| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
Lattice Support Design for Preventing Solid-support Cracking During Laser Powder Bed Fusion Process |
| Author(s) |
Hai Tran, Albert To |
| On-Site Speaker (Planned) |
Albert To |
| Abstract Scope |
Cracking resulted from residual stress at the interface between solid component and lattice style support structure frequently occurs in laser powder bed fusion additive manufacturing, and thus it is critical to predict possible cracking and design the support to prevent it. This study employs a combination of computational methods and experiments to predict cracking at the interface and determine the relationship between the critical J-integral and the contact area of the solid-support interface. In particular, the finite element method-based global-local approach is used to perform the modified inherent strain analysis with homogenized material for the entire part (global), which is followed by the fracture mechanics-based J-integral analysis at conjectured vulnerable locations (local). Both numerical and experimental validations are conducted to show the accuracy and efficiency of the proposed approach. Some design examples are illustrated to show how the proposed approach is applied to prevent interfacial cracking. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |