|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Nanocomposites V: Structure-Property Relationships in Nanostructured Materials
||Predicting the Failure Mechanisms in Ni-graphene Nanocomposites for Different Loading, Crack Orientations and Graphene Structure
||Scott Muller, Arun K. Nair
|On-Site Speaker (Planned)
Graphene is a 2-D material with superior mechanical, thermal and electrical properties. It also possesses an exceptionally high aspect ratio, which makes it highly desirable for use as a fiber in nanocomposite materials. Previous computational work has predicted that the presence of graphene will have a significant impact on the failure mechanisms of Ni-graphene nanocomposites when a crack is present in the Ni matrix. In this research, we use molecular dynamics to predict how different loading directions and crack orientations will impact the failure mechanisms of Ni-graphene nanocomposites. We study both pristine and polycrystalline graphene as part of our nanocomposite model. We find that different failure mechanisms are prevalent depending on loading direction, crack orientation and graphene structure. We observe that plasticity initiates with Shockley partial dislocations, while catastrophic failure can occur by delamination. Failure mechanisms associated with polycrystalline graphene sheets will be discussed for different misorientation angles.
||Planned: Supplemental Proceedings volume