| 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 |
Effect of Bi-Axial Tensile Loading on the Helium Gas Leakage Behavior of Thin-Ply CFRP Laminates |
| Author(s) |
Daigo Sato, Kazuyoshi Fujishiro, Hisashi Kumazawa, Toshio Ogasawara |
| On-Site Speaker (Planned) |
Daigo Sato |
| Abstract Scope |
This study investigated helium gas leakage behavior through thickness direction of thin-ply CFRP laminates under biaxial tensile loading at room temperature (RT). The thin-ply layers are adopted to the center of cross-ply laminate. The prepreg thickness was 0.06 mm, and the thin-ply layer is expected to provide a gas barrier effect. The effect of the stacking sequence on the gas leakage behavior was investigated for [0°4/90°4/0°4/90°4/45°/-45°]s and [0°4/90°4/0°4/90°4/45°/0°/-45°]s laminates. Prior to gas leakage testing, biaxial tensile strain of approximately 1% was applied to a cruciform specimen at RT or at cryogenic temperature (20 K) to generate matrix cracks in each ply. The cruciform specimen with matrix-cracks was subjected to uniaxial or bi-axial tensile loading up to 0.5 % strain at RT, and gas leakage was measured using a Helium gas leak detector. The results showed that the amount of gas leakage increased with increasing tensile strain. The gas leakage rate was more significant under biaxial tensile loading than under uniaxial tensile loading. In addition, the gas leakage under uniaxial loading significantly depended on the loading direction. It was also shown that the amount of gas leakage may be independent of the stacking sequence of the thin-ply specimen. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |