Loosening of threaded fasteners can cause preload decline, induce bolt fatigue fracture, and
severely compromise the reliability of mechanical products. Loosening detection is an …

Sensors play a large role in monitoring and ensuring that environmental parameters satisfy
industrial requirements. They offer crucial safety measures in the early detection of hazards …

Bolts are widely applied to the connections of structural components. Under the actions of
alternative forces induced by the external loads, the bolts are commonly inevitable to be …

For connection status monitoring of bolted joint groups, a novel method with fiber Bragg
grating (FBG)-based curvature sensor is proposed. An FBG curvature sensor with an …

A quantitative monitoring method for bolt looseness using an elastic substrate fiber Bragg
grating (FBG) bending sensor is presented in this paper, which is achieved by measuring …

We demonstrated a cross-sensitivity-free torsion and strain sensor, which was achieved by
using the two concatenated dispersion-turning-point (DTP)-customizable helical long-period …

A reflective-type fiber sensor allowing the simultaneous measurements of directional torsion,
strain, and temperature is proposed and experimentally demonstrated, which is realized by …

Strain-based non-intrusive approaches for measuring the pressure of pipes have attracted
widespread attention due to their great convenience and ability to avoid destroying the …

Brittle fracture of the composite insulator is a malignant accident. There is a lack of means to
monitor the formation and expansion of stress corrosion cracking in rods, resulting in little …

In the paper, experimental studies of an asymmetric preloaded sevenbolted connection are
presented. The tightening process of the connection was carried out with a wrench …