Naslov
Atomistic modeling of different loading paths in single crystal copper and aluminum

Autori
Pezer, Robert ; Trapić, Ivan

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
The 11th International Conference on Multiaxial Fatigue & Fracture (ICMFF11)

Mjesto i datum
Sevilla, Španjolska, 01.06.2016. - 03.06.2016

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Molecular dynamics ; Fatigue ; Multiaxial ; Copper ; Aluminum ; LAMMPS

Sažetak
Utilizing molecular dynamics integration model we have investigated relevant physical processes caused by different loading paths at the atomic level in Cu and Al monocrystal specimen. At the atomic level interactions are modeled by standard realistic Embedded Atom Method (EAM) potentials. Realistic potentials provide us with detailed information about non- equilibrium dynamics including crystal structure defects, vacancies and dislocations. In particular, we have obtained result that shows increase in total energy of the crystal during loading (especially cyclic) that provides direct quantitative evidence of the metal weakening. For the basic response, we have deformed cooper and aluminum single crystal according to simple mode I loading path and whole range of multiaxial loading-paths including cyclic repetition. We calculate equivalent stress- strain diagrams as well as several dislocation graphs providing clear signatures of anisotropic response to multiaxial loading.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Metalurgija, Strojarstvo

POVEZANOST RADA