TY - GEN
T1 - A flexible sensor-based crack identification method for infrastructure structures
AU - Zhou, Zheng
AU - Zhou, Xiang
AU - Wang, Yan
AU - Liu, Yang
N1 - Publisher Copyright:
© 2025 SPIE.
PY - 2025
Y1 - 2025
N2 - In complex environments, the service performances of infrastructure structures are influenced by various coupling effects that result in resistance attenuation and various types of structural defects, with apparent cracks posing the sevious threat to structural safety. Currently, traditional crack identification primarily relies on manual inspection and machine vision-based inspection; however, these methods are unable to monitor the progression of cracks in real time and have low detection efficiency. To address these issues, a structural apparent crack monitoring method using flexible sensor is proposed in this study, enabling real-time tracking of crack development. Firstly, the designed crack-monitoring flexible sensor is fabricated through screen printing, entailing the selection of TPU film as the base material and silver nano ink as the conductive material, and its mechanical-electrical behavior under varying tensile conditions is evaluated; subsequently, a coupling model of the flexible sensor covering structural cracks is established to analyze the evolution of multi-physical field properties during crack development, on this basis, a flexible sensor-based crack identification method for infrastructure structures is proposed; ultimately, the efficacy of the proposed method is demonstrated through concrete crack progression detection during a load test. The results reveal that a linear relationship between crack length and the resistance value of the flexible sensor in small deformation condition, highlighting the precision of the proposed method in micro-crack detection.
AB - In complex environments, the service performances of infrastructure structures are influenced by various coupling effects that result in resistance attenuation and various types of structural defects, with apparent cracks posing the sevious threat to structural safety. Currently, traditional crack identification primarily relies on manual inspection and machine vision-based inspection; however, these methods are unable to monitor the progression of cracks in real time and have low detection efficiency. To address these issues, a structural apparent crack monitoring method using flexible sensor is proposed in this study, enabling real-time tracking of crack development. Firstly, the designed crack-monitoring flexible sensor is fabricated through screen printing, entailing the selection of TPU film as the base material and silver nano ink as the conductive material, and its mechanical-electrical behavior under varying tensile conditions is evaluated; subsequently, a coupling model of the flexible sensor covering structural cracks is established to analyze the evolution of multi-physical field properties during crack development, on this basis, a flexible sensor-based crack identification method for infrastructure structures is proposed; ultimately, the efficacy of the proposed method is demonstrated through concrete crack progression detection during a load test. The results reveal that a linear relationship between crack length and the resistance value of the flexible sensor in small deformation condition, highlighting the precision of the proposed method in micro-crack detection.
KW - Crack identification
KW - Flexible sensor
KW - Infrastructure structures
KW - Screen printing
UR - https://www.scopus.com/pages/publications/105014525253
U2 - 10.1117/12.3051246
DO - 10.1117/12.3051246
M3 - 会议稿件
AN - SCOPUS:105014525253
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2025
A2 - Limongelli, Maria Pina
A2 - Ng, Ching Tai
A2 - Ozevin, Didem
PB - SPIE
T2 - Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2025
Y2 - 17 March 2025 through 20 March 2025
ER -