About this Abstract |
Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Symposium
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2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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Presentation Title |
Investigation of the Effective Anisotropy for the Triply Periodic Minimal Surface Lattice Under Varying Applied Stress Orientation |
Author(s) |
Chongyi Wei, Douglas E. Smith |
On-Site Speaker (Planned) |
Chongyi Wei |
Abstract Scope |
The advance of additive manufacturing makes it possible to design spatially varying lattice structures with complex geometric configurations. The effective elastic properties of these periodic lattice structures are known to deviate significantly from the isotropic behavior where orthotropic material symmetry is often assumed. This paper addresses the need for a robust homogenization method for evaluating the anisotropy of periodic lattice structures including an understanding of how the elastic properties transform under rotation. Here, periodic boundary conditions are applied on two-material RVE finite element models to evaluate the complete homogenized stiffness tensor. A constrained multi-output regression approach is proposed to evaluate the elasticity tensor components under any assumed material symmetry model. This approach is applied to various lattice structures including scaffold and surface-based TPMS and Strut-based lattices. Our approach is used to assess the accuracy of rotation for assumed anisotropic and orthotropic homogenized material models over a range of lattice structures. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |