000014175 001__ 14175
000014175 005__ 20161115100143.0
000014175 04107 $$aeng
000014175 046__ $$k2016-08-21
000014175 100__ $$aChen, Zengtao
000014175 24500 $$aMolecular dynamics insights into the coalescence of closely- packed voids

000014175 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014175 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014175 506__ $$arestricted
000014175 520__ $$2eng$$aBoth the void clustering effects with fixed-size voids and changing-size voids under uniaxial load are studied via molecular dynamics (MD) method. Large nanovoids up to 50 nm in diameter are focused in this study. The total number of atoms in the system ranges from 0.32 million to 95.4 million. The corresponding stress-strain relation and void volume fraction are monitored during the microstructure evolution of the specimens. For the larger changing-size voids inside the fixed-size simulation box, the critical strain to trigger dislocation shows a very weak dependence on the void size. The dislocation emission pattern is highly subject to the initial intervoid ligament distance (ILD) with a strong clustering effect. For the void cluster, larger voids with short initial ILD tend to reach larger coalescence porosity. The highlands on the void surface, formed due to the presence of dislocation structure, cause the local breakdown of the intervoid ligament.

000014175 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014175 653__ $$a

000014175 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014175 720__ $$aChen, Zengtao
000014175 8560_ $$ffischerc@itam.cas.cz
000014175 8564_ $$s156675$$uhttps://invenio.itam.cas.cz/record/14175/files/PO.SM03-1.02.204.pdf$$yOriginal version of the author's contribution as presented on CD,  page 1844, code PO.SM03-1.02.204
.
000014175 962__ $$r13812
000014175 980__ $$aPAPER