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Predicting plastic flow events in athermal shear-strained amorphous solids.

Smarajit Karmakar1, Anael Lemaître, Edan Lerner

  • 1Department of Chemical Physics, The Weizmann Institute of Science, Rehovot 76100, Israel.

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|September 28, 2010
PubMed
Summary
This summary is machine-generated.

We developed a method to predict plastic failure in amorphous solids using nonlinear elastic moduli. This finding links reversible elastic properties to irreversible plastic deformation, simplifying failure prediction.

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Area of Science:

  • Materials Science
  • Solid Mechanics
  • Physics of Amorphous Materials

Background:

  • Amorphous solids exhibit complex mechanical behaviors.
  • Predicting plastic failure in these materials is crucial for engineering applications.
  • Traditionally, elastic and plastic properties are considered distinct.

Purpose of the Study:

  • To propose a novel method for predicting the critical strain at which amorphous solids undergo plastic failure.
  • To demonstrate that nonlinear elastic moduli can be sufficient for this prediction.
  • To bridge the conceptual gap between reversible elastic response and irreversible plastic deformation.

Main Methods:

  • Measurement of nonlinear elastic moduli in generic amorphous solids.
  • Analysis correlating nonlinear elastic properties with the onset of plastic response.
  • Development of a predictive model based solely on elastic measurements.

Main Results:

  • Successfully predicted the external strain value for plastic failure.
  • Established a direct link between nonlinear elastic moduli and the initiation of irreversible deformation.
  • Demonstrated the sufficiency of elastic measurements for failure prediction.

Conclusions:

  • Nonlinear elastic moduli contain predictive information about plastic failure in amorphous solids.
  • This method offers a simplified approach to assess material failure.
  • The findings challenge the traditional separation of elastic and plastic behaviors.