Symmetry and Asymmetry in Composite Materials and Its Applications

A special issue of Symmetry (ISSN 2073-8994). This special issue belongs to the section "Engineering and Materials".

Deadline for manuscript submissions: closed (31 July 2023) | Viewed by 11543

Special Issue Editor

Department of Mechanical Design, Fuzhou University, Fuzhou 350116, China
Interests: material instabilities; strength of materials; damage and fracture mechanisms; strain rates; mechanics-based research in emerging areas such as 3D printing; weaving; biomaterials; ceramics; composites; shape-memory alloys; symmetry system; nonlinear dynamics
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Special Issue Information

Dear Colleagues,

In various composite materials, symmetry and asymmetry are ubiquitous in nature and technology. They represent a class of emerging lightweight and/or energy materials referred to as architected, because their unique properties depend on the geometry of their internal structure. Some types of composite materials include the sandwich structure, metal–organic framework porous materials, and intermetallic porous materials, honeycombs. The static and dynamic mechanical properties of composite materials induce anelasticity, plasticity, and fatigue failure, and a negative Poisson’s ratio, in terms of various structures, is vital to the current and future industries. Here, different types of symmetry and asymmetry can occur, and exploiting the advantages of these types has always been a priority for engineering applications. As a result, research concerning the symmetry and asymmetry analysis of composite materials and systems is of crucial importance for academics and industry professionals alike, in order to enhance and develop the service performance and application of these composite materials.

The aim of this Special Issue is to explore the symmetry and asymmetry in various composite materials, in order to provide a theoretical basis for their improved design and manufacturing. Original research studies and review articles related to the engineering applications of composite materials from a symmetry and asymmetry perspective are encouraged.

Potential topics include, but are not limited to, the following:

  • Mechanical behaviors of composite materials and structural systems;
  • Symmetric and asymmetric characteristics;
  • Non-linearities: dynamic modelling;
  • Experimental testing: methods and instrumentation;
  • Coupling analysis for composite materials;
  • Inverse methods—parameter identification.

Dr. Xin Xue
Guest Editor

Manuscript Submission Information

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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

  • symmetric structures
  • asymmetric structures
  • mechanical behaviors
  • sandwich composites
  • porous composites
  • non-linear systems

Published Papers (6 papers)

