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Conventional vs. Innovative Materials, Tradition and Innovation (Second Volume)

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Dear Colleagues,

The capacity to use novel materials or the possibility to apply traditional construction materials in new forms is becoming a factor strongly influencing the capacity of advanced countries to develop new types of civil engineering structures and infrastructures. From this point of view, research on traditional construction materials today requires the application of refined and advanced design tools to update our knowledge, suggesting new forms of implementing traditional materials in new ways. On the other hand, the development of basic design tools for new materials is still needed in the fields where the research of novel engineering materials is at its first steps. This Special Issue in Materials aims to report critical findings, advances, and applications in all structural engineering fields and, most of all, cutting-edge methodologies applied to innovative structural typologies or the advances on innovative materials applied in structures and infrastructures. We solicit contributions covering a wide range of topics, including innovative materials, new experimental methodologies, new design tools, seismic behavior of traditional structures designed with innovative methodologies, retrofit of existing buildings with traditional and innovative materials, guidelines for the design of new structural details, and FEM studies of components.

Prof. Dr. Massimo Latour
Guest Editor

Sabatino Di Benedetto
Guest Editor Assistant

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Keywords

advanced materials
energy storage
hydrogen storage
hydrides
hydrogen absorption/desorption

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16 pages, 8984 KiB

Open AccessArticle

Mechanical Modelling of the Strength and Stiffness of Circular Hollow Section Tube under Localised Transverse Compression and Tension

by Massimo Latour, Sabatino Di Benedetto, Antonella Bianca Francavilla, Alberico Saldutti and Gianvittorio Rizzano

Materials 2023, 16(7), 2641; https://doi.org/10.3390/ma16072641 - 27 Mar 2023

Cited by 2 | Viewed by 1169

Abstract

The component method is a powerful tool for designing and modelling steel beam-to-column connections. Its widespread use is ensured by several formulations currently included in Eurocode 3 part 1.8 for welded and bolted joints. However, the recent use of 3D Laser Cutting Technology (3D-LCT) in the construction market has enlarged the range of solutions, allowing the realisation of tubular columns with passing-through elements. Given the recent development, no design formulations are currently provided for this typology. At this moment, only a few research studies have developed to fill this knowledge gap. At the University of Salerno, since some years, research efforts are ongoing to characterise the flexural strength of connections between Circular Hollow Section columns and passing double-tee beams, suggesting methodologies to predict the behaviour of the resistance and stiffness of this typology and some of its elementary joint components. Within this framework, this paper aims to examine the strength and stiffness of one of the main components of this joint, which was never examined previously, that is the so-called tube under localised transverse tension/compression. Design formulations are derived from a parametric study carried out through numerical simulations of several geometric configurations. Full article

(This article belongs to the Special Issue Conventional vs. Innovative Materials, Tradition and Innovation (Second Volume))

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16 pages, 5519 KiB

Open AccessArticle

2D Hierarchical NiMoO₄ Nanosheets/Activated Carbon Nanocomposites for High Performance Supercapacitors: The Effect of Nickel to Molybdenum Ratios

by Esraa Hamdi, Abdalla Abdelwahab, Ahmed A. Farghali, Waleed M. A. El Rouby and Francisco Carrasco-Marín

Materials 2023, 16(3), 1264; https://doi.org/10.3390/ma16031264 - 01 Feb 2023

Cited by 3 | Viewed by 1280

Abstract

Supercapacitors have the potential to be used in a variety of fields, including electric vehicles, and a lot of research is focused on unique electrode materials to enhance capacitance and stability. Herein, we prepared nickel molybdate/activated carbon (AC) nanocomposites using a facile impregnation method that preserved the carbon surface area. In order to study how the nickel-to-molybdenum ratio affects the efficiency of the electrode, different ratios between Ni-Mo were prepared and tested as supercapacitor electrodes, namely in the following ratios: 1:1, 1:2, 1:3, 1:4, and 1:5. X-ray diffraction, X-ray photoelectron spectroscopy, FESEM, HRTEM, and BET devices were extensively used to analyze the structure of the nanocomposites. The structure of the prepared nickel molybdates was discovered to be 2D hierarchical nanosheets, which functionalized the carbon surface. Among all of the electrodes, the best molar ratio between Ni-Mo was found to be 1:3 NiMo3/AC reaching (541 F·g⁻¹) of specific capacitance at a current density of 1 A·g⁻¹, and 67 W·h·Kg⁻¹ of energy density at a power density of 487 W·Kg⁻¹. Furthermore, after 4000 repetitive cycles at a large current density of 4 A·g⁻¹, an amazing capacitance stability of 97.7% was maintained. This remarkable electrochemical activity for NiMo3/AC could be credited towards its 2D hierarchical structure, which has a huge surface area of 1703 m²·g⁻¹, high pore volume of 0.925 cm³·g⁻¹, and large particle size distribution. Full article

(This article belongs to the Special Issue Conventional vs. Innovative Materials, Tradition and Innovation (Second Volume))

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