Abstract
Loosening of threaded fasteners can lead to a decrease in preload, cause fatigue failure of bolts and seriously reduce the reliability of mechanical structures. Timely detection of such a weakening is an effective method of early prevention of a man-made disaster or economic losses. A promising direction in the field of monitoring the condition of complex structures during their operation is associated with the creation of intelligent materials or smart systems based on the use of sensor elements. The paper considers the main technical problems of operation of an intelligent fastener – a bolted connection with an integrated fiber Bragg grating (VBR). Calculations and strength tests of intelligent fasteners are given, problems arising during the operation of such systems and ways to solve them are described
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