Current extrusion-based polymer and composite 3D printing technologies such as FDM and FFF are prone to property anisotropy where the strength of built material can be significantly lower than other directions. Short of process parameter optimization, a cost-effective yet capable technique to remove property anisotropy does not exist. In this presentation, an introduction and preliminary results are presented where a straight forward technique to incorporate ultrasonic vibrations into the FFF 3D printing technology will be discussed. Evidence of significant increase in the strength in the build direction and the potential to obtain engineered properties is presented. This technique can be easily implemented in FFF technology in various configurations and does not require any pre- or post-printing processing of the feedstock or printed part to achieve desired enhancements. The effects of ultrasonic vibrations in the form of oscillatory pressure variations on filament-layer interfaces are also discussed and presented to allow a deeper understanding of the physical principles of the technique. This in-process FFF/FDM process modification technique can be applied to low-cost desktop hobbyist 3D printers, and high-end industrial production systems alike.
- Understand how the technique works.
- Learn the benefit of using this technique.
- Understand new engineered properties in FFF/FDM printed parts.