| 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 of Interlaminar Fracture Toughness of Out of Plane Wrinkled Prepreg Woven CFRP Laminates |
| Author(s) |
Md Admay Amif, Arief Yudhanto, David Jack |
| On-Site Speaker (Planned) |
Md Admay Amif |
| Abstract Scope |
Understanding the significance of waviness and wrinkles in Carbon Fiber Reinforced Polymer (CFRP) is crucial for optimized design and enhanced material properties. We evaluate the influence of out-of-plane wrinkles or waviness in the interior of woven CFRP laminates on Mode I interlaminar fracture toughness. First, we manufacture woven CFRP laminate with carefully controlled out-of-plane wrinkles of various amplitudes, replicating the geometrical nature of wrinkles observed in thick composite structures. We then characterize the waviness amplitude of pre-tested and post-tested double cantilever beam (DCB) specimens using an in-house ultrasonic scan and microscopic profilometer, respectively. DCB tests were performed to evaluate the effect of waviness on crack propagation and corresponding energy release rate or interlaminar fracture toughness (GIC). The phenomenon of crack growth and GIC</SUB with respect to displacement were investigated and compared between non-wrinkled and wrinkled with various amplitudes. We found that CFRP laminates with wrinkles or waviness exhibit higher GIC as the speed of crack propagation can be reduced. This research reveals that internal wrinkles, which are seen as manufacturing-induced defects, can be exploited to explain the relationship between the complexity of the crack propagation dynamics and the apparent fracture resistance of composite laminates. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |