| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
An Investigation of Plastic Deformation of Periodic Cellular Structures Based on Analytical Modeling |
| Author(s) |
Naresh Koju, Li Yang |
| On-Site Speaker (Planned) |
Naresh Koju |
| Abstract Scope |
When coupled with complex boundary conditions, the mechanical characteristics of additively manufactured (AM) cellular structures deviate significantly from classic models, largely due to the local stress heterogeneity. This is particularly significant for properties driven by local behaviors, such as fracture and plasticity. Previously, full-scale analytical model of AM cellular structures based on elastic materials was established. However, with most structural applications non-brittle materials with plasticity are employed. Preliminary studies have shown that presence of plasticity further complicates their behaviors. To establish better understanding of plastic deformation behaviors under boundary-induced stress heterogeneity, this research employed stiffness matrix-based modeling and plastic hinge theory to investigate the compound material-geometry-plasticity relationships. Proposed models exhibited higher predictability on bending-dominated structures, while also suggested the need of further modeling development for stretching-dominated structures. Detailed experimental and modeling studies are carried out to evaluate the effect of non-elastic material behavior on mechanical performance and potential failure characteristics. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |