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Elastin is Responsible for Tissue Elasticity01:12

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Elastic fiber contains the protein elastin along with lesser amounts of other proteins and glycoproteins. The main property of elastin is that it will return to its original shape after being stretched or compressed. Elastic fibers are prominent in elastic tissues found in skin and the elastic ligaments of the vertebral column.
Ligaments and tendons are made of dense regular connective tissue, but in ligaments not all fibers are parallel. Dense regular elastic tissue contains elastin fibers and...
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Design and Fabrication of an Elastomeric Unit for Soft Modular Robots in Minimally Invasive Surgery
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Elastomeric tubes with self-regulated distension.

Nathan Jen1, Guilherme M Bessa2, Kaelyn Nicolson1

  • 1Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB, Canada.

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Summary
This summary is machine-generated.

Fabric-jacketed elastomer tubes offer passive regulation of distension and prevent asymmetric rupture. This design enhances soft robotic actuators and medical devices by improving structural integrity under pressure.

Keywords:
Materials mechanicsPolymersRobotics

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Area of Science:

  • Materials Science
  • Robotics
  • Biomedical Engineering

Background:

  • Compliant elastomer tubing is crucial for soft robotic actuators, including biomedical exomuscles and massage therapy devices.
  • Standard elastomer tubes are prone to asymmetric rupture and uncontrolled distension due to fabrication imperfections.

Purpose of the Study:

  • To investigate the effectiveness of a fabric jacket in regulating the distension of elastomer tubes.
  • To explore the potential of jacketed tubes in preventing asymmetric rupture and enhancing soft robotic applications.

Main Methods:

  • Fabrication of elastomer tubes with a custom fabric jacket.
  • Hydraulic pressure testing using a custom-built rig.
  • Development of a three-dimensional finite element model for quantitative prediction of tube distension.

Main Results:

  • Jacketed tubes exhibit self-regulating behavior, suppressing distension via strain-stiffening of the jacket.
  • The fabric jacket significantly prevents asymmetric distension and rupture, common issues in standard elastomer tubes.
  • Finite element modeling accurately predicted tube behavior across experimental and extended pressure ranges.

Conclusions:

  • A fabric jacket is an effective strategy for passive distension regulation and rupture prevention in elastomer tubes.
  • This design enhances the reliability and safety of soft robotic actuators and related applications.
  • Integration of kirigami patterns in jackets offers further potential for advanced elastomeric tube functionalities.