (2) effects on crack nucleation. Within each example, we studied the effects of the stiffness (shear modulus) and ultimate strength of the material separately. Simulations demonstrate that the crack behaviour is influenced by the intrinsic properties of the hydrogel, which gives numerical support for the structural design of the cross-linked hydrogel. Full article
(This article belongs to the Special Issue Finite Element Methods in Smart Materials and Polymers)
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