Premium
Elastic properties of fcc crystals of polydisperse soft spheres
Author(s) -
Tretiakov Konstantin V.,
Wojciechowski Krzysztof W.
Publication year - 2013
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201384236
Subject(s) - spheres , materials science , composite material , classical mechanics , physics , astronomy
Elastic properties of fcc phases of soft polydisperse spheres, interacting through inverse‐power pair potentials u ( r ) ∼ r − n , where r is the distance between sphere centers, have been studied by Monte Carlo (MC) simulations in the NpT ensemble with variable shape of the box. The simulations show that both the size polydispersity δ and temperature T strongly influence the elastic properties of the studied system, including Poisson's ratio. Poisson's ratio is found to be negative and decreases with increase of temperature and size polydispersity in the [ 110 ] [ 1 1 ‾ 0 ] direction. Hence, the system is partially auxetic. Additionally, the obtained results indicate that wide range of Poisson's ratio values (from ν [ 110 ] [ 1 1 ‾ 0 ] ≈ − 0.3 to ν [ 110 ] [ 001 ] ≈ 1.1 ) can be obtained by changing the polydispersity, the potential softness 1 / n and direction. Poisson's ratio in [ 110 ] [ 1 1 ‾ 0 ] and [ 110 ] [ 001 ] directions for polydisperse soft spheres with δ = 5 % and dimensionless pressure p * = 37.69 versus dimensionless temperature.