95 citations · 359 across the 10 of their papers we have counts for
10 papers
Dislocation Avalanches: Earthquakes on the Micron Scale
Péter Dusán Ispánovity, Dávid Ugi, Gábor Péterffy +7
Compression experiments on micron-scale specimens and acoustic emission (AE) measurements on bulk samples revealed that the dislocation motion resembles a stick-slip process - a se…
Efficient numerical method to handle boundary conditions in 2D elastic media
Denes Berta, Istvan Groma, Peter Dusan Ispanovity
A numerical method is developed to efficiently calculate the stress (and displacement) field in finite 2D rectangular media. The solution is expanded on a function basis with eleme…
Disorder is good for you: The influence of local disorder on strain localization and ductility of strain softening materials
Dániel Tüzes, Michael Zaiser, Péter Dusán Ispánovity
We formulate a generic concept model for the deformation of a locally disordered, macroscopically homogeneous material which undergoes irreversible strain softening during plastic…
Micron-scale deformation: a coupled in-situ study of strain bursts and acoustic emission
Ádám István Hegyi, Péter Dusán Ispánovity, Michal Knapek +6
Plastic deformation of micron-scale crystalline materials differ considerably from bulk ones, because it is characterized by random strain bursts. To obtain a detailed picture abou…
Dislocation patterning in a 2D continuum theory of dislocations
Istvan Groma, Michael Zaiser, Peter Dusan Ispanovity
Understanding the spontaneous emergence of dislocation patterns during plastic deformation is a long standing challenge in dislocation theory. During the past decades several pheno…
Plastic strain is a mixture of avalanches and quasi-reversible deformations: Study of various sizes
Peter Szabo, Peter Dusan Ispanovity, Istvan Groma
Size-dependence of plastic flow is studied by discrete dislocation dynamical simulation of systems with various numbers of interacting linear edge dislocations while the stress is…
Scale-free phase field theory of dislocations
Istvan Groma, Zoltan Vandrus, Peter Dusan Ispanovity
According to recent experimental and numerical investigations if the characteristic size of a specimen is in the submicron size regime several new interesting phenomena emerge duri…
Avalanches in 2D Dislocation Systems: Plastic Yielding is not Depinning
Péter Dusán Ispánovity, Lasse Laurson, Michael Zaiser +3
We study the properties of strain bursts (dislocation avalanches) occurring in two-dimensional discrete dislocation dynamics models under quasistatic stress-controlled loading. Con…
Criticality of relaxation in dislocation systems
Péter Dusán Ispánovity, István Groma, Géza Györgyi +2
Relaxation processes of dislocation systems are studied by two-dimensional dynamical simulations. In order to capture generic features, three physically different scenarios were st…
Submicron plasticity: yield stress, dislocation avalanches, and velocity distribution
Péter Dusán Ispánovity, István Groma, Géza Györgyi +2
The existence of a well defined yield stress, where a macroscopic piece of crystal begins to plastically flow, has been one of the basic observations of materials science. In contr…