| 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 |
Multiscale Modeling for Predicting Mechanical Properties of Open Hole Laminates in 3D-Printed Carbon-Fiber-Reinforced Thermoplastics |
| Author(s) |
Yamato Hoshikawa, Keiichi Shirasu, Yoshiaki Kawagoe, Kazuki Ryuzono, Ryo Higuchi, Tomonaga Okabe |
| On-Site Speaker (Planned) |
Yamato Hoshikawa |
| Abstract Scope |
Additive manufacturing (AM) has significantly progressed in recent years, leading to adoption across various industries. Furthermore, a method for 3D (or three-dimensional) printing carbon-fiber-reinforced plastic (3DP-CFRP) has been developed. The filaments are reinforced with continuous carbon fiber to greatly enhance their mechanical properties in this method. However, material defects such as voids and filament waviness resulting from AM can have a substantial negative impact on mechanical properties in 3DP-CFRP. This study proposes a key strategy to predict the mechanical properties of 3DP-CFRP, considering the effect of material defects. The strategy consists of micro, meso, and macroscales. Microscale and mesoscale analyses employ homogenization theory to predict the material properties of unidirectional laminates. At the microscale, a periodic unit cell (PUC) analysis of the fibers and resin is used to predict the mechanical properties of the filaments. Subsequently, a mesoscale model consisting of filaments and material defects is analyzed by PUC analysis and the Budiansky-Fleck model to evaluate mechanical properties. Finally, the predicted unidirectional mechanical properties are applied to a macro-scale analysis of the mechanical behavior of laminates with an open hole. Intra- and inter-laminar damage are modeled by the cohesive zone model and expressed using the extended finite element method and interface element, respectively. In addition, longitudinal damage is modeled using a smeared crack model to predict the ultimate strength. The analytical results were compared with experimental results from previous studies, which validated the effectiveness of the proposed strategy in capturing the mechanical properties. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |