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Jang, Ji-Hyun
Nano Crystal Lab (NCL)
Research Interests
  • Graphene, photoelectrochemical (PEC) H2 generation, ORR/OER, SERS,3D-Nanostructures, supercapacitors, thermoelectric materials

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Instabilities and pattern transformation in periodic, porous elastoplastic solid coatings

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Title
Instabilities and pattern transformation in periodic, porous elastoplastic solid coatings
Author
Singamaneni, SrikanthBertoldi, KatiaChang, SehoonJang, Ji-HyunThomas, Edwin L.Boyce, Mary C.Tsukruk, Vladimir V.
Keywords
buckling behavior; interference lithography structures; mechanical instabilities; pattern transformation
Issue Date
2009-01
Publisher
AMER CHEMICAL SOC
Citation
ACS APPLIED MATERIALS & INTERFACES, v.1, no.1, pp.42 - 47
Abstract
Pattern transformation in periodic microporous elastoplastic solid coatings is caused by a buckling of the struts and a rotation of the nodes under compressive stresses. The results of a nonlinear numerical investigation confirm the critical role of the bifurcation of the periodic solid under compressive stresses. In striking contrast to the earlier observations of elastic instabilities in porous elastomeric solids, the elastic-plastic nature of the cross-linked periodic microstructure studied here provides the ability to lock in the transformed pattern with complete relaxation of the internal stresses. The study unveils a novel deformation mode in porous periodic solids in the form of organized buckling instability of weak strut elements.
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DOI
10.1021/am800078f
ISSN
1944-8244
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ECHE_Journal Papers
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