Universality of periodicity as revealed from interlayer-mediated cracks

Collection with item attached
2017
Item details URL
http://open-repository.kisti.re.kr/cube/handle/open_repository/486738.do
DOI
10.1038/srep43400
Title
Universality of periodicity as revealed from interlayer-mediated cracks
Description
This work was supported by the National Research Foundation of Korea(NRF) via grants funded by the Korean government (MSIP) (2015-055714,2006-0093853). S.U.C. acknowledges support from the Basic ScienceResearch Program through the NRF, funded by the MSIP(NRF-2015R1C1A1A02037070). Y.D.K. and J.H. were supported by grants fromthe ONR (N00014-13-1-0602 and N00014-13-1-0464) and DE-SC0012592. J.H.J.,J. I. acknowledge support from the Pohang University of Science andTechnology and the Korea Institute of Science and TechnologyInformation. M.R.C. acknowledges support from the Dong-Joon SohnFoundation Scholarship.
abstract
A crack and its propagation is a challenging multiscale materials phenomenon of broad interest, from nanoscience to exogeology. Particularly in fracture mechanics, periodicities are of high scientific interest. However, a full understanding of this phenomenon across various physical scales is lacking. Here, we demonstrate periodic interlayer-mediated thin film crack propagation and discuss the governing conditions resulting in their periodicity as being universal. We show strong confinement of thin film cracks and arbitrary steering of their propagation by inserting a predefined thin interlayer, composed of either a polymer, metal, or even atomically thin graphene, between the substrate and the brittle thin film. The thin interlayer-mediated controllability arises from local modification of the effective mechanical properties of the crack medium. Numerical calculations incorporating basic fracture mechanics principles well model our experimental results. We believe that previous studies of periodic cracks in SiN films, self-de-bonding sol-gel films, and even drying colloidal films, along with this study, share the same physical origins but with differing physical boundary conditions. This finding provides a simple analogy for various periodic crack systems that exist in nature, not only for thin film cracks but also for cracks ranging in scale.
provenance
Made available in Cube on 2018-09-28T16:15:37Z (GMT). No. of bitstreams: 0
language
English
author
Cho, Myung Rae
Jung, Jong Hyun
Seo, Min Key
Cho, Sung Un
Kim, Young Duck
Lee, Jae Hyun
Kim, Yong Seung
Kim, Pilkwang
Hone, James
Ihm, Jisoon
Park, Yun Daniel
orcid
Kim, Young Duck/0000-0003-2593-9826; Jung, Jong Hyun/0000-0002-2409-975X
accessioned
2018-09-28T16:15:37Z
available
2018-09-28T16:15:37Z
issued
2017
citation
SCIENTIFIC REPORTS(7)
issn
2045-2322
uri
http://open-repository.kisti.re.kr/cube/handle/open_repository/486738.do
Funder
교육부
Funding Program
BK21플러스사업(0.5)
Project ID
1345273973
Jurisdiction
Rep.of Korea
Project Name
Frontier Physics Research Division
rights
openAccess
type
article


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