Prediction of the peak and steady-state ply–ply friction response for UD C/PAEK tapes

Excessive ply-ply friction can lead to process-induced defects during the hot press forming of thermoplastic composite laminates. Process simulations be used enable first-time-right defect-free manufacturing. However, a good understanding is required improve constitutive models allow simulation more complex parts. We performed experiments on UD C/PAEK tapes, showing typical response with peak followed by steady-state friction. Micrographs tested specimens were analyzed evaluate matrix interlayer thickness distribution in interface, which we combined viscosity predict Generated fiber distributions, mimicking successfully obtain as well. The was accurately described including critical shear stress represent wall slip, substantiating concept slip dominant underlying mechanism for start-up response. • Ply-ply tests tapes wide range rates. increases rate, while reaches plateau. predicted from interface and viscosity. using slip. gradual increase explains observed