| 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 |
Investigating the Significance of the R-Curve in Interlaminar Crack Growth of Composites Subjected to Fatigue Loading |
| Author(s) |
Zane Forbes, Xiaobo Yu, Garth Pearce, Mathew W Joosten |
| On-Site Speaker (Planned) |
Zane Forbes |
| Abstract Scope |
This research develops an analytical model to examine the impact of the R-curve on interlaminar crack propagation in composite materials under fatigue loading conditions. The R-curve describes the change in a materials critical interlaminar fracture toughness as a crack advances. In fiber reinforced composites a steady state or plateau is typically reached, and this is associat-ed with saturated fiber bridging in mode I interlaminar fracture. The analyti-cal model is based on a family of parallel Paris curves that are a function of the critical fracture toughness. Experimental data of pure mode I unidirec-tional composite specimens, drawn from existing literature, indicates that the R-curve influences the crack propagation rate, particularly at higher cycle counts. The developed model is an effective tool for informing a materials behavior and may facilitate an understanding of the precision required for key material properties. The analytical model is intended to complement more complex Finite Element Analysis (FEA) simulations traditionally used for predicting lifespan and ensuring the durability of structures under cyclic loading. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |