Modeling the influence of stress triaxiality on the failure strain of nodular cast iron microstructures

Distance map based micromechanical analysis of the impact of matrix heterogeneities on the yield stress of nodular cast iron

“…The procedure introduced in section 2.2.1 to estimate the spatial distribution of the pearlite is a generalization of the previous approaches based on artificial microstructures (Collini et al, 2019;Rodriguez et al, 2018). Conversely, the technique described in section 2.2.2 to estimate the Si micro-segregation over a volume containing multiple nodules is one of a kind in the literature.…”

“…More recently, refined versions have been proposed where the unit cell is replaced by a representative volume element (RVE) containing a random isotropic distribution of spherical nodules (Collini et al, 2019;Rodriguez et al, 2018). A disadvantage of these models is that the generation of an artificial microstructure always requires the introduction of simplifying assumptions, e.g.…”

High‐resolution X‐ray tomographic workflow to investigate the stress distribution in vitreous enamel steels

“…For this study, a 3D RVE approach was adopted. An RVE is the smallest material volume element statistically representative of the overall microstructure, morphology and macroscopic constitutive response of the bulk material (Collini et al, 2019;Hill, 1963;Omairey et al, 2019). Such an approach can be adopted for this study because (i) the microstructure is periodic over the enamel deposition surface (x and z axes of the model, Fig.…”

“…An RVE is the smallest material volume element statistically representative of the overall microstructure, morphology and macroscopic constitutive response of the bulk material. [18][19][20] Such an approach can be adopted for this study because (i) the microstructure is periodic over the enamel deposition surface (x and z axes of the model, Figures 6BI, 6BII) and (ii) bubbles within the enamel are randomly distributed. The RVE dimensions must be as small as possible both to reduce the computational time and to better represent the geometrical features.…”

Characterization of Microstructural Damage and Failure Mechanisms in C45E Structural Steel under Compressive Load

“…This is a progressive, irreversible and complex (multi-scale, multi-mechanism) process, and therefore it is quite challenging to predict the behavior of materials during plastic deformation, as well as the damage level in a formed component [8]. The level of accumulated microstructural damage depends on several factors, of which the stress-strain state is the dominant factor [7,[9][10][11][12][13][14][15][16]. It should be noted that most polycrystalline metals exhibit substantial plastic deformation prior to fracture (ductility).…”