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Programmable shape transformation of elastic spherical domes.

Arif M Abdullah1, Paul V Braun2, K Jimmy Hsia3

  • 1Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA. kjhsia@cmu.edu.

Soft Matter
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PubMed
Summary
This summary is machine-generated.

We demonstrate programmable shape transformation in bilayer spherical domes using mismatch strain. Dome geometry and structure control morphing into cylinders, enabling adaptive structures responsive to stimuli.

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Computational Mechanics

Background:

  • Stimuli-responsive materials offer potential for adaptive structures.
  • Controlling shape transformation in elastic systems is crucial for advanced applications.

Purpose of the Study:

  • To investigate mismatch strain-driven shape transformation in bilayer spherical domes.
  • To analyze the influence of geometric and structural properties on dome morphing.
  • To establish design guidelines for programmable, adaptive structures.

Main Methods:

  • Finite element analysis (FEA) to simulate dome behavior under mismatch strain.
  • Experimental validation using polymer-based elastic bilayer domes in organic solvents.
  • Systematic variation of dome geometry and structural characteristics.

Main Results:

  • Spherical domes exhibit snap-through, bifurcation buckling, and gradual bending into cylinders with increasing mismatch strain.
  • Three distinct groups of dome geometries identified based on transformation behavior.
  • Experimental results qualitatively confirm FEA predictions.

Conclusions:

  • Bilayer spherical dome morphing can be programmed via geometry and structure, in addition to external stimuli.
  • Incorporating elastic instability mechanisms like snap-through enhances response time.
  • Design guidelines enable realization of deployable, reconfigurable, and adaptive structures.