| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Probabilistic Life Prediction of Materials in Aging Systems
|
| Presentation Title |
Mechanistic and Engineering-Scale Modeling of the Effect of High-altitude Environments on the Structural Integrity of Airframe Components |
| Author(s) |
James Burns |
| On-Site Speaker (Planned) |
James Burns |
| Abstract Scope |
Aerospace components operate at high altitude (low temperatures and water vapor pressures); such environments retard fatigue crack growth. Incorporating these benefits into structural life management requires an understanding of the governing damage physics, data generation protocols that ensure similitude, and integration of environmental effects into fracture mechanics-based life prediction software. This talk will outline relevant knowledge gaps and present the results of research efforts aimed at addressing these issues. Specific emphasis will be given to multi-disciplinary modeling being performed to better understand the important role of molecular transport from the bulk to the crack tip in these environments. Also, results from a novel LEFM-based software (AFGROW) module that was developed to integrate a coupled load-environment spectrum into fatigue life prediction methodologies. The talk will conclude with a discussion of the incremental and long-term needs to enable incorporation of these approaches into structural life management of airframe components. |