About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Response of Materials Investigated Through Novel In-Situ Experiments and Modeling
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Presentation Title |
A Predictive Capability for Mechanical Behavior of Additively Manufactured Lattice Structures |
Author(s) |
John S. Carpenter, Donald W Brown, Vimal Chaitanya, Borys Drach, Zachary Paesani, Nathan Johnson, Jenny Wang, Maria Strantza |
On-Site Speaker (Planned) |
Nathan Johnson |
Abstract Scope |
Additive manufacturing (AM) has allowed for the fabrication of complex lattice structures that are viewed favorably for their mass/stiffness ratio. Their complex nature also makes them challenging to fabricate, inspect, and model with many lattices failing to meet mechanistic expectations. In this talk, 1-ID at the Advanced Photon Source was used to measure local strain in struts within an AM Ti-5Al-5V-5Mo-3Cr lattice under compressive loading to strut failure. It was found that, despite the use of post-process heat treatments, some amount of retained residual stress was present and was associated with the fabrication sequence. Simulated residual strains, validated through experiments, were then coupled with computed tomography to provide inputs to an FEA – based model architecture. It was observed that incorporating residual strain with model geometry allowed for an accurate prediction of local elastic strain distribution and location of failure during compressive loading. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Modeling and Simulation, Additive Manufacturing |