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Development of empirical potentials for computer simulations of materials

Grant number:18/23172-5
Support Opportunities:Regular Research Grants
Start date: May 01, 2019
End date: April 30, 2020
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
Principal Investigator:Roberto Gomes de Aguiar Veiga
Grantee:Roberto Gomes de Aguiar Veiga
Host Institution: Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas (CECS). Universidade Federal do ABC (UFABC). Santo André , SP, Brazil
City of the host institution:Santo André

Abstract

Atomistic simulations of materials (e.g., molecular dynamics and Monte Carlo) for systems with thousands or even millions of atoms need the interactions of the atoms be described by means of simple analystical functions. Those so-calledinteratomic potentials (or force fields) replace the computationally expensive solution of Schroedinger's equation for the description of atomic bonding. The development of reliable interatomic potentials is therefore a crucial task and, indeed, the lack of them for a lot of materials of great interest represents a seriousdrawback and an important limitation for the advance of this kind of simulation. The main goal of this project is to finish the development of a computer code that employs the simulated annealing algorithm for obtaining interatomic potentialsfrom first principles reference data. Subsequently, it will be used to obtain interatomic potentials for the materials of interest in the research line of the proposalauthor, with a focus on metals and their alloys. (AU)

Articles published in Agência FAPESP Newsletter about the research grant:
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Scientific publications
(The scientific publications listed on this page originate from the Web of Science or SciELO databases. Their authors have cited FAPESP grant or fellowship project numbers awarded to Principal Investigators or Fellowship Recipients, whether or not they are among the authors. This information is collected automatically and retrieved directly from those bibliometric databases.)
CANDELA, R.; GELIN, S.; MOUSSEAU, N.; VEIGA, R. G. A.; DOMAIN, C.; PEREZ, M.; BECQUART, C. S.. Investigating the kinetics of the formation of a C Cottrell atmosphere around a screw dislocation in bcc iron: a mixed-lattice atomistic kinetic Monte-Carlo analysis. JOURNAL OF PHYSICS-CONDENSED MATTER, v. 33, n. 6, . (18/23172-5)
LUU, HOANG-THIEN; VEIGA, ROBERTO G. A.; GUNKELMANN, NINA. Atomistic Study of the Role of Defects on alpha -> epsilon Phase Transformations in Iron under Hydrostatic Compression. METALS, v. 9, n. 10, . (18/23172-5)
TERCINI, MARCELA; DE AGUIAR VEIGA, ROBERTO GOMES; ZUNIGA, ALEJANDRO. Structural changes and kinetics of shear banding in metallic glass composites. Journal of Alloys and Compounds, v. 819, . (18/23172-5)