27 декабря, 2015 
Pokraskin A comparison between FE simulations and FBG measurements was made. The result is shown in Figure 7 for a crack length of 7 mm. The BFS distribution measured by an array of FBG sensors and interpolated by spline interpolation has a similar trend as the FEM results, as shown in Figure 7.
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Figure 7. BFS distribution Comparison between FE analysis and FBG measurements for 7.0 mm crack length. |
Although the position of the negative peak of BFS profile inferred from FBG measurements does not exactly match the crack position, presumably due to the presence of non-homogeneous strain field in woven composite, this approach showed great potential for crack detection. In facts, during crack propagation, a linear correlation was found between the position of the crack tip measured by optical microscope observation and the position of the negative peak of the BFS distribution.
Опубликовано в рубрике 