Noise spectra in the reversible-irreversible transition in amorphous solids under oscillatory driving

Abstract

We study the stress fluctuations in simulations of a two-dimensional amorphous solid under a cyclic drive. It is known that this system organizes into a reversible state for small driving amplitudes and remains in an irreversible state for high driving amplitudes, and that a critical driving amplitude separates the two regimes. Here we study the time series of the stress fluctuations below and above the reversible-irreversible transition. In the irreversible regime above the transition, the power spectrum of the stress fluctuations is broad and has a $1/f^{\alpha }$ shape with $1<\alpha <2$. We find that the low frequency noise power peaks near the stress at which dc yielding occurs, which is consistent with the behavior expected in systems undergoing a non-equilibrium phase transition.

arXiv comment9 pages, 8 figures

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Cited by in corpus (2)

• Embedding Orthogonal Memories in a Colloidal Gel through Oscillatory Shear
• Spatiotemporal analysis of nonaffine displacements in disordered solids sheared across the yielding point