A comparison of predictions from micropolar and strain gradient crystal plasticity theories for textured oligocrystals

Date

2023-05-30

Author

Tandoğan, İzzet Tarık
Bulut, Orhun
Budnitzki, Michael
Yalçınkaya, Tuncay
Sandfeld, Stefan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

24
views

0
downloads

Cite This

Novel additive manufacturing techniques often result in strongly textured microstructures with anisotropic grain structures. In the example of cold spraying, the grains are flattened in build direction due to severe plastic deformation. Simulations employing plasticity models based on the Cauchy continuum do not fully account for the effect of microstructure on the mechanical response. Strain gradient and micropolar crystal plasticity models possess intrinsiclength scales and are sensitive to the effects of this strong texture, but are based on quite different underlying assumptions.In this work, the performance of these nonlocal models is tested in predicting the mechanical response of such microstructures. In order to accomplish this, we calibrated the material parameters of both types of models on simple loading cases through finite element simulations and compared their performance and predictions on a set of selected oligocrystals. The advantages and disadvantages of these models for this particular application are discussedaccordingly.

URI

https://hdl.handle.net/11511/107429

Collections

Department of Aerospace Engineering, Conference / Seminar