I am researching the fatigue properties of carbon filament, specifically PA6-GF. To fabricate the specimens, I would like to know what percentage of infill achieves the highest strength-to-infill ratio when printing PA6-GF using a honeycomb or gyroid pattern.
Does anyone have knowledge or experience with this?
Well, the PA6-GF is not a carbon filament. The GF stands for “Glass Fibre”. For carbon fibre, Bambu offers the PA6-CF.
To obtain meaningfull data, it is important to have a standardized approach to be able to differentiate cause and effect. So as a first set, go for a 100% infill to obtain basic and comparable data.
Then, you’ll already have a lot of printing and testing ahead of you as there are many influences to assess even if limited to perfectly dry material. XY differs significantly from Z properties in printed objects, layer height/settings, temps, cool down,… all can influence fatigue performance. And then there’s porosity. Even my well dried TPU prints consistently show a 20% weight difference between CAD weight and print measured weight. That’ll show in fatigue data…
Thank you for your reply.
I am also looking for previous studies, do you know of any papers that say so?
I think this may give you a good starting point.