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Studying Large Amplitude Oscillatory Shear Response of Soft Materials
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Studying Large Amplitude Oscillatory Shear Response of Soft Materials

Published on: April 25, 2019

Fiber bundle model with stick-slip dynamics.

Zoltán Halász1, Ferenc Kun

  • 1Department of Theoretical Physics, University of Debrecen, P.O. Box 5, H-4010 Debrecen, Hungary.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|October 2, 2009
PubMed
Summary
This summary is machine-generated.

This study models systems with stick-slip events, revealing emergent plastic behavior and permanent deformation under load. Disorder in failure thresholds affects the plastic response, with annealed cases showing a more pronounced plastic regime.

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Area of Science:

  • Materials Science
  • Mechanical Engineering
  • Physics

Background:

  • Many natural and engineered systems exhibit complex mechanical responses under external loads.
  • Stick-slip phenomena are common in friction and material failure, leading to unpredictable behavior.

Purpose of the Study:

  • To develop a generic model for systems exhibiting stick-slip events.
  • To analyze the macroscopic mechanical response and failure mechanisms.
  • To investigate the influence of disorder on system behavior.

Main Methods:

  • Modeling the system as a bundle of fibers with load-activated stick-slip mechanisms.
  • Deriving the constitutive equation for the system.
  • Employing analytical calculations to determine macroscopic behavior.
  • Investigating quenched and annealed disorder in failure thresholds.

Main Results:

  • Emergence of macroscopic plastic response followed by hardening or softening regimes.
  • Occurrence of irreversible permanent deformation upon load release, dependent on sliding event properties.
  • Qualitative similarity in behavior for quenched and annealed disorder.
  • More pronounced plastic regime observed in the annealed disorder case.

Conclusions:

  • The proposed generic model accurately describes the mechanical response and failure of systems with stick-slip events.
  • The model predicts emergent macroscopic plasticity and permanent deformation.
  • Disorder in failure thresholds significantly influences the plastic regime, with annealed disorder leading to more pronounced effects.