| About this Abstract |
| Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
|
| Symposium
|
Modeling
|
| Presentation Title |
A Novel Knowledge-based Toolpath Constructive Approach for Designing High-precision Graded Lattice Structures |
| Author(s) |
Zhiping Wang, Yicha Zhang, Alain Bernard |
| On-Site Speaker (Planned) |
Zhiping Wang |
| Abstract Scope |
Current part-scale lattice design methods cause accuracy loss and manufacturability uncertainty in AM preparation stages. STL model conversion and slicing can lead to loss of shape accuracy and surface quality, while unqualified toolpaths may cause printing failures, e.g. pores or re-melting in powder-bed fusion process. Moreover, all these steps are time-consuming due to large size of model file. To solve these challenges, this paper proposes a novel toolpath-based constructive design method to generate high-precision graded lattice unit cells with manufacturability. It integrates implicit modeling, direct slicing, gradient bidirectional-offsetting and fine toolpath configuration to construct qualified toolpaths without any intermediate steps. To save computation time in part-scale lattice design, predefined different types or sizes of graded lattice unit cells are populated and assembled into a given design space directly. Hence, it has big potential to improve industrial application of part-scale porous structures with fine and gradient porous features. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |