Damping Mechanisms in Polymers and Polymer Composites

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

Deadline for manuscript submissions: 15 February 2025 | Viewed by 1993

Special Issue Editors


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Faculty of Mechanical Engineering and Mechatronics, West Pomeranian University of Technology in Szczecin, 70-310 Szczecin, Poland
Interests: machine tools; finite element method; structural dynamics; vibration analysis; composite structures
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Materials Technologies, West Pomeranian University of Technology in Szczecin, Piastow 19 Av., 70-310 Szczecin, Poland
Interests: polymer nanocomposites; synergistic effect; mineral nanofillers; polymer blends; poly(ethylene 2; 5-furanoate); post-consumer PET-G foils; copolymers; block copolymers; thermoplastic elastomers; copolyesters

Special Issue Information

Dear Colleagues,

The use of polymers and polymer-based composites has constantly increased over the last several decades. Several examples show that composite materials have entered the industry as a viable alternative to traditional materials. They offer a high strength-to-weight ratio, high impact strength, corrosion resistance, and excellent durability. Polymers, as a class of materials, are also known for their unique damping properties and have been widely used to effectively reduce excessive vibrations in a variety of structural applications.

This Special Issue focuses on damping mechanisms present in polymers and polymer composite structures. Moreover, it aims to highlight the progress in the properties and application of these materials in dynamically loaded structures. We invite researchers to share their latest investigations in the form of research articles and reviews.

Dr. Paweł Dunaj
Dr. Izabela Irska
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. Polymers is an international peer-reviewed open access semimonthly journal published by MDPI.

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Keywords

  • polymers
  • polymer composites
  • damping
  • vibration eliminators
  • dampers
  • damping layers
  • vibrations
  • viscoelasticity
  • dynamic properties

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Published Papers (2 papers)

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Research

20 pages, 11339 KiB  
Article
Modeling the Dynamic Properties of Multi-Layer Glass Fabric Sandwich Panels
by Arkadiusz Charuk, Izabela Irska and Paweł Dunaj
Polymers 2024, 16(21), 3074; https://doi.org/10.3390/polym16213074 - 31 Oct 2024
Viewed by 471
Abstract
Sandwich panels are key components of many lightweight structures. They are often subjected to time-varying loads, which can cause various types of vibrations that adversely affect the functionality of the structure. That is why it is of such importance to predict the dynamic [...] Read more.
Sandwich panels are key components of many lightweight structures. They are often subjected to time-varying loads, which can cause various types of vibrations that adversely affect the functionality of the structure. That is why it is of such importance to predict the dynamic properties of both the panels and the structures made of them at the design stage. This paper presents finite element modeling of the dynamic properties (i.e., natural frequencies, mode shapes, and frequency response functions) of sandwich panels made of glass fabric impregnated with phenolic resin. The model reproducing the details of the panel structure was built using two-dimensional, quadrilateral, isoparametric plane elements. Afterwards, the model was subjected to an updating procedure based on experimentally determined frequency response functions. As a result, the average relative error for natural frequencies achieved numerically was 5.0%. Finally, a cabinet model consisting of the analyzed panels was built and experimentally verified. The relative error between the numerically and experimentally obtained natural frequencies was on average 5.9%. Full article
(This article belongs to the Special Issue Damping Mechanisms in Polymers and Polymer Composites)
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15 pages, 7023 KiB  
Article
Damage Resistance of Kevlar® Fabric, UHMWPE, PVB Multilayers Subjected to Concentrated Drop-Weight Impact
by Manal A. Nael, Dmitriy A. Dikin, Natnael Admassu, Omar Bahgat Elfishi and Simona Percec
Polymers 2024, 16(12), 1693; https://doi.org/10.3390/polym16121693 - 14 Jun 2024
Viewed by 1111
Abstract
The impact resistance of layered polymer structures using polyvinyl butyral (PVB) in combination with Kevlar® fabric and ultra-high molecular weight polyethylene (UHMWPE) were fabricated and tested. Methods of wet impregnation and hot-press impregnation and consolidation of fabric with PVB and UHMWPE were [...] Read more.
The impact resistance of layered polymer structures using polyvinyl butyral (PVB) in combination with Kevlar® fabric and ultra-high molecular weight polyethylene (UHMWPE) were fabricated and tested. Methods of wet impregnation and hot-press impregnation and consolidation of fabric with PVB and UHMWPE were used to manufacture multilayer constructs. All sandwich constructs were fixed to the surface of ballistic clay and subject to a free drop-weight test with a conical impactor having a small contact area. All tests were made at the same impact energy of 9.3 J and velocity of 2.85 m/s. The change in the resistance force was recorded using a piezoelectric force sensor at the time intervals of 40 μs. Using experimental force–time history, the change in the impactor’s velocity, the depth of impactor penetration, the energy transformation at various stages of impactor interaction with the sample, and other parameters were obtained. Three indicators were considered as the main criteria for the effectiveness of a sample’s resistance to impact: (1) minimum deformation, bulging, of the panel backside at the moment of impact, (2) minimum absorption of impact energy per areal density, and (3) minimal or, better yet, no destruction of structural integrity. Under the tested conditions, the rigid Kevlar–PVB–Kevlar sandwich at the frontside and relatively soft but flexible UHMWPE–Kevlar–UHMWPE layers in the middle helped to localize and absorb impact energy, while the backside Kevlar–PVB–Kevlar sandwich minimized local bulging providing the best overall performance. The front layer damage area was very shallow and less than two impactor tip diameters. The backside bulging was also less than in any other tested configurations. Full article
(This article belongs to the Special Issue Damping Mechanisms in Polymers and Polymer Composites)
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