Optimization and plasticity in disordered media

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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date

2009

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Department of Applied Physics

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en

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Physical Review Letters, Volume 103, issue 22, pp. 1-4

Abstract

We study the plastic yielding of disordered media using the perfectly plastic random fuse model. The yield surfaces are shown to be different from those obtained minimizing the sum of the local yield thresholds, i.e., the so-called minimum “energy” surfaces. As a result, the global yield stress is lower than expected from naive optimization and the difference persists as the sample size increases. At variance with minimum energy surfaces, height-height fluctuations of yield surfaces exhibit multiscaling. We provide a theoretical argument that explains how this behavior arises from the very different nature of the optimization problem in both cases.

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Keywords

disordered systems, plasticity

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DOI

10.1103/PhysRevLett.103.225502

Citation

Picallo, C B, Lopez, J M, Zapperi, S & Alava, M 2009, 'Optimization and plasticity in disordered media', Physical Review Letters, vol. 103, no. 22, 225502, pp. 1-4. https://doi.org/10.1103/PhysRevLett.103.225502

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https://urn.fi/URN:NBN:fi:aalto-202510087596

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[article-cris] Perustieteiden korkeakoulu / SCI