English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the zaia usage as premium feature

ZAIA

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the access of premium content as premium feature

Premium Content

Zendy Tools

Zendy Open

Dislocation dynamics simulation is used to investigate the effect of grainsize and grain shape on the flow stress in model copper grains. We considergrains of 1.25-10 $\mu$m size, three orientations (<135>, <100> and <111>) andthree shapes (cube, plate and needles). Two types of periodic aggregates withone or four grains are simulated to investigate different dislocation flux atgrain boundaries. It is shown that in all cases the flow stress varies linearlywith the inverse of the square root of the grain size, with a proportionalityfactor varying strongly with the grain orientation and shape. Simulationresults are discussed in the light of other simulation results and experimentalobservations. Finally, a simple model is proposed to account for the grainshape influence on the grain size effect.

Effects of the grain size and shape on the flow stress: A dislocation dynamics study