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Creation of freestanding wrinkled nano-films with desired deformation properties by controlling the surface morphology of a sacrificial layer
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10.1063/1.4807579
/content/aip/journal/jap/113/20/10.1063/1.4807579
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/20/10.1063/1.4807579

Figures

Image of FIG. 1.
FIG. 1.

Formation of wrinkled structure by buckling.

Image of FIG. 2.
FIG. 2.

Fabrication concept of freestanding wrinkled film.

Image of FIG. 3.
FIG. 3.

Apparatus for applying strain to silicone rubber sheet; applied strains in the and directions can be controlled separately.

Image of FIG. 4.
FIG. 4.

Freestanding nano-film specimen for tensile experiment (unit: mm).

Image of FIG. 5.
FIG. 5.

Wrinkled structure by uniaxial strain (stripe structure).

Image of FIG. 6.
FIG. 6.

Wrinkled structure by equi-biaxial strain (labyrinth structure).

Image of FIG. 7.
FIG. 7.

Wrinkled structures by biaxial strain.

Image of FIG. 8.
FIG. 8.

Stress-strain curves obtained from tensile experiments for freestanding wrinkled films (stripe structure).

Image of FIG. 9.
FIG. 9.

Cyclic loading experiment for freestanding wrinkled film (U4, stripe structure).

Image of FIG. 10.
FIG. 10.

Stress-strain curves obtained from tensile experiments for freestanding wrinkled film (labyrinth structure); Ex: loading in -direction, Ey: loading in -direction in Fig. 6(a) .

Image of FIG. 11.
FIG. 11.

Stress-strain curves obtained from tensile experiments for freestanding wrinkled films (nonsymmetrical buckling structure); Bx: loading in -direction, By: loading in -direction in Fig. 7(d) .

Image of FIG. 12.
FIG. 12.

Summary of stress-strain curves of Cu nano-films with various wrinkled structures.

Image of FIG. 13.
FIG. 13.

FEM models.

Image of FIG. 14.
FIG. 14.

Comparison of stress-strain curves of FEM analyses and experiments.

Image of FIG. 15.
FIG. 15.

Mises stress distributions at fracture strain.

Image of FIG. 16.
FIG. 16.

Parametric study of stress-strain curves of wrinkled films by FEM.

Tables

Generic image for table
Table I.

Conditions of wrinkle formation; : thickness of sacrificial resin layer, : applied strain in -direction, : applied strain in -direction, : curing time before applying , : curing time before applying , : wavelength of wrinkled structure, : amplitude of wrinkled structure.

Generic image for table
Table II.

Loading direction of tensile experiments.

Generic image for table
Table III.

Critical Mises stress , maximum principal stress and strain at fracture.

Generic image for table
Table IV.

Size of winkle structures in parametric study; : film thickness, : wavelength of rib, : amplitude of rib.

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/content/aip/journal/jap/113/20/10.1063/1.4807579
2013-05-23
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Creation of freestanding wrinkled nano-films with desired deformation properties by controlling the surface morphology of a sacrificial layer
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/20/10.1063/1.4807579
10.1063/1.4807579
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