| 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 |
Piezoresistivity Analysis of Polymer Composite Piezoresistors and Validation via Monte Carlo Simulations |
| Author(s) |
Melike Nur Onder, Mehmet Ali Gülgün, Melih Papila |
| On-Site Speaker (Planned) |
Melike Nur Onder |
| Abstract Scope |
Polymer matrix carbonaceous-based composites are analyzed to observe the qualitative piezoresistive response of PMC piezoresistors. We focused on fluctuations in the gauge factor of piezoresistive composites and how it depends on the strain amplitude. A three-dimensional Monte Carlo percolation model was developed. The model investigates the change in piezoresistivity and its relation with the deformation-induced geometric changes. The present model of the composite piezoresistor simulates the percolation path for conduction by tunneling and capacitive interaction of particle pairs. the model's variables are strain cycles with different amplitudes (loading parameter) and Poisson's ratio (material parameter). During loading/unloading, the algorithm simulates the cross-sectional shrinkage/extension of the matrix given the Poisson's ratio. Shrinkage of the matrix increases the conductance, while elongation decreases it under applied strain. Simulations showed that the dominance of shrinkage impact on the piezoresistivity varies with respect to the strain amplitude. The experimental results also indicated the same outcome as the simulations. Simulations confirm the dominant influence of variations in strain/shrinkage amplitude as the main reason for the fluctuation of the gauge factor. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |