| 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 |
Characterization of Interfacial Strength Between Carbon Fiber and Matrix Resin in CFRP Laminates by Pulse Laser Spallation Method |
| Author(s) |
Masahiro Arai |
| On-Site Speaker (Planned) |
Masahiro Arai |
| Abstract Scope |
This study applies the pulse laser spallation method to the strength evaluation of CFRP and attempts to measure the bond strength at the interface between carbon fiber and matrix resin. Three-dimensional unsteady dynamic elasticity analysis based on the Laplace transformation method was employed to evaluate the wave propagation inside of the specimen. Ultrasonic waves are excited by irradiating the specimen with a pulse laser, and when the reflected waves propagate through the CFRP laminate, delamination between the carbon fiber and matrix resin occurs if the stress exceeds the strength limit on the interface. The macroscopic stress generated in the CFRP at that time was obtained by inverse analysis using the finite element method and transfer function method. The interfacial strength between the fiber and resin was calculated by representing the local stress field of the fiber and resin was evaluated by a micro model using homogenization analysis evaluating the micro stress generated in the heterogeneous structure. The fiber/resin interfacial strength was evaluated in the micro stress field where the interfacial vertical stress is dominant, considering the effects of variations in the fiber arrangement within the CFRP unit cell, the effect of the distance between fibers, and the effect of the molding residual stress. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |