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Related Experiment Videos

Flexible polymers and thin rods far from equilibrium: buckling dynamics

Golubovic1, Moldovan, Peredera

  • 1Department of Physics, West Virginia University, Morgantown, West Virginia 26506, USA.

Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
|October 25, 2000
PubMed
Summary

Flexible chains exhibit Euler buckling instability in viscous media, showing a time-self-similar coarsening process. Their wavelike patterns grow in amplitude and wavelength, linked to phase ordering phenomena.

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Area of Science:

  • Physics
  • Materials Science
  • Polymer Science

Background:

  • The classical Euler buckling instability describes the sudden deformation of slender structures under compression.
  • Understanding this phenomenon is crucial for flexible molecular chains and thin rods in dynamic environments.

Purpose of the Study:

  • To investigate the dynamics of Euler buckling instability in flexible molecular chains and thin rods within a viscous medium.
  • To characterize the time-dependent behavior and underlying mechanisms of this instability.

Main Methods:

  • Analysis of the classical Euler buckling instability.
  • Observation of flexible chains and thin rods in a viscous medium.
  • Relating buckling dynamics to phase ordering phenomena using chain slope as an order parameter.

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Main Results:

  • Flexible chains exhibit a time-self-similar coarsening process during buckling.
  • A wavelike pattern emerges, with both amplitude and wavelength increasing over time.
  • The buckling dynamics are demonstrably linked to phase ordering phenomena.

Conclusions:

  • The study reveals a novel coarsening dynamic for Euler buckling in flexible chains.
  • Chain slope acts as an effective order parameter in this phase ordering context.
  • Findings offer insights into the mechanical behavior of soft matter under compression.