LASER GENERATED LAMB WAVES IN COMPOSITE MATERIALS USING EMBEDDED FIBER OPTIC DELIVERY SYSTEM

摘要

The present experiments, which can be considered as a preliminary work, demonstrate that embedded fibers, with diameter of the order of 100 to 200 μm can be used as delivery systems for laser pulses, capable of generating Lamb waves propagating in composite materials at distances of several centimeters. Nevertheless, the possibility of using such ultrasound sources for integrated health monitoring systems will depend on the sensitivity of the embedded detectors used. Presently the displacements generated are very weak and need the summation of a high number of pulses.