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Related Experiment Video

Updated: Jan 21, 2026

Perfusion and Inflation of the Mouse Lung for Tumor Histology
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Programming curvilinear paths of flat inflatables.

Emmanuel Siéfert1, Etienne Reyssat2, José Bico2

  • 1Laboratoire de Physique et Mécanique des Milieux Hétérogènes, CNRS UMR7636, Ecole Supérieure de Physique et Chimie Industrielles de Paris (ESPCI), Paris Sciences et Lettres Research University, Sorbonne Université, Université de Paris, 75005 Paris, France emmanuel.siefert@espci.fr.

Proceedings of the National Academy of Sciences of the United States of America
|August 9, 2019
PubMed
Summary
This summary is machine-generated.

Researchers programmed the shape of inflatable structures by controlling internal pressure. This method allows for precise shape control of deployable structures, with applications in medicine and aerospace.

Keywords:
programmable structurestension field theorywrinkling instability

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Applied Physics

Background:

  • Inflatable structures offer lightweight, deployable solutions for various fields.
  • Programming the precise deployed shape of thin, sealed sheets remains a challenge.
  • Internal pressure typically maximizes volume, not specific shapes.

Purpose of the Study:

  • To investigate the shape and nonlinear mechanics of inflated sealed sheets.
  • To develop a method for programming specific 2D shapes using internal pressure.
  • To demonstrate the potential applications of controlled inflatable structures.

Main Methods:

  • Analysis of stress states in inflated thin sheets.
  • Development of a minimal model for predicting curvature and wrinkling.
  • Creation of a numerical tool to solve the inverse problem of shape programming.
  • Experimental validation with inflated rings and curvilinear paths.

Main Results:

  • Rationalized the stress state and counterintuitive increase in curvature during inflation.
  • Observed wrinkle patterns in compressed regions, consistent with the minimal model.
  • Successfully developed a tool to program 2D curves via pressure input.
  • Demonstrated object manipulation along a target path using controlled inflation.

Conclusions:

  • Internal pressure can be used to precisely program the deployed shapes of inflatable structures.
  • The developed model accurately predicts mechanical behavior, including wrinkling.
  • This approach has significant potential for applications in robotics, aerospace, and medicine.