Preliminary investigation of heterogeneity in the microzone of composites by laser ultrasonic probe measurements
Source abstract
Abstract
We carry out a preliminary investigation of heterogeneity in the microzone of composites by using a laser ultrasonic probe to measure the time-of- flight (TOF) of the laser-excited longitudinal (L-) and transverse (S-) waves that propagate within the samples. The influence of the number of fibers on the inhomogeneity of the TOF is observed. The results show that the heterogeneity of the TOF in a small region within a composite can be observed with a resolution of 2 ns in time and 50 μm in space. The S-wave is better than the L-wave for examining the heterogeneity. The change in the TOF for the sample with two fibers is smaller than that for the sample with one fiber.
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Research context
OpenAlex topics: Ultrasonics and Acoustic Wave Propagation · Smart Materials for Construction · Mechanical Behavior of Composites
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References (26)
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