Abstract
Fatigue Life Monitoring is crucial to ensure engineering structures' safety and durability. This paper introduces an innovative approach for fatigue life monitoring using a soft PZT (Lead Zirconate Titanate) piezoelectric sensor operating in buckling mode to measure applied cyclic strains. A particular emphasis is on the utilization of a 3D-printed 'Extension' that serves as the platform upon which the PZT sensor is installed and operates in buckling mode while subjected to cyclic strains. An analytical framework is presented, which encompasses the development of the governing equations to establish a direct relationship between dynamic strain values and the sensor's output. Critical strain attributes, such as amplitude and occurrence strain rate also taken into account. The analytical solutions are validated by a series of experimental tests under various dynamic loading conditions. The PZT sensor, when integrated with the 3D-printed extension and operated in buckling mode, exhibits high sensitivity and functions as a passive dynamic strain measurement sensor, with high potential to be used as self-powered sensor nodes for fatigue life monitoring of engineering structures.
Published Version
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