Among the many potential two-dimensional carbon allotropes inspired by graphene, graphynes have received exceptional attention recently. Graphynes exhibit remarkable mechanical properties depending on their structure. The similar structure and two-dimensional nature of these materials yield many properties that are similar to those of graphene, but the presence of heterogeneous bond types is expected to lead to distinct properties. The main subject of this work is graphdiyne, one of the few graphynes that has been fabricated in large quantities. In this paper, we perform fracture analysis on graphdiyne and find a delocalized failure mechanism in which a crack propagates along a diagonal with respect its original direction. The covalence of the material allows for this simple but intriguing phenomenon to be investigated. Graphene is also tested to compare the behavior. This mechanism has implications for the toughness and robustness of this material, which is topical for many device applications recently proposed in the literature. Further, connections of such delocalized failure mechanisms are made to that of hidden length and sacrificial bonding in some biological systems such as proteins, bone, and nacre.
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July 2013
Research-Article
Failure of Graphdiyne: Structurally Directed Delocalized Crack Propagation
Dieter B. Brommer,
Dieter B. Brommer
Laboratory for Atomistic and Molecular Mechanics (LAMM)
,Department of Civil and Environmental Engineering
,Massachusetts Institute of Technology
,77 Massachusetts Avenue
,Room 1-235 A&B
,Cambridge, MA 02139
;Department of Mechanical Engineering
,Massachusetts Institute of Technology
,77 Massachusetts Avenue
,Cambridge, MA 02139
Search for other works by this author on:
Markus J. Buehler
e-mail: mbuehler@MIT.EDU
Markus J. Buehler
1
Laboratory for Atomistic and Molecular Mechanics (LAMM)
,Department of Civil and Environmental Engineering
,Massachusetts Institute of Technology
,77 Massachusetts Avenue
,Room 1-235 A&B
,Cambridge, MA 02139
;Center for Computational Engineering
,Massachusetts Institute of Technology
,77 Massachusetts Avenue
,Cambridge, MA 02139
; andDepartment of Civil Engineering
,Massachusetts Institute of Technology
,77 Massachusetts Avenue
,Cambridge, MA 02139
e-mail: mbuehler@MIT.EDU
1Corresponding author.
Search for other works by this author on:
Dieter B. Brommer
Laboratory for Atomistic and Molecular Mechanics (LAMM)
,Department of Civil and Environmental Engineering
,Massachusetts Institute of Technology
,77 Massachusetts Avenue
,Room 1-235 A&B
,Cambridge, MA 02139
;Department of Mechanical Engineering
,Massachusetts Institute of Technology
,77 Massachusetts Avenue
,Cambridge, MA 02139
Markus J. Buehler
Laboratory for Atomistic and Molecular Mechanics (LAMM)
,Department of Civil and Environmental Engineering
,Massachusetts Institute of Technology
,77 Massachusetts Avenue
,Room 1-235 A&B
,Cambridge, MA 02139
;Center for Computational Engineering
,Massachusetts Institute of Technology
,77 Massachusetts Avenue
,Cambridge, MA 02139
; andDepartment of Civil Engineering
,Massachusetts Institute of Technology
,77 Massachusetts Avenue
,Cambridge, MA 02139
e-mail: mbuehler@MIT.EDU
1Corresponding author.
Manuscript received January 17, 2013; final manuscript received March 27, 2013; accepted manuscript posted May 31, 2013; published online May 31, 2013. Editor: Yonggang Huang.
J. Appl. Mech. Jul 2013, 80(4): 040908 (6 pages)
Published Online: May 31, 2013
Article history
Received:
January 17, 2013
Revision Received:
March 27, 2013
Accepted:
April 10, 2013
Citation
Brommer, D. B., and Buehler, M. J. (May 31, 2013). "Failure of Graphdiyne: Structurally Directed Delocalized Crack Propagation." ASME. J. Appl. Mech. July 2013; 80(4): 040908. https://doi.org/10.1115/1.4024176
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