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Crackling versus continuumlike dynamics in brittle failure
1CEA, IRAMIS, SPCSI, Group Complex Systems and Fracture, F-91191 Gif sur Yvette, France.
Physical Review Letters
|August 20, 2013
Summary
We found that crack dynamics in heterogeneous materials transition between standard fracture mechanics and crackling dynamics, controlled by loading and material properties. This transition is key for observing crackling in fracture experiments.
Area of Science:
- Solid Mechanics
- Materials Science
- Complex Systems
Background:
- Crack propagation in heterogeneous materials is complex.
- Understanding the factors influencing crack dynamics is crucial for material science and engineering.
Purpose of the Study:
- To investigate how loading rate, specimen geometry, and microstructural texture influence crack dynamics.
- To identify the transition between continuum fracture mechanics and crackling dynamics.
- To establish scaling laws for crackling dynamics.
Main Methods:
- Analysis in the quasistatic approximation.
- Identification of two dimensionless variables controlling the transition.
- Formulation of scaling laws on the power spectrum of crack velocity.
Main Results:
- A transition exists between continuum fracture mechanics and crackling dynamics.
- This transition is controlled by two dimensionless variables.
- Scaling laws define conditions for observing crackling in fracture.
Conclusions:
- The study defines experimental conditions for observing crackling in fracture.
- Findings extend to other phenomena like wetting and domain wall dynamics in amorphous ferromagnets.
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