Atomistic exploration of deformation mechanisms in metallic nanowires. ABC as a promising approach to overcome timescale limitations of molecular dynamics

dc.contributor.authorSun, Cheng
dc.contributor.examiningcommitteeLiang, Xihui (Mechanical Engineering)
dc.contributor.examiningcommitteeWang, Jay (Mechanical Engineering)
dc.contributor.supervisorDeng, Chuang
dc.date.accessioned2025-05-27T17:15:37Z
dc.date.available2025-05-27T17:15:37Z
dc.date.issued2025-05-12
dc.date.submitted2025-05-12T21:49:50Zen_US
dc.date.submitted2025-05-27T17:05:50Zen_US
dc.degree.disciplineMechanical Engineering
dc.degree.levelMaster of Science (M.Sc.)
dc.description.abstractThis thesis provides an atomistic exploration of deformation mechanisms in single-crystal metallic nanowires subjected to bending and shear stresses. A significant aspect of the work involves evaluating the ABC method as a promising computational approach to overcome the inherent timescale limitations of Molecular Dynamics (MD) simulations. Through comparative analyses, distinct deformation mechanisms such as dislocation nucleation and propagation, twinning, detwinning, twin-boundary migration, and five-fold twin (FFT) boundary formation were systematically identified. While MD simulations were constrained by short simulation timescales, ABC successfully captured slow, time-dependent plastic deformation phenomena such as gradual twin-boundary migrations and stacking fault formations. Additionally, both methods revealed the formation of FFT boundaries, occurring rapidly in MD and gradually in ABC simulations, highlighting ABC’s capability to mimic long-term deformation behaviors. This work emphasizes the directional dependence of deformation modes and underscores ABC’s potential to significantly extend computational capabilities. Ultimately, these findings provide critical insights into nanowire deformation mechanisms, laying the groundwork for future research focused on optimizing nanomaterial reliability and performance.
dc.description.noteOctober 2025
dc.identifier.urihttp://hdl.handle.net/1993/39094
dc.language.isoeng
dc.subjectMaterials Science
dc.subjectNanowire
dc.subjectLammps
dc.subjectMolecular Dynamics
dc.titleAtomistic exploration of deformation mechanisms in metallic nanowires. ABC as a promising approach to overcome timescale limitations of molecular dynamics
local.subject.manitobano
Files
Original bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
Sun_Cheng.pdf
Size:
18.75 MB
Format:
Adobe Portable Document Format
Description:
License bundle
Now showing 1 - 1 of 1
Loading...
Thumbnail Image
Name:
license.txt
Size:
770 B
Format:
Item-specific license agreed to upon submission
Description: