Effective elastic properties of periodic irregular open-cell foams. (15th June 2018)

• Record Type: Journal Article
• Authors: Zhu, Wenqi; Blal, Nawfal; Cunsolo, Salvatore; Baillis, Dominique
• Is Part Of: International journal of solids and structures. Volume 143(2018)
• Page Start: 155
• Page End: 166
• Publication Date: 2018-06-15
• Subjects: Irregular open-cell foams -- Tomography -- Periodic computational homogenization -- Mechanical properties -- Representative volume element; Mechanics, Applied -- Periodicals; Structural analysis (Engineering) -- Periodicals; Elastic solids -- Periodicals; Mécanique appliquée -- Périodiques; Constructions, Théorie des -- Périodiques; Solides élastiques -- Périodiques; Elastic solids; Mechanics, Applied; Structural analysis (Engineering); Periodicals; 624.18
• DOI: 10.1016/j.ijsolstr.2018.03.003
• Languages: English
• ISSNs: 0020-7683

Abstract

Abstract: This paper presents a micromechanical modeling for predicting the effective linear elastic properties of irregular open-cell foams using the periodic computational homogenization method. The tomography images are analyzed to obtain the morphological description of the irregular open-cell structure. An approach based on Voronoi diagram is used to generate realistic periodic foam structures with the morphological parameters. Hill's lemma computational homogenization approach is performed to predict the effective elastic properties. In this paper, we focus especially on the determination of the Representative Volume Element (RVE) and the importance of choosing the RVE parameters, i.e. the number of realizations and the volume of RVE, on the accuracy of models. The efficiencies of different approaches are discussed. Some recommendations and improvements are proposed.