| 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 |
In-Situ Characterization of TuFF Composite Blanks in Diaphragm Forming |
| Author(s) |
Kyle Morris, Thomas A. Cender, Erik Thostenson, Suresh G. Advani |
| On-Site Speaker (Planned) |
Kyle Morris |
| Abstract Scope |
Highly aligned discontinuous fiber (ADF) composite laminates consisting of unidirectional prepreg lamina, is a class of high-performance materials which can be applied to stretch forming processes in order to obtain complex geometry. In order to optimize process conditions and define material forming limits, new methods are needed to determine material properties with representative process conditions. A novel method is developed to characterize the stress-strain response of multiaxial thermoset matrix ADF composite laminates in diaphragm forming. Prepreg blanks and a polymer bladder are formed with a gas bugle method using an Interlaken SP75 highly instrumented forming press to control temperature and gas pressurization. A GOM Aramis 3D digital image correlation (DIC) system to measure surface strain measurement and vertical displacement through a sapphire view port at the top of the press. The materials are formed through a rectangular and a circular mold to induce plane strain biaxial strain respectively. The effect of process conditions were evaluated by testing blanks isothermally at 40-90°C and constant gas pressure 20-200kPa to determine the effect of temperature and strain rate. From the high fidelity full-field displacement and strain map properties such as effective laminate viscosity, strain variability/localization, and forming limits are directly evaluated. The material properties determined in this work will be used to define process requirement and inputs to forming simulations. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |