| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture IV: Toward Confident Use in Critical Applications
|
| Presentation Title |
Surface Morphology, Stress Concentrations, Micromechanical Modeling and Fatigue Life in 3D Printed Metals |
| Author(s) |
Anthony D. Rollett, Christopher Kantzos |
| On-Site Speaker (Planned) |
Anthony D. Rollett |
| Abstract Scope |
The effects of surface morphology on stress concentrations and thus fatigue are discussed with respect to 3D printed metals. Both experimentally measured samples and synthetic structures generated via a fractal approach are analyzed to determine correlations with stress hot spots. Convolutional neural nets (CNNs) are applied to make the connection as robust as possible and also learn which features are critical through the use of viewports. CNNs are also useful for sorting fatigue fracture surfaces and creating a computed fractography is ongoing. Simulation of elasto-viscoplastic mechanical response using a spectral code is efficient for working with 3D image data and provides quantitative data for the studies. 3D printing offers a wide range of parameter space where, e.g., varying the contouring results in measurable variations in fatigue life. Deciphering the relative importance of variations in porosity content versus surface roughness variations is ongoing. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |