| About this Abstract |
| Meeting |
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
| Symposium
|
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
| Presentation Title |
Evaluation on Fatigue Degradation and Residual Strength of Composite Pressure Vessel |
| Author(s) |
Ryoma Aoki, Tomohiro Yokozeki, Tetsuya Matsuda, Masahito Ueda, Wataru Iwase |
| On-Site Speaker (Planned) |
Ryoma Aoki |
| Abstract Scope |
Type IV high-pressure hydrogen tanks, composed of plastic liners and carbon fiber reinforced composites, are expected to significantly improve hydrogen storage capacity. In the composite pressure vessels, cracks and delamination can occur internally within the normal pressure range. These damages occurring under repeated loading reduce structural stiffness and may lead to a decrease in strength compared to the initial condition, even without complete tank failure. An analytical method capable of evaluating the fatigue damage progression characteristics of CFRP and subsequent residual strength properties, as well as elucidating the damage and failure mechanisms of high-pressure tanks, is required. Therefore, in this study, the fatigue simulation was conducted to predict the residual strength after fatigue in composite pressure vessel. We introduced a continuum damage mechanics model for intra-laminar damage and a cohesive zone model for delamination in composite laminates under fatigue loading. These damage models were combined with finite element analysis. Additionally, a finite element analysis model simulating a filament-wound tank structure was created. Fatigue simulation was applied to the 2D tank model to evaluate the residual stiffness of the composite tank after fatigue. In the residual strength prediction, fatigue simulation was conducted up to a predetermined target fatigue cycle. The residual strength after fatigue was predicted by conducting the static damage simulation until tank burst with the output fatigue damage variable as input. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |