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Characterization of random stress fields obtained from polycrystalline aggregate calculations using multi-scale stochastic finite elements
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.
Characterization of random stress fields obtained from polycrystalline aggregate calculations using multi-scale stochastic finite elements
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.
Characterization of random stress fields obtained from polycrystalline aggregate calculations using multi-scale stochastic finite elements
Sudret, Bruno (Autor:in) / Dang, Hung Xuan (Autor:in) / Berveiller, Marc (Autor:in) / Zeghadi, Asmahana (Autor:in) / Yalamas, Thierry (Autor:in)
Frontiers of Structural and Civil Engineering ; 9 ; 121-140
01.06.2015
20 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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