An Integration of 3D Discrete Dislocation Dynamics with Numerical Tensile Testing

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F18%3A00500894" target="_blank" >RIV/68081723:_____/18:00500894 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.12693/APhysPolA.134.779" target="_blank" >http://dx.doi.org/10.12693/APhysPolA.134.779</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.12693/APhysPolA.134.779" target="_blank" >10.12693/APhysPolA.134.779</a>

Result language

angličtina

Original language name

An Integration of 3D Discrete Dislocation Dynamics with Numerical Tensile Testing

Original language description

Design of materials for severe high temperature mechanical exposures can be assisted by a newly developed 3D discrete dislocation dynamics model which can be tailored for a numerical simulation of hot tensile tests. The 3D discrete dislocation dynamics model is based upon the linear theory of elasticity. The dislocation structure is represented by short straight segments. This allows a straightforward calculation of the stress fields and, subsequently, the driving forces at any point in the simulation cell as a linear sum of stress contributions of individual dislocation segments, osmotic forces, externally applied stress, misfit stresses, the Peierls stress etc. Furthermore, the model addresses interaction between dislocation segments and rigid incoherent spherical precipitates. The dislocation displacement is calculated from the equations of motion, which address both dislocation glide and climb. The external loadings enter the model as an applied strain during a tensile test, from which the resolved shear stress is calculated. The resolved shear stress is calculated from the Hooke law and it is constant throughout the simulated volume during one integration step. Furthermore, a benchmark study is performed in which the 3D discrete dislocation dynamics model of the tensile test focuses on a migration of a low angle dislocation boundary in a field of rigid spherical precipitates. Obtained results are compared to former calculations during which the applied stress was kept constant.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/LQ1601" target="_blank" >LQ1601: CEITEC 2020</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Acta Physica Polonica. A

ISSN

0587-4246

e-ISSN

—

Volume of the periodical

134

Issue of the periodical within the volume

3

Country of publishing house

PL - POLAND

Number of pages

4

Pages from-to

779-782

UT code for WoS article

000453257500038

EID of the result in the Scopus database

2-s2.0-85058952869