Special Issue "Nanotechnology in Construction"

A special issue of Technologies (ISSN 2227-7080). This special issue belongs to the section "Construction Technologies".

Deadline for manuscript submissions: closed (31 August 2015) | Viewed by 11036

Special Issue Editors

Department of Civil Engineering, University of Salerno, 900527 Fisciano, SA, Italy
Interests: mechanics of solids and structures; multiscale mechanics; computational mechanics; advanced mechanical modeling of new materials and structures; innovative composite materials
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Raimondo Luciano
E-Mail Website
Guest Editor
Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, 03043 Cassino (FR), Italy

Special Issue Information

Dear Colleagues,

Due to their excellent electric, thermal and mechanical properties, carbon nanotubes are currently considered very prominent materials in the field of nanotechnologies. An important target in industry is that of developing new structures and devices for micro-electro-mechanical systems (MEMS) and nano-electro-mechanical systems (NEMS). Carbon nanotubes are also suitable as reinforcement in composite materials, improving the mechanical properties when compared to those of traditional composites. Nanostructures exhibit size effects, whose evaluation is commonly carried out by nonlocal continuum mechanics. The basic point of this approach consists in defining suitable constitutive models which lead to reliable results. In this Special Issue, we highlight theoretical and numerical models in order to investigate the size-dependent behavior of structures, possibly composite, at nano-scale. Example content to be included in this issue:

  1. New nonlocal constitutive models;
  2. Static analysis, buckling and vibration of nanobeams, nanoplates and nanoshells;
  3. Functionally graded nanostructures;
  4. Homogenization of nanocomposites.

Prof. Dr. Eng. Luciano Feo
Prof. Dr Eng. Raimondo Luciano
Guest Editors

Manuscript Submission Information

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Keywords

  • nonlocal theories
  • functionally graded materials
  • carbon nanotubes
  • size effects
  • nanobeams
  • nanoplates
  • nanoshells
  • nanocomposites
  • homogenization

Published Papers (2 papers)

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Research

Article
Fate and Transport of Fire-Born Particles in Porous Media
Technologies 2016, 4(1), 2; https://doi.org/10.3390/technologies4010002 - 31 Dec 2015
Cited by 5 | Viewed by 4941
Abstract
A variety of hazardous substances may be generated from the burning materials during fire extinguishing operations, depending on the location, type, and place of the fire. As a result, the fire-extinguishing water may act as a carrier for these nano- and micro-sized fire-born [...] Read more.
A variety of hazardous substances may be generated from the burning materials during fire extinguishing operations, depending on the location, type, and place of the fire. As a result, the fire-extinguishing water may act as a carrier for these nano- and micro-sized fire-born particles, including various types of associated contaminants, and may cause contamination of soil and groundwater resources. While airborne particles from fires have been studied, it is currently not well known what types of nano- and micro-sized contaminants are typically carried by the fire-extinguishing water and how these contaminants can be transported in the natural environment. The main purpose of this study was to increase the understanding about the occurrence and physical and chemical properties of nanoparticles commonly found in discharge water from fire extinguishing operations. The current study was based on collection of original samples from a fire location. A detailed characterization of the particles present in the extinguishing water was performed including both quantification of contaminants associated with the particles (such as metals and polycyclic aromatic hydrocarbons (PAHs) as well as measurement of properties related to the mobility of these particles through porous media. Such mobility properties include size distributions of the particles and the porous media, surface charges and solution chemistry). Results indicate that metals and PAHs are present in both finer and relatively larger fire-born particles. The particles larger than 11 μm were not mobile in porous media. The mobility of the finer particles (<11 μm) was generally high but was dependent on the solution chemistry. Low mobility of large particles in porous media indicates that a large amount of the contamination can likely be trapped in the top soil layer even though the fire extinguishing water infiltrates. Full article
(This article belongs to the Special Issue Nanotechnology in Construction)
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Article
Refined 2D and Exact 3D Shell Models for the Free Vibration Analysis of Single- and Double-Walled Carbon Nanotubes
Technologies 2015, 3(4), 259-284; https://doi.org/10.3390/technologies3040259 - 04 Dec 2015
Cited by 31 | Viewed by 5692
Abstract
The present paper talks about the free vibration analysis of simply supported Single- and Double-Walled Carbon Nanotubes (SWCNTs and DWCNTs). Refined 2D Generalized Differential Quadrature (GDQ) shell methods and an exact 3D shell model are compared. A continuum approach (based on an elastic [...] Read more.
The present paper talks about the free vibration analysis of simply supported Single- and Double-Walled Carbon Nanotubes (SWCNTs and DWCNTs). Refined 2D Generalized Differential Quadrature (GDQ) shell methods and an exact 3D shell model are compared. A continuum approach (based on an elastic three-dimensional shell model) is used for natural frequency investigation of SWCNTs and DWCNTs. SWCNTs are defined as isotropic cylinders with an equivalent thickness and Young modulus. DWCNTs are defined as two concentric isotropic cylinders (with an equivalent thickness and Young modulus) which can be linked by means of the interlaminar continuity conditions or by means of van der Waals interactions. Layer wise approaches are mandatory for the analysis of van der Waals forces in DWCNTs. The effect of van der Waals interaction between the two cylinders is shown for different DWCNT lengths, diameters and vibration modes. The accuracy of beam models and classical 2D shell models in the free vibration analysis of SWCNTs and DWCNTs is also investigated. Full article
(This article belongs to the Special Issue Nanotechnology in Construction)
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