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Research

14 pages, 11993 KiB  
Article
Asymmetric Heat Transfer in Aircraft Electrothermal Anti-Icing
by Huajie Xiong, Wenjun Wu, Yijing An, Xiao Li and Zhihong Zhou
Symmetry 2023, 15(3), 599; https://0-doi-org.brum.beds.ac.uk/10.3390/sym15030599 - 26 Feb 2023
Viewed by 1339
Abstract
Aircraft icing is an important cause of air disasters, and electrothermal anti-icing is a common protection method. In this work, the influence of icing meteorological conditions on the anti-icing was studied through an icing wind tunnel experiment on the fairing. Based on the [...] Read more.
Aircraft icing is an important cause of air disasters, and electrothermal anti-icing is a common protection method. In this work, the influence of icing meteorological conditions on the anti-icing was studied through an icing wind tunnel experiment on the fairing. Based on the finite volume method, a transient heat transfer calculation method for electrothermal anti-icing was proposed. The calculated results were compared with the experimental results, and the influence of heating mode and structure layout on the anti-icing effect was analyzed. The results show that the calculated results are in good agreement with the experimental results, and the heat transfer of the anti-icing structure shows obvious asymmetry. First, during heating, the temperature gradient of the structural profile is large, the high temperature is concentrated in the heating layer, and the temperature distribution of the heating layer is relatively uniform. During cooling, the temperature distribution of the structural profile is more uniform, the high temperature is mainly concentrated in the back conduction layer, and the temperature of the outer wall increases first and then decreases from the center to the surroundings. Second, when the spray is turned on, the temperature of the outer wall is significantly reduced, but the temperature of the heating layer hardly changes. Third, the uniform heating mode can simultaneously raise the temperature of the outer wall and reduce the temperature of heating layer. Fourth, while the front conduction layer can significantly affect the temperature of the heating layer and the outer wall, the effect of the back conduction layer is small. However, the back one can be used to control the structural temperature more finely. Full article
(This article belongs to the Special Issue Symmetry and Asymmetry in Composite Materials and Its Applications)
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28 pages, 10508 KiB  
Article
Theoretical Investigation of a Rotating Thermomagnetic Isotropic Transverse-Constrained Annular Cylinder with Generalized Ohm’s Law Using the Moore–Gibson–Thompson Model of Heat Transfer
by Osama Moaaz, Ahmed E. Abouelregal and Jan Awrejcewicz
Symmetry 2023, 15(3), 572; https://0-doi-org.brum.beds.ac.uk/10.3390/sym15030572 - 22 Feb 2023
Cited by 1 | Viewed by 1341
Abstract
On the basis of the analysis of thermoelastic motion, the current research develops a novel model of modified thermoelasticity. The rotating long hollow cylinders with fixed surfaces are considered in a generalized Moore–Gibson–Thompson thermoelastic model (MGTTE) framework, including the modified Ohm’s law. The [...] Read more.
On the basis of the analysis of thermoelastic motion, the current research develops a novel model of modified thermoelasticity. The rotating long hollow cylinders with fixed surfaces are considered in a generalized Moore–Gibson–Thompson thermoelastic model (MGTTE) framework, including the modified Ohm’s law. The cylinders are made of a thermoelastic material that rotates at a uniform rotational speed and is elastic in the transverse direction. The set of equations for the MGT heat conduction in the new model is built under the influence of the electromagnetic field by including a delay time in the context of Green–Naghdi of the third kind (GN-III). The inner boundary of the hollow cylinder is not only restricted but also sensitive to heat loading. The outer surface, on the other hand, is also restricted but insulates the heat. The Laplace transform method is utilized to deal with the differential equations produced in the new domain and transfer the problem to the space domain. The Dubner and Abate method is used to compute dynamically and graphically depict the theoretical findings for an isotropic transverse material. After comparing the results of several thermoelastic theories, the implications for the electromagnetic field are discussed. Full article
(This article belongs to the Special Issue Symmetry and Asymmetry in Composite Materials and Its Applications)
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21 pages, 4307 KiB  
Article
Kinematics Modeling and Singularity Analysis of a 6-DOF All-Metal Vibration Isolator Based on Dual Quaternions
by Chao Zheng, Luming Zou, Zhi Zheng and Xin Xue
Symmetry 2023, 15(2), 562; https://0-doi-org.brum.beds.ac.uk/10.3390/sym15020562 - 20 Feb 2023
Viewed by 1103
Abstract
Driven by the need for impact resistance and vibration reduction for mechanical devices in extreme environments, an all-metal vibration isolator with 6-degree-of-freedom (6-DOF) motion that is horizontally symmetrical was developed. Its stiffness and damping ability are provided by oblique springs in symmetrical arrangement [...] Read more.
Driven by the need for impact resistance and vibration reduction for mechanical devices in extreme environments, an all-metal vibration isolator with 6-degree-of-freedom (6-DOF) motion that is horizontally symmetrical was developed. Its stiffness and damping ability are provided by oblique springs in symmetrical arrangement and a metal–rubber elasto-porous damper. The spring is symmetrically distributed in the center axis of the support load surface. It is necessary to investigate the kinematics and the singularity before conducting multi-body dynamics analysis of the vibration isolator. Based on the theory of dual quaternions, the forward kinematics equations of the isolator were successively derived for theoretical kinematics modeling. In addition, an enhanced Broyden numerical iterative algorithm was developed and applied to the numerical solution of the forward kinematics equations of the vibration isolator. Compared with the traditional rotation-matrix method and Newton–Raphson method, the computational efficiency of the enhanced Broyden numerical iterative algorithm was increased by 680% and 290%, respectively. This was due to the enhanced algorithm without the calculations of any inverse matrix and forward kinematics equations. Finally, according to the forward kinematics Jacobian matrix, the position-singularity trajectory at a given orientation and the orientation-singularity space at a given position are calculated, which provides a basis for the algorithm of the 6-DOF vibration isolator to avoid singular positions and orientations. Full article
