About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Fatigue Behavior of TPMS Metamaterials: Role of Geometry and Surface Texture Under Complex Loading |
| Author(s) |
Reza Molaei, Krista Dyer, Mohammad Amjadi, Shuai Shao, Nima Shamsaei |
| On-Site Speaker (Planned) |
Reza Molaei |
| Abstract Scope |
Triply Periodic Minimal Surface (TPMS) structures are unique types of lattices defined by period mathematical equations which can only be fabricated through the layer-by-layer process of additive manufacturing. These structures offer several advantages including a high surface area to volume ratio and reduced stress concentrations, making them attractive for applications in the biomedical, automative and aerospace industries. This study explores the fatigue behavior of TPMS lattice structures under tension, compression, torsion, and axial-torsion loads. Ti-6Al-4V specimens of 50% and 70% porosity with diamond and gyroid unit cells were tested. X-ray computed tomography (XCT) was used to evaluate geometric accuracy by comparing scans to the original CAD models. Finite element analysis of both CAD and XCT-based geometries enabled assessment of local stress distributions and the influence of fabrication process-induced surface texture. Additionally, several fatigue life estimation models were employed to correlate the behavior of lattice specimens with that of solid specimens. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Modeling and Simulation |