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 |
Computational Modeling of Low-Velocity Impact Damage and Moisture Interaction in Polymer Composites |
Author(s) |
Anil Mohan, Oluwatimilehin Oluwajire, Landon Grace |
On-Site Speaker (Planned) |
Anil Mohan |
Abstract Scope |
Polymer-matrix composites have become essential in several industries due to their lightweight and improved performance over traditional materials. However, there is a considerable risk to the long-term integrity of these structures due to their susceptibility to sub-surface damage, especially via low-velocity impact (LVI). In addition, composites inherently absorb moisture from the environment, gradually reducing structural integrity during slow diffusion processes.
This study introduces a computational model founded on Fick’s diffusion theory. Custom codes were utilized for simulating the impact of low-velocity damage and subsequent moisture absorption in polymer composites. ABAQUS and COMSOL Multiphysics were employed to model low-velocity impact events and moisture diffusion, respectively.
This work simulates moisture diffusion in samples subjected to a singular low-velocity impact. We developed a 3D model of a polymer composite subjected to 0J, 1J, 2J, and 3J impacts, mimicking experimental conditions with a drop tower and 9mm radius striker tip. Moisture diffusion is incorporated using mathematical models capturing diffusion kinetics. The computational model's accuracy is validated against experimental data gathered via Near Infrared Spectroscopy. Data was collected at regular moisture intervals, enabling experimental capture of moisture progression. Results offer a comprehensive framework for studying the combined effects of impact damage and moisture on polymer composites. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |