| About this Abstract |
| Meeting |
2019 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Fatigue and Fracture III
|
| Presentation Title |
Finite Element Failure Analysis of Lattice Structures |
| Author(s) |
Behzad B. Babamiri, Andrew Minor, Hesam Askari, Kavan Hazeli |
| On-Site Speaker (Planned) |
Behzad B. Babamiri |
| Abstract Scope |
Lattice structures offer high strength and stiffness/mass ratio features which provide freedom in design that is beyond the solid materials capacity, however they have natural tendency to develop localized failures due to large number of thin struts. Accordingly, collapse of few struts has a great impact on the global strength and stability. Therefore, the objective of this study is to find out that where and how damage initiates and propagates through the lattice structures (struts) using FEM. Herein, the ductile criterion, a phenomenological model to predict the damage initiation, is implemented to obtain onset of damage in addictively manufactured lattice structures made of Nickel based super alloys subjected to quasi-static loading. To avoid strain localization, using Hillerborg's fracture energy model, the damage evolution after damage initiation is characterized by a stress-displacement response rather than a stress-strain response. The results are validated by full-field strain maps from digital image correlation techniques. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |