Please use this identifier to cite or link to this item: https://www.um.edu.mt/library/oar/handle/123456789/18651
Title: Negative thermal expansion from disc, cylindrical, and needle shaped inclusions
Authors: Grima, Joseph N.
Ellul, Brian
Gatt, Ruben
Attard, Daphne
Keywords: Finite element method
Expansion (Heat)
Elasticity
Chemical models
Issue Date: 2013-10
Publisher: Wiley-VCH
Citation: Grima, J. N., Ellul, B., Gatt, R., & Attard, D. (2013). Negative thermal expansion from disc, cylindrical, and needle shaped inclusions. Physica Status Solidi (b), 250(10), 2051-2056.
Abstract: The concept of reducing the thermal expansion of composites by exploiting the thinning that is observed when a conventional material is mechanically stretched (the Poisson's effect) is explored through finite elements (FE) simulations with the scope of assessing the potential of such systems to exhibit negative thermal expansion (NTE). It is shown that systems made from hard highly expanding needle, cylindrical or coin shaped inclusions embedded within a soft matrix with a high positive Poisson's ratio having low coefficients of thermal expansion may exhibit NTE under certain conditions. In the case of the coin-shaped inclusions, the NTE is maximum in the direction orthogonal to the surface of the coins and in the case of systems with needle-shaped inclusions, the NTE is maximum in the direction orthogonal to the length of the needles.
URI: https://www.um.edu.mt/library/oar//handle/123456789/18651
Appears in Collections:Scholarly Works - FacSciChe
Scholarly Works - FacSciMet

Files in This Item:
File Description SizeFormat 
Negative thermal expansion from disc, cylindrical, and needle shaped inclusions.pdf
  Restricted Access
Negative thermal expansion from disc, cylindrical, and needle shaped inclusions1.84 MBAdobe PDFView/Open Request a copy


Items in OAR@UM are protected by copyright, with all rights reserved, unless otherwise indicated.