Simulation of deformation and fracture processes in nanocompositesстатьяИсследовательская статья
Информация о цитировании статьи получена из
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Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 11 ноября 2019 г.
Аннотация:The paper studies the processes of deformation and fracture in
nanocomposites. The study was carried out by the method of mathematical
modeling. The behavior of the nanosystem was described by the molecular
dynamics apparatus. A modified immersed atom method was used as a
potential. Demonstrated theoretical approaches to the study of the
mechanical properties of nanocosposites and the processes of their failure.
Formulas for calculating the stress, strain tensors and displacement were
given. To maintain a constant temperature in the nanosystem, a Nose –
Hoover thermostat was used. The failure of nanocomposites was considered
in the process of tension and shear deformation. Pure aluminum, a composite
with an aluminum matrix and a filler in the form of spherical iron particles,
and a composite with an aluminum matrix and a filler in the form of a
cylindrical iron fiber were used as samples. After the filler was introduced into
the nanocomposite, the sample was relaxed to ensure its more stable state.
The simulation allowed us to establish the basic laws of changes in the atomic
structure of the matrix and nanocomposite fillers during deformation and
fracture. It is shown that the processes of deformation and failure of
nanocomposites substantially depend both on the structure and types of
loading of the material. The results of the research can be used to study the
processes of deformation of nanocomposite materials with promising
functional properties.