Application of ultrasonic testing for the quantitative assessment of wood element degradation
Słowa kluczowe:
ultrasonic testing; NDT; structural timber; structural diagnostics; wood decayAbstrakt
The article presents the results of research on the possibility of using the ultrasonic method to assess the degree of degradation of wooden cross-sections, illustrated using floor beams originating from a 19th-century timber structure. Samples with various levels of cross-sectional damage were prepared by gradually removing layers of the material. Measurements were carried out in a direct transmission setup using a Pundit Lab+ device. The analysis results indicate a strong, non-linear relationship between ultrasonic wave velocity and the proportion of decayed wood in the cross-section, accurately described by an exponential function. Even a minor degree of cross-sectional degradation leads to a noticeable decrease in ultrasonic pulse velocity. The obtained relationships confirm the high effectiveness of ultrasonic testing as a non-destructive testing method for assessing the integrity of wooden sections, as well as its usefulness in the diagnostics of in-service structures, especially historical ones.
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