Symmetry Breaking in Nonlinear Mechanics

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

Deadline for manuscript submissions: 30 June 2026 | Viewed by 1278

Special Issue Editors


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Guest Editor
Department of Engineering Enzo Ferrari, University of Modena and Reggio Emilia, 41125 Modena, Italy
Interests: nonlinear vibrations; gear dynamics; chaos; metamaterial and meta-structures

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Guest Editor
Department of Engineering Enzo Ferrari, University of Modena and Reggio Emilia, 41125 Modena, Italy
Interests: nonlinear dynamics; vibrations; stability; shells; mechanical transmissions; gears; fluid structure interaction
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Engineering Enzo Ferrari, University of Modena and Reggio Emilia, 41125 Modena, Italy
Interests: nonlinear dynamics; vibration control; fluid structure interaction; shells and meta-structures; biomechanics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nonlinearity and complexity are inherent features of various applications and phenomena, and directly influence the performance of systems due to the materials, structures, and dynamics of models. Symmetry, as a fundamental principle, serves as an initial tool for understanding, designing, and controlling systems. In practice, the system may behave differently from the designed pattern due to the initial conditions, boundary conditions or manufacturing processes, leading to a response that depends upon unpredictable deviations from the properties and conditions of the system.

This Special Issue, entitled "Symmetry Breaking in Nonlinear Mechanics", aims to investigate the intricate interplay between symmetry and asymmetry across a range of applications in engineering science and nonlinear phenomena.

We invite researchers to present work that explores theoretical, experimental, and computational approaches to investigating the role of nonlinearity and initial sensitivity, as well as work presenting innovative insights and practical applications that leverage symmetry to address the challenges associated with nonlinear and complex systems.

The scope of this Special Issue includes, but is not limited to, the following topics:

  • Symmetry and complexity in the design and analysis of dynamics.
  • Nonlinearity emanates from structures, properties, and materials of systems.
  • Symmetry-breaking phenomena, chaos, and bifurcation.
  • Metamaterials and meta-structures.
  • Advanced modeling techniques for nonlinear and complex systems.
  • Applications of symmetry and complexity in wave propagation, energy transfer, and mechanical behavior.
  • Nonlinear dynamics and vibrations.
  • Biomechanics
  • Fluid Structure Interaction
  • Powertrain

Dr. Moslem Molaie
Prof. Dr. Francesco Pellicano
Dr. Antonio Zippo
Guest Editors

Manuscript Submission Information

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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. Symmetry 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 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

  • symmetry/asymmetry systems
  • chaos and bifurcation analyses
  • nonlinear dynamics and vibrations
  • discrete and continuous systems
  • metamaterial and meta-structures
  • nonlinear phenomena and complex systems

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Published Papers (1 paper)

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Research

27 pages, 6483 KB  
Article
Microcontroller-Based PPF Control of a CFRP–Honeycomb Composite Panel
by Antonio Zippo, Moslem Molaie, Erika Borellini and Francesco Pellicano
Symmetry 2026, 18(4), 588; https://doi.org/10.3390/sym18040588 - 30 Mar 2026
Viewed by 588
Abstract
In this study, an active vibration control (AVC) strategy is effectively used on a system made of a honeycomb polymer–paper core and carbon fiber-reinforced polymer (CFRP) plates. A cost-effective and practical solution based on an AVC system has been developed and tested using [...] Read more.
In this study, an active vibration control (AVC) strategy is effectively used on a system made of a honeycomb polymer–paper core and carbon fiber-reinforced polymer (CFRP) plates. A cost-effective and practical solution based on an AVC system has been developed and tested using a microcontroller unit (MCU) from Texas Instruments. The control system is studied by applying out-of-plane disturbances to the composite panel via an electrodynamic shaker, by exciting the identified mode shapes obtained through experimental modal analysis, i.e., impact tests. The actuator chosen for the AVC system is a Macro Fiber Composite (MFC) patch. Multiple analog signal processing circuits were developed to scale and shift the signal at the input and output of the MCU. The proposed control algorithm is based on a positive position feedback (PPF) technique. Modal analysis was performed to identify the natural frequencies and mode shapes of the structure, which are essential for the design and tuning of the modal-based PPF controller. This analysis also enabled optimal sensor and actuator placement, ensuring effective targeting and control of the dominant vibration modes. Then, a series of tests were performed using pure sine excitations at frequencies of interest, close to the 2nd and 8th mode at 25.13 Hz and 129 Hz, respectively. The results of the experiments revealed a velocity attenuation of 55.8% to 76.9% and a Power Spectral Density (PSD) attenuation of 5.8 dB to 12.8 dB, depending on the mode under study. Owing to the size and mass properties of the Macro Fiber Composite (MFC) patches, the control system is very much suitable for automobile and aerospace applications. Full article
(This article belongs to the Special Issue Symmetry Breaking in Nonlinear Mechanics)
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