Continuous fiber against carbon fiber filled
Two materials are easily confused. Carbon Fiber Filled has short fibers mixed into the filament. CFF is a continuous fiber laid along the contour of the layer. This study compares them on one part.
The labels inside the chart are in Serbian. Every value in the chart is repeated in the table below.
What was compared
The same finger shape and the same forces. Three versions: V0 in Carbon Fiber Filled, V1 with CFF in all layers and V2 with CFF in the outer layers only. For each version a stiffness and strength calculation gave the deflection of the contact strips and the utilisation of the material.
Results
| Measure | V0 Carbon Fiber Filled | V1 CFF, all layers | V2 CFF, outer layers |
|---|---|---|---|
| Deflection of the contact strips (mm), allowed 0.3 | 0.305 | 0.112 | 0.185 |
| Utilisation between layers | 0.71 | 0.66 | 0.70 |
| Utilisation of the matrix in the layer plane | 0.37 | 0.32 | 0.33 |
| Fiber cost per piece (assumption 4 €/cm³) | none | 37 € | 14 € |
What the numbers say
- With continuous fiber in all layers the deflection falls to 37 % of the filled version, from 0.305 to 0.112 mm. The filled version sits just above the allowed 0.3 mm.
- Fiber only in the outer layers (V2) gives 0.185 mm for 14 € of fiber, against 37 € for fiber in all layers.
- The utilisation between layers barely changes (0.71, 0.66, 0.70). Fiber buys stiffness, not the bond between layers.
- The fiber itself is used to 0.34 at most in V1, so the fiber is not the limit. The weak point stays the layer bond.
This is a calculation, not a test of printed fingers. Fiber prices are an assumption.
Check your part
Check a partLast updated: