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Ključne besede: pyrolysis process, end-of-life tires, composite materials, sustainability, bending strengt
Objavljeno v DiRROS: 26.02.2026; Ogledov: 195; Prenosov: 80
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Povzetek: Magnetoelectric composites integrate the coupling between magnetic and piezoelectric materials to create new functionalities for potential technological applications. This coupling is typically achieved through the exchange of magnetic, electric, or elastic energy across the interfaces between the different constituent materials. Tailoring the strength of the magnetoelectric effect is primarily accomplished by selecting suitable materials for each constituent and by optimizing geometrical and microstructural designs. Various composite architectures, such as (0-3), (2-2), (1-3) and core-shell connectivities, have been studied to enhance magnetoelectric coupling and other required physical properties in composites. This review examines the latest advancements in magnetoelectric materials, focusing on the impact of different interphase connectivity types on their properties and performance. Before exploring magnetic-electric coupling, a brief overview of the historical background of multiferroic magnetoelectric composites is provided. Fundamental concepts underlying the magnetoelectric effect, piezoelectricity, and the magnetostrictive effect are explained, including their origins and examples of these materials' properties. So far, three types of magnetoelectric composite connectivities have been investigated experimentally: particulate composites (0-3), laminated and thin films (2-2), sticks embedded in matrix, core-shell particles, and coaxial fibers.An outlook on the prospects and scientific challenges in the field of multiferroic magnetoelectric composites is given at the end of this review.
Ključne besede: strain-mediated coupling, multiferroic, magnetoelectric, laminated composites, particulate composite, core shell composites
Objavljeno v DiRROS: 19.01.2026; Ogledov: 270; Prenosov: 66
Celotno besedilo (2,82 MB)
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Povzetek: A three-step model for the performance-based numerical simulations of the fire response of steel–RC two-layered beam-like composite structures is presented and validated. The first step consists of the determination of the evolution of temperatures in the structure׳s surroundings. Moisture and the heat transfer through the RC layer and the conduction of heat over the steel layer are obtained in the second step. In concrete, the transfer of water vapour, dry air, and free water is discussed as well as the evaporation and liquefaction phenomena and the dehydration of concrete and its thermal and mechanical degradation. Within the framework of the third step, a geometrically and materially non-linear mechanical response of the structure is proposed accounting for interlayer slips and uplifts as well as for various material-related phenomena such as the material hardening/softening and creep. The governing equations are solved numerically. An efficient, novel strain-based finite element formulation is introduced for the mechanical analysis. Due to its generality and consideration of several different possible non-linear material, geometrical, and interlayer contact phenomena and their couplings the model can be of a use to a broader fire science community for exploring the impact of different physical parameters on the results of the addressed numerical simulations, thereby providing directions for further research. In the paper a case of such a study is also demonstrated exploring the contribution of the steel sheet and the flexibility of the interlayer connection of a standard trapezoidal steel–RC slab to its ultimate fire resistance. A reasonable contribution of the sheet is proved if the stiffness ratio between the integrated and the external tensile reinforcement of the RC plate is low provided that the contact connection is sufficiently stiff.
Ključne besede: Steel–RC composite structures Fire Slip Uplift Heat and moisture transfer Contact stiffness
Objavljeno v DiRROS: 26.09.2025; Ogledov: 362; Prenosov: 174
Celotno besedilo (1,31 MB)
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Povzetek: Cellulose is a renewable, biodegradable, cost-effective, and easy-to-process natural biopolymer. Because of its dielectric, piezoelectric, and mechanical performance, cellulose and its composites are often used as a matrix, filler, substrate, gel electrolyte, and dielectric layer for flexible energy storage devices. They offer easy fabrication strategies and excellent mechanical properties. In this mini-review, we summarized the principles of dielectric and energy storage features of cellulose composites and factors affecting their dielectric properties, mainly exploring the incorporation of various filler materials in the cellulose matrices and cellulose materials acting as different types of fillers. Moreover, the fabrication strategies, structural design, and matrix-filler interactions of cellulose composites enhance their dielectric properties as systematically reviewed. This review summarizes the current state-of-the-art progress of cellulose dielectric composites, challenges, and future outlook for green dielectric and energy storage devices. The review suggests that optimizing the filler type, cellulose fiber content, fabrication techniques, and structural design can significantly enhance the dielectric properties and energy storage capacity of cellulose composites.
Ključne besede: cellulose composites, dielectric properties, energy storage, natural biopolymers, filler–matrix interaction, flexible electronic devices, sustainable materials, piezoelectric properties, gel electrolyte, composite structural design
Objavljeno v DiRROS: 24.06.2025; Ogledov: 633; Prenosov: 251
Celotno besedilo (12,96 MB)
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Ključne besede: hybrid composite, hand lay-up method, mechanical properties, personal protective equipment
Objavljeno v DiRROS: 24.04.2025; Ogledov: 809; Prenosov: 383
Celotno besedilo (1,07 MB)
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