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3D-Printed Strain Gauges Based on Conductive Filament for Experimental Stress Analysis

Chadda, Romol ; Dali, Omar Ben ; Latsch, Bastian ; Sundaralingam, Esan ; Kupnik, Mario (2024)
3D-Printed Strain Gauges Based on Conductive Filament for Experimental Stress Analysis.
IEEE SENSORS 2023. Vienna, Austria (29.10.2023-01.11.2023)
doi: 10.26083/tuprints-00027318
Conference or Workshop Item, Secondary publication, Postprint

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Item Type: Conference or Workshop Item
Type of entry: Secondary publication
Title: 3D-Printed Strain Gauges Based on Conductive Filament for Experimental Stress Analysis
Language: English
Date: 3 May 2024
Place of Publication: Darmstadt
Year of primary publication: 2023
Place of primary publication: Piscataway, NJ
Publisher: IEEE
Book Title: 2023 IEEE SENSORS Proceedings
Collation: 4 Seiten
Event Title: IEEE SENSORS 2023
Event Location: Vienna, Austria
Event Dates: 29.10.2023-01.11.2023
DOI: 10.26083/tuprints-00027318
Corresponding Links:
Origin: Secondary publication service
Abstract:

We present a method for manufacturing 3D-printed strain gauges by means of fused filament fabrication that are suitable for experimental stress analysis applications. The 3D-printed strain gauge (SG) is based on a multilayer structure, which is similar to the design of conventional metal foil SGs. This involves printing a meander-shaped measuring grid layer consisting of a conductive compound filament on a layer of non-conductive PLA that serves as a substrate. In order to evaluate the strain sensing behavior of the 3D-printed SG, it is bonded onto a steel plate by means of a cold curing superglue that undergoes a bending load of 30 N. Here, a finite element analysis is conducted for determining a proper position that ensures a high strain while not exceeding the yield strength. Our results show a reproducible behavior of the change in resistance of the 3D-printed SG in response to the bending load. Despite an existing creep that is based on the polymer properties of the filament, a linear behavior of the change in resistance linearity error of ±4 % is present. Furthermore, the sensitivity of the 3D-printed SG is four times higher than that of conventional metal foil strain gauges. Thus, these results confirm that the 3D-printed SG is a cost-effective alternative for strain sensing applications.

Uncontrolled Keywords: Resistance, Sensitivity, Bending, Strain measurement, Sensors, Behavioral sciences, Steel, strain gauge, force sensing, 3D-printed
Status: Postprint
URN: urn:nbn:de:tuda-tuprints-273184
Classification DDC: 600 Technology, medicine, applied sciences > 621.3 Electrical engineering, electronics
Divisions: 18 Department of Electrical Engineering and Information Technology > Measurement and Sensor Technology
Date Deposited: 03 May 2024 12:23
Last Modified: 08 Nov 2024 11:05
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/27318
PPN: 518940179
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