| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials Aging and Compatibility: Experimental and Computational Approaches to Enable Lifetime Predictions
|
| Presentation Title |
Accelerated Aging and Lifetime Performance Predictions of Silicone Cushions Under Compression |
| Author(s) |
Karly Knox, Hannah Eshelman, Nancy Merino, Maira Ceron, Patrick Campbell |
| On-Site Speaker (Planned) |
Karly Knox |
| Abstract Scope |
Additively manufactured (AM) silicone foams are customizable and durable materials for cushion applications. Understanding mechanical aging of AM silicones is vital for ensuring safety over their lifetime in use. We aged AM silicones (specifically PDMS-co-PDPS) under compression at various temperatures and measured their compression set and load retention to develop time temperature superposition (TTS) curves used to estimate material performance over its lifetime. For thicker samples (>5 mm), the aging isotherms generated a clear TTS master curve. However, for thin samples (<1 mm), we observed scatter in the data, which prevented accurate lifetime predictions. New insights allowed us to develop an improved methodology for aging and measuring these materials’ mechanical properties and reducing error, resulting in more accurate results and an improved TTS curve.
This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. IM # LLNL-ABS-866710 |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Polymers, Mechanical Properties |