(This article belongs to the Special Issue Symmetry and Asymmetry in Composite Materials and Its Applications)
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19 pages, 2572 KiB  
Article
Free Vibration Analysis of a Spinning Composite Laminated Truncated Conical Shell under Hygrothermal Environment
by Xiao Li, Xuanling Zhang and Zhihong Zhou
Symmetry 2022, 14(7), 1369; https://0-doi-org.brum.beds.ac.uk/10.3390/sym14071369 - 03 Jul 2022
Cited by 4 | Viewed by 1560
Abstract
This paper is concerned with free vibration characteristics of a spinning composite laminated truncated conical shell subjected to hygrothermal environment. Hygrothermal strains are introduced into the constitutive law of single-layer material, and fiber orientation lies symmetrically with respect to the midplane of the [...] Read more.
This paper is concerned with free vibration characteristics of a spinning composite laminated truncated conical shell subjected to hygrothermal environment. Hygrothermal strains are introduced into the constitutive law of single-layer material, and fiber orientation lies symmetrically with respect to the midplane of the composite shell. Considering the spin-induced Coriolis and centrifugal forces, as well as initial hoop tension, the governing equations of free vibration of the composite conical shell with hygrothermal effects are derived on the basis of Love’s thin-shell theory and Hamilton’s principle. The solution of the equations is derived using the Galerkin approach. Then, a detailed parametric study on natural frequencies and critical spinning speeds is numerically performed. Results indicate that the Coriolis force induces an asymmetric influence on natural frequencies of forward and backward traveling waves, while the centrifugal force enhances the frequencies of both traveling waves symmetrically. Initial hoop tension plays a major role in the increase of critical spinning angular speed. Temperature, moisture concentration, and design parameters show the significant influence on the free vibration characteristics of the conical shell, and thermal expansion deformation is nonnegligible in the free vibration analysis. Full article
(This article belongs to the Special Issue Symmetry and Asymmetry in Composite Materials and Its Applications)
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17 pages, 8111 KiB  
Article
Vacuum Brazing Effect on the Interlayer Failure Behaviors of Elastic-Porous Sandwich Structure with Entangled Metallic Wire Mesh
by Yuhan Wei, Ruixian Wu, Luming Zou, Niuniu Liu and Xin Xue
Symmetry 2022, 14(5), 977; https://0-doi-org.brum.beds.ac.uk/10.3390/sym14050977 - 10 May 2022
Cited by 1 | Viewed by 1351
Abstract
Particular attention has been given to the complexity of the elastic-porous sandwich structure with entangled metallic wire mesh (EMWM), which is a novel rigid-flexible heterogeneous and symmetrical material. The orthogonal experiment design for vacuum brazing was adopted for sensitivity analysis of the key [...] Read more.
Particular attention has been given to the complexity of the elastic-porous sandwich structure with entangled metallic wire mesh (EMWM), which is a novel rigid-flexible heterogeneous and symmetrical material. The orthogonal experiment design for vacuum brazing was adopted for sensitivity analysis of the key fabrication process on the performances of an EMWM sandwich structure. The shear behaviors of the sandwich structures with different vacuum brazing parameters (e.g., heating rate, brazing temperature, and holding time) were analyzed by mechanical experiments and an interfacial microstructure. The results indicated that the failure behavior of the sandwich structure could be divided into four stages in the mode-I experiment. In addition, the joint quality of the different vacuum brazing process could be shown by the mode-II experiment, and the failure behaviors involves three stages. Additionally, the failure behaviors of the sandwich structure were mainly associated with the deformation of the EMWM core and the strength of the brazing joint. In addition, the relationship between the joint strength and the shear performance of the sandwich structure was revealed through the interfacial microstructure. Furthermore, the importance of the optimized vacuum brazing parameters to fabricate the novel sandwich structure with the best joint performance was demonstrated in this work. Full article
(This article belongs to the Special Issue Symmetry and Asymmetry in Composite Materials and Its Applications)
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14 pages, 9291 KiB  
Article
Development and Investigation of Fully Ventilated Deep Subwavelength Absorbers
by Heng Wang and Qibo Mao
Symmetry 2021, 13(10), 1835; https://0-doi-org.brum.beds.ac.uk/10.3390/sym13101835 - 01 Oct 2021
Cited by 8 | Viewed by 1437
Abstract
A new type of deep subwavelength acoustic metamaterial (AMM) absorber with 100% ventilation is presented in this study. The proposed ventilation absorber consists of coiled-up half-wave resonators (HWRs) and quarter-wave resonators (QWRs). First, the sound absorption and sound transmission performances for absorbers were [...] Read more.
A new type of deep subwavelength acoustic metamaterial (AMM) absorber with 100% ventilation is presented in this study. The proposed ventilation absorber consists of coiled-up half-wave resonators (HWRs) and quarter-wave resonators (QWRs). First, the sound absorption and sound transmission performances for absorbers were analyzed considering the thermal viscosity dissipation. Then, the prototype with ten HWRs and three QWRs composed of acrylic plates was manufactured based on the theoretical model. The acoustic performance of the absorber was tested in an air-filled acoustic impedance tube to determine the sound absorption and transmission loss performances. Good agreement was found between the measured and theoretically predicted results. The experimental results show that the proposed ventilation AMM absorber is able to achieve sound absorption in a range between 330 Hz and 460 Hz with a thickness of only 32 mm (about 3% of the wavelength in the air). Furthermore, the sound transmission loss can achieve 17 dB from 330 Hz to 460 Hz. The main advantage of the proposed absorber is that it can be completely ventilated in duct noise control. Full article
(This article belongs to the Special Issue Symmetry and Asymmetry in Composite Materials and Its Applications)
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