A Dynamic Inflation Test for Soft Materials

S. A. Bentil, K. T. Ramesh, T. D. Nguyen

Research output: Contribution to journalArticlepeer-review

Abstract

We developed a dynamic inflation experiment to measure the elastodynamic behavior of soft materials. In the experiments, a shock tube was used to apply dynamic pressurization to thin polydimethylsiloxane specimens. Two high-speed cameras were used to image the deforming specimen and three-dimensional digital image correlation was used to determine the three-dimensional displacement field of the specimen surface. We applied dynamic Kirchhoff plate bending theory and concepts from structural dynamics to derive a mathematical expression for the dynamic Young’s modulus. The phase velocity of the initial transverse wave propagation response and the vibration frequency of the long-time response were captured during our experiments and were applied in the calculation of the dynamic Young’s modulus.

Original languageEnglish (US)
Pages (from-to)759-769
Number of pages11
JournalExperimental Mechanics
Volume56
Issue number5
DOIs
StatePublished - Jun 1 2016

Keywords

  • Dynamic test
  • Inflation test
  • Polydimethylsiloxane
  • Shock tube
  • Sylgard 184
  • Thin plate bending

ASJC Scopus subject areas

  • Aerospace Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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