Automatic processing of an orientation map into a finite element mesh that conforms to grain boundaries. (8th June 2016)

• Record Type: Journal Article
• Authors: Dancette, S; Browet, A; Martin, G; Willemet, M; Delannay, L
• Is Part Of: Modelling and simulation in materials science and engineering. Volume 24:Number 5(2016)
• Publication Date: 2016-06-08
• Subjects: image-based mesh -- microstructure modeling -- graph segmentation -- crystal plasticity -- EBSD; Materials -- Mathematical models -- Periodicals; Matériaux -- Modèles mathématiques -- Périodiques; Materials -- Mathematical models; Periodicals; 620.00113
• DOI: 10.1088/0965-0393/24/5/055014
• Languages: English
• ISSNs: 0965-0393

Abstract

Abstract: A new procedure for microstructure-based finite element modeling of polycrystalline aggregates is presented. The proposed method relies (i) on an efficient graph-based community detection algorithm for crystallographic data segmentation and feature contour extraction and (ii) on the generation of selectively refined meshes conforming to grain boundaries. It constitutes a versatile and close to automatic environment for meshing complex microstructures. The procedure is illustrated with polycrystal microstructures characterized by orientation imaging microscopy. Hot deformation of a Duplex stainless steel is investigated based on ex-situ EBSD measurements performed on the same region of interest before and after deformation. A finite element mesh representing the initial microstructure is generated and then used in a crystal plasticity simulation of the plane strain compression. Simulation results and experiments are in relatively good agreement, confirming a large potential for such directly coupled experimental and modeling analyses, which is facilitated by the present image-based meshing procedure.