Deformation patterns and surface morphology in a minimal model of amorphous plasticity

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Sandfeld S, Zaiser M
Zeitschrift: Journal of Statistical Mechanics-Theory and Experiment
Verlag: Institute of Physics: Hybrid Open Access
Jahr der Veröffentlichung: 2014
ISSN: 1742-5468


Abstract


We investigate a minimal model of the plastic deformation of amorphous materials. The material elements are assumed to exhibit ideally plastic behavior (J2 plasticity). Structural disorder is considered in terms of random variations of the local yield stresses. Using a finite element implementation of this simple model, we simulate the plane strain deformation of long thin rods loaded in tension. The resulting strain patterns are statistically characterized in terms of their spatial correlation functions. Studies of the corresponding surface morphology reveal a non-trivial Hurst exponent H approximate to 0.8, indicating the presence of long-range correlations in the deformation patterns. The simulated deformation patterns and surface morphology exhibit persistent features which emerge already at the very onset of plastic deformation, while subsequent evolution is characterized by growth in amplitude without major morphology changes. The findings are compared to experimental observations.



FAU-Autoren / FAU-Herausgeber

Sandfeld, Stefan Dr.
Lehrstuhl für Werkstoffsimulation
Zaiser, Michael Prof. Dr.
Lehrstuhl für Werkstoffsimulation


Zitierweisen

APA:
Sandfeld, S., & Zaiser, M. (2014). Deformation patterns and surface morphology in a minimal model of amorphous plasticity. Journal of Statistical Mechanics-Theory and Experiment. https://dx.doi.org/10.1088/1742-5468/2014/03/P03014

MLA:
Sandfeld, Stefan, and Michael Zaiser. "Deformation patterns and surface morphology in a minimal model of amorphous plasticity." Journal of Statistical Mechanics-Theory and Experiment (2014).

BibTeX: 

Zuletzt aktualisiert 2018-10-08 um 06:55