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A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".

Deadline for manuscript submissions: closed (10 December 2021) | Viewed by 6091

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Prof. Dr. Gennaro Scarselli

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Guest Editor

Department of Engineering for Innovation, University of Salento, Lecce, Italy
Interests: metallic and non-metallic materials; smart materials; metamaterials; biomaterials; materials engineering

Special Issue Information

Dear Colleagues,

Since Orville and Wilbur Wright first decided to power their flyer with a purpose-built, cast aluminum engine to meet the specific requirements for high power to weight ratio, new materials have been necessary to continuously improve and to advance the aerospace engineering. At present, two imperatives are influencing the design process characterizing the aerospace industry: a more efficient aircraft (based on the use of advanced lightweight materials, on the decrease of life cycle costs and particularly operating costs) and reduction of noise and pollutant substance emissions for aircraft and spacecraft typical missions. In light of this, the research for advanced materials in aerospace engineering moves the state of the art for aerospace design a little farther every day. Therefore, the roles of materials engineering, manufacturing techniques, and the need for multidisciplinary optimization in the design process are strongly interlinked.

The goal of this Special Issue on “Advanced Materials for Aerospace Engineering” is to present the latest findings and to promote further research in the areas of advanced materials in aerospace engineering. Contributions are encouraged which cover different areas of the advanced materials engineering, applied to the aerospace industry: metamaterials, smart materials and structures with health management integrated systems, active materials, multiscale material design, nonconventional composite laminates, materials surface treatments, and so on.

This Special Issue welcomes submissions able to provide the new material landscape in which metallic and composite materials alike continue to be developed and improved to offer an ever-improving performance to the aerospace industry.

Prof. Dr. Gennaro Scarselli
Guest Editor

Manuscript Submission Information

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Keywords

Composite materials and layered structures
Lightweight materials
Materials with embedded sensors
Smart materials and structures
Biomaterials
Metamaterials for aerospace

Published Papers (3 papers)

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19 pages, 3152 KiB

Open AccessArticle

A Fast Thermal 1D Model to Study Aerospace Material Response Behaviors in Uncontrolled Atmospheric Entries

by Serena R. M. Pirrone, Camilla Agabiti, Adam S. Pagan and Georg Herdrich

Materials 2022, 15(4), 1505; https://doi.org/10.3390/ma15041505 - 17 Feb 2022

Cited by 4 | Viewed by 1302

Abstract

A preliminary thermal 1D numerical model for studying the demise behavior of stainless steel 316L, silicon carbide (SiC) and carbon fiber reinforced polymer (CFRP) during uncontrolled atmospheric entry is proposed. Test case modeling results are compared to experimental data obtained in the framework of ESA Clean Space initiative: material samples were exposed to different heat flux conditions using the Plasma Wind Tunnel (PWT) facilities at the Institute of Space Systems (IRS) of the University of Stuttgart. This numerical model approximates the heating history of the selected materials by simulating their thermal response and temperature profiles, which have trends similar to the experimental curves that are found. Moreover, when high heat flux conditions are considered, the model simulates the materials’ mass loss due to the ablation process: at the end of the simulation, the difference between the experimental and the modeled results is about 17% for CFRP and 35% for stainless steel. To reduce the model’s uncertainties, the following analysis suggests the need to consider the influence of adequate material thermophysical properties and the physical-chemical processes that affect the samples’ temperature profile and mass loss. Full article

(This article belongs to the Special Issue Advanced Materials for Aerospace Engineering)

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30 pages, 2017 KiB

Open AccessEditor’s ChoiceArticle

Numerically Exploring the Potential of Abating the Energy Flow Peaks through Tough, Single Network Hydrogel Vibration Isolators with Chemical and Physical Cross-Links

by Leif Kari

Materials 2021, 14(4), 886; https://doi.org/10.3390/ma14040886 - 13 Feb 2021

Cited by 3 | Viewed by 2205

Abstract

Traditional vibration isolation systems, using natural rubber vibration isolators, display large peaks for the energy flow from the machine source and into the receiving foundation, at the unavoidable rigid body resonance frequencies. However, tough, doubly cross-linked, single polymer network hydrogels, with both chemical and physical cross-links, show a high loss factor over a specific frequency range, due to the intensive adhesion–deadhesion activities of the physical cross-links. In this study, vibration isolators, made of this tough hydrogel, are theoretically applied in a realistic vibration isolation system, displaying several rigid body resonances and various energy flow transmission paths. A simulation model is developed, that includes a suitable stress–strain model, and shows a significant reduction of the energy flow peaks. In particular, the reduction is more than 30 times, as compared to the corresponding results using the natural rubber. Finally, it is shown that a significant reduction is possible, also without any optimization of the frequency for the maximum physical loss modulus. This is a clear advantage for polyvinyl alcohol hydrogels, that are somewhat missing the possibility to alter the frequency for the maximum physical loss, due to the physical cross-link system involved—namely, that of the borate esterification. Full article

(This article belongs to the Special Issue Advanced Materials for Aerospace Engineering)

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19 pages, 1441 KiB

Open AccessArticle

Are Single Polymer Network Hydrogels with Chemical and Physical Cross-Links a Promising Dynamic Vibration Absorber Material? A Simulation Model Inquiry

by Leif Kari

Materials 2020, 13(22), 5127; https://doi.org/10.3390/ma13225127 - 13 Nov 2020

Cited by 7 | Viewed by 1725

Abstract

Tough, doubly cross-linked, single polymer network hydrogels with both chemical and physical cross-links display a high loss factor of the shear modulus over a broad frequency range. Physically, the high loss factor is resulting from the intensive adhesion–deadhesion activities of the physical cross-links. A high loss factor is frequently required by the optimization processes for optimal performance of a primary vibration system while adopting a dynamic vibration absorber, in particular while selecting a larger dynamic vibration absorber mass in order to avoid an excess displacement amplitude of the dynamic vibration absorber springs. The novel idea in this paper is to apply this tough polymer hydrogel as a dynamic vibration absorber spring material. To this end, a simulation model is developed while including a suitable constitutive viscoelastic material model for doubly cross-linked, single polymer network polyvinyl alcohol hydrogels with both chemical and physical cross-links. It is shown that the studied dynamic vibration absorber significantly reduces the vibrations of the primary vibration system while displaying a smooth frequency dependence over a broad frequency range, thus showing a distinguished potential for the tough hydrogels to serve as a trial material in the dynamic vibration absorbers in addition to their normal usage in tissue engineering. Full article

(This article belongs to the Special Issue Advanced Materials for Aerospace Engineering)

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