| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
|
| Presentation Title |
Experimental and Numerical Investigation into Mechanical Degradation of Polymers and Polymer Composites |
| Author(s) |
Vinamra Agrawal, Asha-Dee Celestine, Brandon Runnels |
| On-Site Speaker (Planned) |
Vinamra Agrawal |
| Abstract Scope |
The process of mechanical degradation of polymers subject to water and heat diffusion is studied using experimental methods and continuum damage modeling. As the water and heat diffuses within the composite, strength and moduli of the composite degrade due to breaking down of polymer chains brought upon by underlying chemical reactions. Samples were created using injection molding and 3D printing, soaked in water at different temperatures and subject to tension and flexure tests.
Model parameters, such as glass transition temperature, strength and modulus, were calibrated from experimental studies. The damage model depends on the water concentration, temperature, time history and the stress states at every point. The damage model was implemented using a computational scheme that solves conservation and evolution laws using a multilevel, multi-grid adaptive mesh refinement scheme. The model is tested by calculating effective moduli by recreating ASTM test conditions numerically and validating against experimental observations. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |