Experimental strength and fracture analysis of AM CCF lugs with load-tailored fibre placement

Description

Additive manufacturing (AM) using continuous carbon fibre (CCF) has facilitated the use of carbon fibre reinforced polymers (CFRP) with AM in structural parts. This paper focusses on the static behaviour of AM CCF lugs printed to an optimised fibre lay-up and with two different CCF fibre volume fractions φ, originating from variation of the layer height. Experimental testing using full field surface strain measurement is performed. The part strength, bearing stiffness, and shaft stiffness values are evaluated. The most significant benefit is gained in part strength, an increase by 61% with increase in φ from 0.27 to 0.37. The stiffness values are increased to a lesser degree. Fracture behaviour is shown to be fibre fracture dominated in the net section, and linear strain increase is reported until failure. These results show the potential of this technology for structural parts, and give the experimental base for strength and stiffness design optimisations in AM CCF lugs.

Period	30 Jun 2022
Event title	European Conference on Fracture - ECF23
Event type	Conference
Location	PortugalShow on map