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Dynamic compression of soft layered materials yields tunable and spatiotemporally evolving surface patterns
Brianna MacNider1, Xudong Liang1, Samantha Hoang2
1Department of Mechanical and Aerospace Engineering, University of California San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA.
Physical Review. E
|April 19, 2023
Summary
Dynamic wrinkling in soft layered systems occurs faster than previously thought. Impact velocity significantly influences wrinkle patterns, offering new possibilities for material fabrication and soft electronic applications.
Area of Science:
- Materials Science
- Mechanics of Materials
- Surface Physics
Background:
- Soft layered systems are widely studied for pattern formation under quasistatic loading.
- Understanding dynamic buckling is crucial for advanced material applications.
Purpose of the Study:
- To investigate the dynamic formation of wrinkles in a stiff-film-on-viscoelastic-substrate system.
- To analyze the influence of impact velocity on wrinkle characteristics and film damage.
Main Methods:
- Experimental observation of dynamic wrinkling.
- Computational simulations incorporating inertial and viscoelastic effects.
- Analysis of film damage and its impact on buckling.
Main Results:
- Observed spatiotemporally varying wrinkle wavelengths dependent on impact velocity.
- Dynamic wrinkling wavelengths exceeded those seen in quasistatic loading.
- Film damage was found to modulate dynamic buckling behavior.
Conclusions:
- Inertial and viscoelastic effects are critical in dynamic wrinkling.
- Dynamic buckling offers novel routes for nanofabrication.
- Findings are applicable to soft elastoelectronics and optics.
