Acoustic emission signals resulting from the dryinginduced fractures of Phyllostachys pubescens bamboo: evidence of scale free phenomena
Fecha
2016Autor
Villalobos, Gabriel
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Resumen
Acoustic Emission (AE) is a noninvasive tool for evaluation of damage
and fracture. In this paper, results of AE study of the drying process of Phyllostachys
pubescens bamboo are reported. The histogram of experimental squared
voltage distributions follows a power law with an exponent of 1:16. The histogram
of maximum amplitudes Vmax usually studied in the AE literature also shows a
power law with a slope of 2:4 (b-value of 2.4). This is reminiscent of scale free
phenomena. Another novel aspect for bamboo literature is the calculation of the
average signal shape for different time spans of the system. The shape has an
asymmetrical shape for both long- and short-span signals, but shows a symmetrical
shape for middle-span signals. This is an indication of a reinforcing feedback
process, known in the statistical mechanics of fracture as an avalanche.
Palabras clave
Acoustic emission; Dryinginduced fractures; PhenomenaEnlace al recurso
https://doi.org/10.1007/s00226-016-0798-0Colecciones
- Año 2016 [88]
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