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Title: INTERLAYER FRACTURE OF LARGE AREA ADDITIVE MANUFACTURED SHORT FIBER COMPOSITES
This paper proposes an efficient experimental method to measure the mode I fracture toughness of large-area additive manufactured polymeric composites. By utilizing either single-bead or double-bead systems bonded to the double cantilever beam (DCB) configuration, we measure intrabead and interbead fracture toughness of acrylonitrile butadiene styrene (ABS) and short carbon fiber-reinforced ABS. The effect of rigid doublers (which are used to eliminate a premature compressive failure) is excluded in the calculation of total energy dissipation, producing a purely interlayer fracture toughness. We found that the critical fracture toughness of carbon fiber/ABS is lower than that of ABS due to the voids within and between the beads. The experimental and data reduction methods developed here can be utilized to optimize the interlayer adhesion of large-scale 3D printed materials.  more » « less
Award ID(s):
2055628
PAR ID:
10608199
Author(s) / Creator(s):
; ;
Publisher / Repository:
2024 Solid Freeform Fabrication Conference
Date Published:
Format(s):
Medium: X
Location:
Austin, Texas
Sponsoring Org:
National Science Foundation
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