| 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 |
Analysis of Stress Concentration Effects in High Strain Composite Column Bending Tests Fixtures |
| Author(s) |
Miguel Mireles, Armanj D. Hasanyan |
| On-Site Speaker (Planned) |
Miguel Mireles |
| Abstract Scope |
High strain composite (HSC) materials are exceptionally resilient, making them ideal for use in applications such as morphing and deployable space structures that undergo large configuration changes. However, the widespread use of HSCs faces obstacles due to the limited testing capabilities of their bending stiffness and strength properties in the large curvature regime. Recent studies have emphasized the importance of the column bending test (CBT) fixtures as a method for applying near-uniform curvature loads in the geometrically nonlinear regime for the moment versus curvature response. However, the clamping of the HSC test samples to the fixtures are shown to introduce highly localized stress concentrations that can significantly impact the test measurements. To tackle this issue, this study introduces a finite element approach to numerically model the CBT setup, facilitating the analysis of stress concentration during the bending process. The model incorporates rigid compression-bending fixtures, allowing for the simulation of the test conditions. The model provides insights into through-thickness stress distribution within the sample, both near and away from the clamped regions. The virtual testing of the CBT offers a comprehensive understanding and quantification of the uncertainties in the material response. This contribution enhances the understanding of the CBT and improves the reliability and precision of testing methodologies, which are critical for effective integration of HSC materials into structural applications. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |