Squeeze-flow rheometry and data analysis of carbon fiber sheet molding compounds
Sprache des Vortragstitels:
Englisch
Original Tagungtitel:
37th Danubia-Adria Symposium on Advances in Experimental Mechanics
Sprache des Tagungstitel:
Englisch
Original Kurzfassung:
Testing device: Squeeze-flow rheometer (two circular steel plates
each equipped with four electrically powered heating cartridges
and three guide pillars to ensure the plates stay parallel during
testing)
Testing machine: Servo-hydraulic MTS 852 damper test system
Testing temperatures: 60, 80 and 100°C
Testing speeds: 0.1, 1 and 10 mm/s
Specimen description: Circular-shaped disks with a diameter of
113 mm were cut out from the CF-SMC mats. Three disks were
stacked to create a test specimen of approx. 5-6 mm thickness.
Test description: Every test run a specimen was placed in the
center of the bottom plate and a specified pre-load was applied
with the top plate until it was uniformly heated to test
temperature. The specimen was then compressed at a constant
actuator speed. The axial force and piston displacement were
recorded. A camera took an image sequence of the side view of the
rheometer containing the advancing flow front. The results show a distinct shearthinning
behavior. The calibrated
temperature dependent power-law
model can be further used in
compression molding simulations.