TY  - JOUR
U1  - Wissenschaftlicher Artikel
A1  - Heitkamp, Tim
A1  - Goutier, Marijn
A1  - Hilbig, Karl
A1  - Girnth, Simon
A1  - Waldt, Nils
A1  - Klawitter, Günter
A1  - Vietor, Thomas
T1  - Parametric study of piezoresistive structures in continuous fiber reinforced additive manufacturing
JF  - Composites Part C
N2  - Recent advancements in fiber reinforced additive manufacturing leverage the piezoresistivity of continuous carbon fibers. This effect enables the fabrication of structural components with inherent piezoresistive properties suitable for load measurement or structural monitoring. These are achieved without necessitating additional manufacturing or assembly procedures. However, there remain unexplored variables within the domain of continuous fiber-reinforced additive manufacturing. Crucially, the roles of fiber curvature radii and sensing fiber bundle counts have yet to be comprehensively addressed. Additionally, the compression-sensitive nature of printed carbon fiber-reinforced specimens remains a largely unexplored research area. To address these gaps, this study presents experimental analyses on tensile and three-point flexural specimens incorporating sensing carbon fiber strands. All specimens were fabricated with three distinct curvature radii. For the tensile specimens, the number of layers was also varied. Sensing fiber bundles were embedded on both tensile and compression sides of the flexural specimens. Mechanical testing revealed a linear-elastic behavior in the specimens. It was observed that carbon fibers supported the majority of the load, leading to brittle fractures. The resistance measurements showed a dependence on both the number of sensing layers and the radius of curvature, and exhibited a slight decreasing trend in the cyclic tests. Compared with the sensors subjected to tensile stress, the sensors embedded on the compression side showed a lower gauge factor.
KW  - Continuous fiber
KW  - Fiber reinforced additive manufacturing
KW  - 3D printing
KW  - Design for additive manufacturing
KW  - Resistive sensors
KW  - Material extrusion
KW  - Piezoresistive sensors
KW  - Carbon fiber
KW  - Faser
KW  - 3D-Druck
KW  - Resistiver Sensor
KW  - Extrudieren
KW  - Halbleiterdrucksensor
KW  - Kohlenstofffaser
Y1  - 2024
UN  - https://nbn-resolving.org/urn:nbn:de:bsz:960-opus4-30456
SN  - 2666-6820
SS  - 2666-6820
U6  - https://doi.org/10.25968/opus-3045
DO  - https://doi.org/10.25968/opus-3045
VL  - 13
SP  - 17
S1  - 17
ER  -