Calibration of piezoresistive shape-memory alloy strain sensors
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
Continuous strain measurement on fibre-reinforced structures demands mechanical sensors with superior fatigue resistance. Shape-memory alloy wires are predestined for strain sensors utilising their strong piezo-resistance. Calibration of these sensors is necessary in order to extract mechanical data. Therefore, four-point bending of glass-fibre reinforced plastic specimens with applied strain sensors and an optical reference measuring system is used to calibrate and compare shape-memory alloy sensors and standard strain gauges. The gauge factor and its standard deviation is successfully measured by this calibration method. Shape-memory alloy sensors show strain-dependent gauge factor whilst standard strain gauges show a constant strain sensitivity, both with a narrow stochastic distribution. Shape-memory alloy mechanical sensors are reliable to determine strain of fibre-reinforced structures. This offers the possibility to use them in structural health monitoring applications of such structures. Consequently, the four-point bending calibration using glass-fibre reinforced specimens represents a suitable possibility for calibration of strain sensors exposed to higher strain amplitudes.
Details
Originalsprache | Englisch |
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Seiten (von - bis) | 1465-1472 |
Seitenumfang | 8 |
Fachzeitschrift | Journal of intelligent material systems and structures |
Jahrgang | 33 |
Ausgabenummer | 11 |
Frühes Online-Datum | 4 Nov. 2021 |
Publikationsstatus | Veröffentlicht - 1 Juli 2022 |
Peer-Review-Status | Ja |
Externe IDs
ORCID | /0000-0002-8854-7726/work/142242066 |
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Schlagworte
DFG-Fachsystematik nach Fachkollegium
ASJC Scopus Sachgebiete
Schlagwörter
- Calibration, fatigue, mechanical sensors, piezoresistance, shape-memory alloys, strain measurement