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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Computational Design and Simulation of Materials (CDSM 2018): Computational Design of Materials
Presentation Title Ultralight Metallic/Composite Materials with Architected Cellular Structures
Author(s) Maryam Tabatabaei, Satya N. Atluri
On-Site Speaker (Planned) Maryam Tabatabaei
Abstract Scope We present the simplest initial computational framework for the analysis, design, and topology optimization of ultralight metallic/composite materials with architected cellular structures. The repetitive Representative Volume Element (RVE) approach is employed to model the cellular micro-lattices. Each member of the cellular structure is modeled using only one finite beam element with 12 degrees of freedom, and the nonlinear coupling of axial, bidirectional-bending, and torsional deformations is studied for each 3D spatial beam element. The large deformation analysis of the strut members is performed utilizing mixed variational principle in the updated Lagrangian co-rotational reference frame. The explicit form of the stiffness matrix is derived under the effect of plasticity for the micro-architected cellular metals and under the effect of nonlinear flexible connections for the cuboct cellular composites. The plastic hinge mechanism is employed to consider the plasticity effect. Then, we use newly proposed homotopy methods to solve the algebraic equations.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

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