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Deterministic control of adhesive crack propagation through jamming based switchable adhesives
Cole B Haverkamp1, Dohgyu Hwang2, Chanhong Lee1
1Department of Materials Science & Engineering, Iowa State University, Ames, IA 50011, USA.
Soft Matter
|January 25, 2021
Summary
Researchers developed a new adhesive technology using a granular jamming layer for precise control over crack initiation, propagation, and arresting. This programmable method enhances adhesion and allows for reversible debonding cycles.
Area of Science:
- Materials Science
- Adhesive Science
- Mechanics of Materials
Background:
- Controlling delamination is crucial for both permanent and reversible adhesives.
- Dynamic crack control is challenging due to disparate time scales of crack propagation and arrest mechanisms.
Purpose of the Study:
- To demonstrate deterministic control over crack initiation, propagation, and arresting in adhesive films.
- To introduce a novel method for programmable and reversible adhesive debonding.
Main Methods:
- Integration of a granular jamming layer into adhesive films.
- Utilizing changes in material rigidity and stiffness for crack manipulation.
- Applying diverse pressurization input signal profiles to control crack dynamics.
Main Results:
- Achieved deterministic control of crack initiation, propagation, and arresting.
- Demonstrated an 11x enhancement in adhesion through the jamming mechanism.
- Showcased high reversibility and programmability for multiple debonding cycles.
Conclusions:
- The granular jamming layer enables precise, programmable control over adhesive crack dynamics.
- This approach offers a significant advancement in adhesive science for both strong bonding and controlled release applications.
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