Structural health monitoring SHM of aerospace composites

Structural health monitoring (SHM) rehes on sensors that can be permanently placed on the stracture and monitored over time either in a passive or in an active way. These sensors should be affordable, hghtweight, and unobtrasive such as to not impose cost and weight penalty on the stmcture and to not interfere with the structural strength and airworthiness. Some of the sensor types that have been considered for SHM appUca-tions are  

Polymer Composites in the Aerospace Industry. htlp //d8 .dd.oi l0.1016/B978-0-85709-523-7.00016-5 

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