Delamination of stiff islands on stretchable substrates
Download
1 / 12

Delamination of stiff islands on stretchable substrates - PowerPoint PPT Presentation


  • 64 Views
  • Uploaded on

Delamination of stiff islands on stretchable substrates. Zhigang Suo Harvard University. Lu, Yoon, Suo Int. J. Mater. Res. 98, 717 (2007). The future of knowledge?. Information. Display. Hermetic coating. Polymer substrate. Mechanical Challenges. Island crack. Coating crack.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Delamination of stiff islands on stretchable substrates' - serina-murphy


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Delamination of stiff islands on stretchable substrates

Delamination of stiff islands on stretchable substrates

Zhigang Suo

Harvard University

Lu, Yoon, Suo

Int. J. Mater. Res. 98, 717 (2007)


The future of knowledge?

Information

Display


Flexible electronics

Hermetic coating

Polymer substrate

Mechanical

Challenges

Island

crack

Coating

crack

Metal fatigue

Island

debond

Flexible electronics


Island debond
Island debond

No debond at 25% strain

Debond at 5.6% strain

Bhattacharya, Salomon & Wagner, 2006

Lacour, Wagner, Narayan, Li, Suo, 2006




Steady state

G

Gss

a

Steady state

h

Suo and Hutchinson, IJF (1990)


Converging debond

Ligament length 2c

He, Evans & Hutchinson, 1996



G max o vershoots g ss
Gmaxovershoots Gss

Overshooting

Gss


Critical island size

With the same interface toughness and the same applied strain, more compliant substrate allows larger critical island size


Summary
Summary

  • Islands debond when exceeding critical size.

  • Gmax overshoots Gss.

  • Critical island size is large when the substrate is compliant.

Lu, Yoon, Suo, Int. J. Mater. Res. 98, 717 (2007)


ad