A deformation mechanism based material model for topology optimization of laminated composite plates and shells. (1st January 2017)

• Record Type: Journal Article
• Authors: Luo, Quantian; Tong, Liyong
• Is Part Of: Composite structures. Volume 159(2017)
• Page Start: 246
• Page End: 256
• Publication Date: 2017-01-01
• Subjects: Material model -- Plate and shell -- Large deflection -- Optimization; Composite construction -- Periodicals; Composites -- Périodiques; 624.18
• DOI: 10.1016/j.compstruct.2016.09.056
• Languages: English
• ISSNs: 0263-8223

Abstract

Abstract: This paper presents a novel deformation mechanism based material model for topology optimization of laminated plates and shells considering large displacements. Discussed firstly are the one-node hinges in optimum designs of plate and shell structures and the numerical issues caused by void elements in geometrical nonlinear analysis. To circumvent these two problems, we propose a new material model in which different penalties are applied to different strain energy terms related to extensional, shear, bending and extensional-bending coupling deformation mechanisms and void elements are removed in nonlinear finite element analysis. An efficient algorithm is developed by using the present material model and the moving iso-surface threshold method. Numerical results are presented for isotropic and composite plates and shells and compared with those available in the literature to validate the present material model.