| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Additive Manufacturing Modeling and Simulation: AM Materials, Processes, and Mechanics
|
| Presentation Title |
Stress State Dependent Plasticity and Fracture Properties of Additively Manufactured Stainless Steel 316L |
| Author(s) |
Alexander E. Wilson-Heid, Allison M. Beese |
| On-Site Speaker (Planned) |
Alexander E. Wilson-Heid |
| Abstract Scope |
A stress state dependent plasticity and fracture description for laser powder bed fusion (L-PBF) additively manufactured 316L has been developed. Experimental tests under five dissimilar stress states were used to probe the elastoplastic behavior and fracture strain to failure was evaluated under six different stress states. Both plasticity and fracture behavior were characterized in two orientations with respect to the build direction. Using a combined experimental and computational modeling/simulation approach, an anisotropic plasticity model (Hill 1948 anisotropic yield criterion, associated flow rule, and an isotropic hardening law) and ductile fracture model (modified Mohr-Coulomb) were calibrated and validated. The L-PBF material was found to be more ductile for samples whose tensile axis was parallel to the vertical build direction for all stress states, while the strength of the material was found to be isotropic for pure shear and shear dominated stress states, and anisotropic only under tension dominated loading. |