Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2011-03-25
Physical Review E 84 (2011) 016115
Physics
Condensed Matter
Soft Condensed Matter
Scientific paper
10.1103/PhysRevE.84.016115
We discuss avalanche and finite size fluctuations in a mesoscopic model to describe the shear plasticity of amorphous materials. Plastic deformation is assumed to occur through series of local reorganizations. Yield stress criteria are random while each plastic slip event induces a quadrupolar long range elastic stress redistribution. The model is discretized on a regular square lattice. Shear plasticity can be studied in this context as a depinning dynamic phase transition. We show evidence for a scale free distribution of avalanches $P(s)\propto S^{-\kappa}$ with a non trivial exponent $\kappa \approx 1.25$ significantly different from the mean field result $\kappa = 1.5$. Finite size effects allow for a characterization of the scaling invariance of the yield stress fluctuations observed in small samples. We finally identify a population of precursors of plastic activity and characterize its spatial distribution.
Petäjä Viljo
Roux Stephane
Talamali Mehdi
Vandembroucq Damien
No associations
LandOfFree
Avalanches, precursors and finite size fluctuations in a mesoscopic model of amorphous plasticity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Avalanches, precursors and finite size fluctuations in a mesoscopic model of amorphous plasticity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Avalanches, precursors and finite size fluctuations in a mesoscopic model of amorphous plasticity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-571347