Abstract
Mixed-dimensional nanomaterials composed of one-dimensional (1D) and two-dimensional (2D) nanomaterials, such as graphene-silver nanowire (AgNW) composite sandwiched structures, are promising candidates as building blocks for multifunctional structures and materials. However, their mechanical behavior and failure mechanism have not yet been fully understood. In this work, we have performed integrated experimental, theoretical, and numerical studies to explore the performance and failure modes of graphene-AgNW composite under tensile and impact loading conditions. In situ tensile tests using a nano indenter, implemented with a push-to-pull device and a laser-induced projectile impact test system, are used to shed light on load-bearing mechanisms in graphene-AgNW composites. Multiple failure modes have been observed in both experimental setups and analyzed with numerical and theoretical models. Results show that in the tensile loading the distribution of AgNW, as characterized by the effective free length, is the key parameter determining the failure mode. As for the impact failure scenarios, compared with failure modes observed in pure graphene cases, the mechanical reinforcing effect of AgNW will transform the failure mode from a scattered tensile fracture along radial directions to a shear failure that is constrained in a relatively local domain. Theoretical analysis using shear lag modeling, Timoshenko plate theory, molecular dynamics modeling, and finite element modeling approaches are adopted to further establish the failure modes.
Recommended Citation
Y. Li and C. Wei and S. E. Kooi and D. Veysset and C. Guo and Y. Gan and Y. Zhuo and G. Chen and M. Naraghi and K. A. Nelson and C. Wu, "Tough Monolayer Silver Nanowire-Reinforced Double-Layer Graphene," ACS Applied Materials and Interfaces, American Chemical Society, Jan 2024.
The definitive version is available at https://doi.org/10.1021/acsami.4c04768
Department(s)
Civil, Architectural and Environmental Engineering
Keywords and Phrases
failure modes; finite element modeling; graphene-AgNW; in situ tensile test; laser-induced projectile impact test; molecular dynamics
International Standard Serial Number (ISSN)
1944-8252; 1944-8244
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 American Chemical Society, All rights reserved.
Publication Date
01 Jan 2024
Included in
Civil Engineering Commons, Engineering Mechanics Commons, Structural Engineering Commons
Comments
Army Research Office, Grant W911NF-21-1-0096