|About this Abstract
||NUMIFORM 2019: The 13th International Conference on Numerical Methods in Industrial Forming Processes
||S-14: Composites Forming
||Numerical Evaluation of Reinforcement Morphology Contribution to Process-induced Residual Stresses in 3D Woven Composites
||Kostiantyn Vasylevskyi, Hilary Buntrock, Todd Gross, Borys Drach, Igor Tsukrov
|On-Site Speaker (Planned)
3D woven composites, in particular carbon/epoxy, are being increasingly adopted in aerospace, wind energy, transportation and other industries.
They are often produced by resin transfer molding with epoxy cured at elevated temperature. This process sometimes results in high level of residual stresses due to the mismatch in thermal expansion coefficients between carbon and epoxy.
In this paper we, utilize numerical modeling in combination with blind hole drilling experiments to determine residual stresses in 3D composites with various reinforcement architectures. In particular, we evaluate individual contributions of warp, weft and binder tows to the residual stress state.
Our studies show that these contributions are determined by both arrangement and orientation of the tows. The developed numerical modeling tool can be used in design of reinforcement architectures with reduced levels of residual stresses.