Journal of Materials and Engineering Structures
Volume 13, Numéro 3, Pages 481-492
2026-09-30
Characterization And Performance Evaluation Of Thick-film Based Strain Sensors For Structural Health Monitoring Applications
Authors : Stanimirović Ivanka . Stanimirović Pavle . Savić Aleksandar . Stanimirović Zdravko .
Abstract
This paper investigates the use of sintered thick resistive films as strain sensors for the health monitoring of structural components commonly encountered in modern civil engineering applications. A series of thick-film strain sensors was developed and tested to assess their feasibility for integration with steel bars. The sensors were fabricated by combining a Pd/Ag conductive composition with a thick resistive film based on bismuth-ruthenate, which was deposited and sintered on alumina ceramic substrates. The sensors underwent a three-point bending test in their freestanding form, while a four-point bending test was conducted on sensors adhered to the upper surface of steel bars to simulate real-world conditions. Under mechanical strain, reversible deformations in the sensor were detected as changes in the resistivity of the thick resistive film. The performance of the sensors was evaluated through a series of tests, including resistance measurements, gauge factor calculations, temperature stability analysis and high-voltage surge testing. These evaluations provide valuable insights into the suitability of thick-film sensors for structural health monitoring in civil engineering, particularly in relation to steel constructions.
Keywords
Sintered thick resistive film ; Structural health monitoring ; Strain-sensing technology ; Steel constructions
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