About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
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Symposium
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Functional Nanomaterials: Functional Low-dimensional Materials (0D, 1D, 2D) Driving Innovations in Electronics, Energy, Sensors, and Environmental Engineering and Science 2021
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Presentation Title |
Wireless Strain Field Mapping of Metallic Surfaces through THz Time Domain Spectroscopy of Electrostrictive Coating Acting as Passive Sensor |
Author(s) |
Luis M. Reig Buades, Abhijeet Dhiman, Vikas Tomar |
On-Site Speaker (Planned) |
Luis M. Reig Buades |
Abstract Scope |
Accurate mapping of strain fields yields important information of a material’s mechanical behavior, having important applications in structural monitoring, non-destructive testing, and characterization. In this work, a novel method of passive strain sensing on metals is introduced, it consists in measuring changes of an electromagnetic pulse in the THz range that goes through a coating attached to a metallic surface. This coating, composed of high dielectric micro-particles dispersed in a low dielectric matrix, shows a high electrostrictive behavior, meaning its dielectric constant changes when strained. This change in dielectric will affect the spectroscopy measurement of a THz wave that goes through the coating and reflects on the metal surface to a detector. By using this property, together with the high-resolution of THz waves and its ability to penetrate dielectrics, a passive strain mapping technique has been developed that allows to carry out measurements even with opaque materials in the beam-path. |
Proceedings Inclusion? |
Planned: |