Abstract
The epoxy-glass composite pipes of l=330, 800 and 1000 mm in length and φ=30, 35, 41 mm in diameter were subject to torsion till failure. The pipes were formed by filament winding on the mandrel at the angle α=22°,27°,32° for successive diameters. Torsional angle, torsional moment and acoustic emission (AE) were recorded during the test. This paper represents an attempt to use fractal analysis software to process data obtained from AE testing. It shows the dependence of fractal measure and fractal dimension on the amplitude of acoustic events along the axis of the tested pipe in their relation to the spatial distribution of defects in the material.
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Cetera, A., BŁażejewski, W. Fractal characteristics of composite pipes defects in torsion testing. International Journal of Fracture 113, 253–265 (2002). https://doi.org/10.1023/A:1014264810113
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DOI: https://doi.org/10.1023/A:1014264810113