Articles | Volume 14, issue 2
https://doi.org/10.5194/jsss-14-259-2025
Special issue:
https://doi.org/10.5194/jsss-14-259-2025
Regular research article
 | 
28 Oct 2025
Regular research article |  | 28 Oct 2025

Silicon-based strain gauge sensors embedded in composite structures for real-time strain and creep analysis

Gaëtan Herry, William Caroba, Maxime Harnois, and France Le Bihan

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J. Sens. Sens. Syst., 14, 133–137, https://doi.org/10.5194/jsss-14-133-2025,https://doi.org/10.5194/jsss-14-133-2025, 2025
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Cited articles

Ahmed, S., Bodaghi, M., Nauman, S., and Muhammad Khan, Z.: Additive Manufacturing of Flexible Strain Sensors Based on Smart Composites for Structural Health Monitoring with High Accuracy and Fidelity, Advanced Engineering Materials, 25, 2300763, https://doi.org/10.1002/adem.202300763, 2023. 
French, P. J. and Evans, A. G. R.: Piezoresistance in polysilicon and its applications to strain gauges, Solid-State Electronics, 32, 1–10, https://doi.org/10.1016/0038-1101(89)90041-5, 1989. 
Garcia Castro, F., de Sagazan, O., Coulon, N., Simon, C., and Le Bihan, F.: ICP-CVD μ-Si Layers Optimization for Strain Gauges on Flexible Substrates, Sensors and Actuators A: Physical, 315, 112261, https://doi.org/10.1016/j.sna.2020.112261, 2020. 
Harussani, M. M.: Recent applications of carbon-based composites in defence industry: A review, Defence Technology, 18, 1281–1300, https://doi.org/10.1016/j.dt.2022.03.006, 2022. 
Herry, G., Fustec, J.-C., Le Bihan, F., and Harnois, M.: Substrate-Free Transfer of Silicon- and Metallic-Based Strain Sensors on Textile and in Composite Material for Structural Health Monitoring, ACS Appl. Mater. Interfaces, 16, 22113–22121, https://doi.org/10.1021/acsami.4c01055, 2024. 
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Short summary
This study demonstrates how integrating silicon mechanical sensors into composites enables the detection of internal structural variations and how this can find applications in process monitoring or structural health monitoring (SHM). It introduces a novel, minimally intrusive process for embedding sensors within composites by means of a substrate-free transfer technique. Temperature and strain effects are studied. The sensor exhibits high sensitivity and is able to detect a creep effect at the core of the composite.
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