Competition between plastic deformation and fracture processes in metal-graphene layered composites

• Published in: Journal of physics. D, Applied physics Vol. 47; no. 49; pp. 495302 - 11
• Main Authors: Ovid'ko, I A, Sheinerman, A G
• Format: Journal Article
• Language: English
• Published: IOP Publishing 10.12.2014
• Subjects: Competition; Composite materials; composites; fracture; Fracture mechanics; Graphene; Graphical user interface; Laminates; Multilayers; Plastic deformation; strength
• ISSN: 0022-3727; 1361-6463
• DOI: 10.1088/0022-3727/47/49/495302

Competition between plastic deformation and fracture processes in metal-graphene layered composites is theoretically described. In the framework of the suggested approach, plastic deformation and fracture processes controlling the flow stress/strength of a metal-graphene layered composite are the transfer of plastic deformation across a graphene interface and the nanocrack formation initiated by stress fields of lattice dislocations stopped near a graphene interface. With these processes theoretically described, we reveal strength characteristics of metal-graphene layered composites as functions of their key structural parameters, including the metallic layer thickness λ and graphene layer thickness h. The results of our theoretical examination are consistent with the corresponding experimental data (Kim et al 2013 Nat. Commun. 4 2114).