Role of weakest links and system-size scaling in multiscale modeling of stochastic plasticity

Journal article
(Original article)


Publication Details

Author(s): Ispanovity PD, Tuezes D, Szabo P, Zaiser M, Groma I
Journal: Physical Review B
Publisher: AMER PHYSICAL SOC
Publication year: 2017
Volume: 95
Journal issue: 5
ISSN: 2469-9950


Abstract

Plastic deformation of crystalline and amorphous matter often involves intermittent local strain burst events. To understand the physical background of the phenomenon a minimal stochastic mesoscopic model was introduced, where details of the microstructure evolution are statistically represented in terms of a fluctuating local yield threshold. In the present paper we propose a method for determining the corresponding yield stress distribution for the case of crystal plasticity from lower scale discrete dislocation dynamics simulations which we combine with weakest link arguments. The success of scale linking is demonstrated by comparing stress-strain curves obtained from the resulting mesoscopic and the underlying discrete dislocation models in the microplastic regime. As shown by various scaling relations they are statistically equivalent and behave identically in the thermodynamic limit. The proposed technique is expected to be applicable to different microstructures and also to amorphous materials.


FAU Authors / FAU Editors

Zaiser, Michael Prof. Dr.
Lehrstuhl für Werkstoffsimulation


External institutions with authors

Eötvös Loránd University / Eötvös Loránd Tudományegyetem (ELTE)


How to cite

APA:
Ispanovity, P.D., Tuezes, D., Szabo, P., Zaiser, M., & Groma, I. (2017). Role of weakest links and system-size scaling in multiscale modeling of stochastic plasticity. Physical Review B, 95(5). https://dx.doi.org/10.1103/PhysRevB.95.054108

MLA:
Ispanovity, Peter Dusan, et al. "Role of weakest links and system-size scaling in multiscale modeling of stochastic plasticity." Physical Review B 95.5 (2017).

BibTeX: 

Last updated on 2019-24-05 at 05:08