IFMA - Institut Français de Mécanique Avancée (Clermont Université, Institut Français de Mécanique Avancée (IFMA) / Laboratoire de Mécanique et Ingénieries (LaMI), BP 10448 - F-63000 Clermont Ferrand - France)
Abstract : The spatial variability of stress fields resulting from polycrystalline aggregate calculations involving random grain geometry and crystal orientations is investigated. A periodogram-based method is proposed to identify the properties of homogeneous Gaussian random fields (power spectral density and related covariance structure). Based on a set of finite element polycrystalline aggregate calculations the properties of the maximal principal stress field are identified. Two cases are considered, using either a fixed or random grain geometry. The stability of the method w.r.t the number of samples and the load level (up to 3.5 \% macroscopic deformation) is investigated.
https://hal-enpc.archives-ouvertes.fr/hal-00660409 Contributeur : Bruno SudretConnectez-vous pour contacter le contributeur Soumis le : lundi 16 janvier 2012 - 16:29:08 Dernière modification le : samedi 15 janvier 2022 - 03:50:46 Archivage à long terme le : : mardi 17 avril 2012 - 02:36:20
Bruno Sudret, Hung Xuan Dang, Marc Berveiller, Asmahana Zeghadi. Statistical inference of 2D random stress fields obtained from polycrystalline aggregate calculations. International Journal of Fracture, Springer Verlag, 2012, pp.1-30. ⟨hal-00660409⟩