| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Accurate Prediction
|
| Presentation Title |
Fatigue Criticality Assessment of Volumetric Defects in Notched Specimens: A Non-Destructive Approach |
| Author(s) |
Arun Poudel, Jonathan W. Pegues, Matthew Kelly, Shuai Shao, Nima Shamsaei |
| On-Site Speaker (Planned) |
Jonathan W. Pegues |
| Abstract Scope |
The advancement of additive manufacturing (AM) for production of structural parts challenges conventional understanding of material performance in relation to geometrical features such as notches. As such, the synergistic effects of non-uniform stress fields, influenced by local geometrical factors, must be considered in relation to the stochastic distribution of defects. Here we propose a simplistic approach to assess fatigue criticality of volumetric defects in notched members through X-ray computed tomography. The Mode-I stress intensity factors (SIF) for defects within a specified volume are estimated based on position within a non-uniform stress field and ranked as a basis for criticality. This approach was validated for two materials, investigating both cylindrical and flat dog-bone fatigue specimens with varying notch geometries to predict the fatigue critical defects. Results demonstrate the efficacy of the approach with all crack-initiating defects falling within the top 0.7% of defects with the highest SIF of the respective specimen. |
| Proceedings Inclusion? |
Planned: |