Akademik Veri Yönetim Sistemi
93rd Annual Meeting of the International Association of Applied Mathematics and Mechanics, GAMM 2023, Dresden, Almanya, 30 Mayıs - 02 Haziran 2023, ss.227
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 intrinsic
length 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 discussed
accordingly.