ISSN 2687-0568

Model of Ductile Fracture Initiation in Metal/Graphene Composites

Authors
N.V. Skiba 1 , A.G. Sheinerman 1

1 Institute for Problems in Mechanical Engineering, Russian Academy of Sciences, St. Petersburg 199178, Russia

Rev. Adv. Mater. Technol., 2024, vol. 6, no. 3, pp. 89–95
Abstract

We suggest a model that describes the initiation of ductile fracture in metal/graphene composites. Within the model, the cracks are generated at dislocation pileups formed at the metal/graphene interfaces in the course of plastic deformation of composites. The transformation of these cracks to elongated voids and their coalescence leads to ductile failure of metal/graphene composites. For an exemplary case of Al-4Cu/graphene composites we have calculated the critical strain for the ductile fracture initiation as a function of the structural parameters of graphene platelets. Assuming that strain to failure is mainly determined by the strain for fracture initiation, we have calculated the strain to failure of metal/graphene composites. It appeared that strain to failure is maximum in the case of short graphene platelets. The calculated values of strain to failure agree with the experimental data for Al-4Cu/graphene composites

Keywords
Metals; Graphene; Composites; Fracture; Cracks
Foundings

Russian Foundation for Basic Research: 20-53-56036

References
Volume 6, No 3
pages 89-95
History
© 2024 ITMO University.
This is an open access article under the terms
of the CC BY-NC 4.0 license.
Metadata is available under the terms of the CC BY 4.0 license