The strength of 3D printed parts was not considered in this thesis. However, CLT, through an iterative algorithm, can also be used to model the strength. It would be worthwhile to validate the strength modelling of CLT as well.
In this study, all the laminates are chosen to be symmetric and balanced to eliminate shear- extension, bending-extension, and bending-twisting coupling effects. However, CLT can be used to intentionally design these coupling effects to create “smart” materials that can deform in interesting ways in response to stress. An avenue of future work could be applying CLT to design smart 3D printed laminates.
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This thesis did not investigate the sandwich panels in detail but the use of low-density infill in FFF is widespread. The orientation dependent anisotropy of the honeycomb infill was
discovered, even though conventional honeycombs are isotropic. This was due to the double- walled honeycomb toolpath which was optimized for print efficiency rather than geometric regularity. There are also other low-density infill patterns such as the rectangular grid, triangular grid, wiggle, and even three-dimensional geometries. It would be ideal to be able to predict the properties of these infill patterns for CLT use.
Finally, the potential for orienting the fibers in an FFF 3D printer is not fully explored. For example, it is possible to print the core of the sandwich panel at a build orientation that aligns the fibers perpendicular to the skins, maximizing the compression modulus of the core against loading in the z-direction. Developing different ways to control the fiber orientation in specific parts of a 3D printed FRP is largely unexplored.
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