Squeeze-flow rheometry and data analysis of carbon fiber sheet molding compounds

Description

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.

Period	22 Sept 2021
Event title	37th Danubia-Adria Symposium on Advances in Experimental Mechanics
Event type	Conference
Location	AustriaShow on map