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High aspect ratio wrinkles via substrate prestretch.

Yu-Cheng Chen1, Alfred J Crosby

  • 1University of Massachusetts Amherst, 120 Governors Drive, Amherst, MA, 01003, USA.

Advanced Materials (Deerfield Beach, Fla.)
|May 28, 2014
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Summary

Researchers created a non-fractured, high aspect ratio wrinkled surface by stabilizing the wrinkling mode at high strain. This breakthrough doubles the accessible wrinkling aspect ratio for advanced applications.

Keywords:
aspect ratioridge localizationsubstrate prestretchwrinkling

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Area of Science:

  • Materials Science
  • Surface Engineering
  • Mechanics of Materials

Background:

  • Surface wrinkling is a common phenomenon in thin films.
  • Understanding and controlling wrinkling is crucial for various applications.
  • Existing models often limit the achievable aspect ratio of wrinkles.

Purpose of the Study:

  • To fabricate a non-fractured, high aspect ratio wrinkled surface.
  • To stabilize the wrinkling mode at high strain.
  • To enhance the accessible wrinkling aspect ratio beyond current limitations.

Main Methods:

  • Utilized advanced models of the localization transition.
  • Applied knowledge of surface failure mechanisms.
  • Experimentally stabilized the wrinkling mode under high strain conditions.

Main Results:

  • Successfully fabricated a non-fractured wrinkled surface.
  • Achieved a high aspect ratio for the wrinkled surface.
  • Doubled the accessible wrinkling aspect ratio compared to previously reported values.

Conclusions:

  • The developed method enables the creation of high aspect ratio wrinkled surfaces.
  • Stabilizing wrinkling at high strain is key to achieving larger aspect ratios.
  • This high aspect ratio surface holds significant promise for future wrinkle-based applications.