| About this Abstract |
| Meeting |
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Symposium
|
13th International Conference on the Technology of Plasticity (ICTP 2021)
|
| Presentation Title |
Combined Computed Tomography and Numerical Modeling for the Analysis of Bending of Additively Manufactured Cellular Sheets |
| Author(s) |
Stephan Rosenthal, Elliott Jost, Christopher Saldana, Till Clausmeyer, Marlon Hahn, A. Erman Tekkaya |
| On-Site Speaker (Planned) |
Stephan Rosenthal |
| Abstract Scope |
Additively manufactured (AM) metallic sheets with internal cellular structures are formed in a bending operation. This enables a higher degree of lightweighting potential due to design freedom and strain hardening. Computer tomography (CT) of those structures with wall thicknesses of 0.3 mm reveal manufacturing inaccuracies of the AM-process between the CAD and actual geometry of up to 30%. The CT-data shows that the geometric deviation of the unit cells is periodic. A surface model based on CT-data is used to evaluate volume-meshing strategies in a finite element model, benefiting from the periodicity of the core structure. With the CT-based numerical model, the accuracy in predicting force-displacement response can be increased, when compared to the ideal CAD-based model. It is demonstrated that accurate representation of the actual geometry in the numerical model is critical for a correct prediction of the bending behavior and the investigation of localization phenomena during deformation. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |