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 an Intralaminar and Interlaminar Fiber-Aligned Finite Element Technique for Analyzing High-Energy Impact Damage on Composite Panel. |
Author(s) |
Alessandro Polla, Giacomo Frulla, Enrico Cestino, Raj Das, Pier Marzocca |
On-Site Speaker (Planned) |
Alessandro Polla |
Abstract Scope |
Composite materials exhibit exceptional mechanical properties and lightweight characteristics. However, their susceptibility to impact damage poses a significant challenge for the design of secure and lightweight aerospace structures. This current study investigates the response of a thermoset CFRP composite panel when subjected to high-energy ballistic impacts. Validation data is sourced from a joint experimental effort by NASA and the FAA, focusing on impact performance of a 16-ply quasi-isotropic composite panel impacted by a hollow 50g Al-2024 projectile at different velocities. A novel physical-based stacked shell-cohesive modeling approach is introduced to analyze the progressive damage failure of impacted composite panels. This approach combines a cohesive intralaminar matrix region with a structured shell mesh aligned with the principal fiber direction of each composite ply. Furthermore, interlaminar cohesive mesh layers spanning through the thickness of the panel are aligned with adjacent fiber directions to enhance sensitivity to delamination initiation and propagation as observed experimentally. The proposed numerical technique is developed based on ANSYS LS-DYNA numerical solver. A structured comparison is presented to investigate the applicability of current available intralaminar composite continuum damage models MAT58, MAT261 & MAT262. Simulation outcomes, including dynamic response of the panel under impact and the resulting damage morphology, are compared with literature experimental results to gauge the predictive capability of the developed numerical modelling technique. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |