Constitutive models which describe crystal microplasticity in a continuum framework can be envisaged as average representations of the dynamics of dislocation systems. Thus, their performance needs to be assessed not only by their ability to correctly represent stress-strain characteristics on the specimen scale but also by their ability to correctly represent the evolution of internal stress and strain patterns. In the present comparative study we consider the bending of a free-standing thin film. We compare the results of 3D DDD simulations with those obtained from a simple 1D gradient plasticity model and a more complex dislocation-based continuum model. Both models correctly reproduce the nontrivial strain patterns predicted by DDD for the microbending problem.
|Translated title of the contribution||Modelling Thin Film Microbending: A Comparative Study of Three Different Approaches|
|Title of host publication||9th International Conference of Numerical Analysis and Applied Mathematics|
|Pages||1526 - 1529|
|Number of pages||4|
|Publication status||Published - 2011|
Bibliographical noteName and Venue of Event: Halkidiki, Greece
Conference Proceedings/Title of Journal: AIP Conference Proceedings