| 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 |
Stress-Based Analysis Using an Extended Variational Approach for Composite Laminates with Alternating Material Properties In the Loading Direction |
| Author(s) |
M. J. Mohammad Fikry, Vladimir Vinogradov, K.T. Tan, Shinji Ogihara |
| On-Site Speaker (Planned) |
M. J. Mohammad Fikry |
| Abstract Scope |
Ply termination, commonly employed to modify laminate thickness or fiber orientation, adapt to variations in structural geometry, or introduce a hybrid composite through ply material alteration, frequently results in ply discontinuities within composite structures. The termination of an internal ply generates a resin-rich zone at the terminated edge, causing stress concentrations and initiating damage. A variational analysis approach was utilized in this study to determine the stress state in a laminate featuring alternating material properties in the loading direction. The analysis was extended based on the original variational model by Hashin and Vinogradov, which initially concentrated on the matrix cracking problem. In the analysis, an admissible stress field that satisfies equilibrium and all appropriate boundary and continuity conditions was first constructed in each region and then used in conjunction with the principle of minimum complementary energy to achieve the optimal stress state. To verify the analysis's applicability, unidirectional and angle-ply carbon fiber reinforced plastic (CFRP) laminates with ply discontinuities under load were examined. Stress distributions and altered mechanical properties were then compared with finite element analysis (FEM) results. The findings from the proposed analysis demonstrated a good correlation with the FEM outcomes. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |