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Abstract
The influence of process parameters and their interactions on the interlaminar shear strength (ILSS) of additively manufactured CF-PEEK composites was investigated. The composites were made using a hot gas torch (HGT)-based automated fibre placement (AFP) process. Experimental short beam shear (SBS) tests and FEA numerical simulations with bonding models were conducted to generate data. Various process parameter combinations were analyzed using full-factorial statistical assessment. Results show that ILSS increases with decreasing deposition speeds and increasing HGT temperatures, with consolidation forces having a milder effect. A strong interaction effect between parameters was observed, and the effect of HGT temperature on ILSS depends on material deposition speed. The optimum ILSS were at low deposition speeds (76 mm/s) with high HGT temperatures (900 °C or 950 °C), also evident in the fracture surfaces. This database can aid smart production planning in additive manufacturing of composites by optimizing process parameters for maximum interlaminar strength.
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