A New Approach of Waveform Interpretation Applied in Nondestructive Testing of Defects in Rock Bolts Based on Mode Identification

Figure 5

Cross-sectional magnitude displacement U of the wave propagation at 100 kHz along a fully grouted rock bolt at (a) time = 0.1 ms, (b) time = 0.2 ms, (c) time = 0.3 ms, (d) time = 0.4 ms, and (e) time = 0.5 ms.

(a)

(b)

(c)

(d)

(e)