Modeling microbending of thin films through discrete dislocation dynamics, continuum dislocation theory, and gradient plasticity

2011 ◽  
Vol 27 (3) ◽  
pp. 612-618 ◽  
Author(s):  
Katerina E. Aifantis ◽  
Daniel Weygand ◽  
Christian Motz ◽  
Nikolaos Nikitas ◽  
Michael Zaiser
Keyword(s):  
Thin Films ◽  
Dislocation Dynamics ◽  
Dislocation Theory ◽  
Gradient Plasticity ◽  
Discrete Dislocation Dynamics ◽  
Discrete Dislocation ◽  
Image Position

Abstract

Non-quadratic defect energy: A comparison of gradient plasticity simulations to discrete dislocation dynamics results

PAMM ◽  
2016 ◽  
Vol 16 (1) ◽  
pp. 301-302
Author(s):  
Eric Bayerschen ◽  
Markus Stricker ◽  
Daniel Weygand ◽  
Thomas Böhlke
Keyword(s):  
Dislocation Dynamics ◽  
Gradient Plasticity ◽  
Defect Energy ◽  
Discrete Dislocation Dynamics ◽  
Discrete Dislocation

A Retrospective Account of Seminal Research by H. M. Zbib

2021 ◽  
pp. 1-5
Author(s):  
John Hirth
Keyword(s):  
Multiscale Modeling ◽  
Strain Gradient ◽  
Strain Gradient Plasticity ◽  
Dislocation Dynamics ◽  
Gradient Plasticity ◽  
Discrete Dislocation Dynamics ◽  
Discrete Dislocation ◽  
Retrospective Account

Abstract Throughout his career, Zbib was innovative, originating models in seminal papers that anticipated areas of subsequent increased interest. These include strain-gradient plasticity, discrete dislocation dynamics, multiscale modeling, Arrays of Somigliana ring dislocations, and nanoscale plasticity. We comment here on these aspects of his work. Many of the papers in this volume represent applications of these ideas.

Cyclic Bending Response of Single- and Polycrystalline Thin Films: Two Dimensional Discrete Dislocation Dynamics

2013 ◽  
Vol 275-277 ◽  
pp. 132-137 ◽  
Author(s):  
Hai Dong Fan ◽  
Qing Yuan Wang ◽  
Muhammad Kashif Khan
Keyword(s):  
Thin Films ◽  
Interaction Model ◽  
Cyclic Hardening ◽  
Dislocation Dynamics ◽  
Two Dimensional ◽  
Cyclic Bending ◽  
Discrete Dislocation Dynamics ◽  
Polycrystalline Thin Films ◽  
Discrete Dislocation ◽  
Bending Response

The bending behavior of single- and polycrystalline thin films is modeled by two-dimensional discrete dislocation dynamics (DDD) to study the cyclic bending response. In the polycrystalline films, grain boundaries (GBs) are simulated with a penetrable dislocation-GB interaction model. Our results reveal that the single- and polycrystalline thin films under pure bending exhibit strong Bauschinger effect but no cyclic hardening or softening. Furthermore, the uploading response of each cycle can be divided into three stages, which are associated with the glide, annihilation and nucleation of dislocations, respectively.

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