About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing Modeling, Simulation, and Machine Learning: Microstructure, Mechanics, and Process
|
| Presentation Title |
Application of Ductile Fracture Modeling to Complex, Additively Manufactured SS316L Structure |
| Author(s) |
Erik T. Furton, Allison M. Beese |
| On-Site Speaker (Planned) |
Erik T. Furton |
| Abstract Scope |
To ensure reliability of additively manufactured components in structural applications, an understanding of the combined behavior of pores and stress state on failure behavior is required. Stainless steel 316L brackets with a three-dimensional truss-based geometry, in which stress state and pore size varied among struts, were fabricated with laser powder bed fusion. Fracture models considering both stress state and pore size, formulated in terms of stress (pore-size dependent Mohr-Coulomb, or P-MC) and strain (pore-size dependent Modified Mohr-Coulomb, or P-MMC), were calibrated and used to predict the fracture behavior of the brackets. The P-MC fracture model was appropriate for predicting the maximum load-bearing capacity for all samples in this study, while the P-MMC fracture model was shown to be only applicable for samples containing small pores. Both fracture models identified a defect-tolerant regime, in which pores smaller than 20% of the cross-sectional area had limited effect on the fracture behavior. |