What question did this study set out to answer?

The aim is to understand the interaction and measurement errors between UWFBG sensors and asphalt pavements under load.

March 13, 2026CoatingsOpen Access

Simulation and Monitoring of Interfacial Microcracks Between Ultra-Weak Fiber Bragg Grating Sensor and Asphalt Mixture

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Analyzes microcrack behavior in asphalt mixtures with UWFBG sensors, suggesting implications for strain monitoring accuracy.

The aim is to understand the interaction and measurement errors between UWFBG sensors and asphalt pavements under load.
Constructed a mesoscopic model of asphalt with UWFBG using a discrete element model.
Analyzed microcrack propagation at the interface under various loading stages.
Identified the quantitative relationship between crack width and monitoring strain.
Displacement exceeding 1.4 mm leads to a marked increase in damage and microcracks.
High strain at the UWFBG interface during tensile loads sharply increases microcrack growth.
Without sensors, a linear relationship between monitoring strain and crack width is observed.

Hua et al. (2026) studied this question.

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