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An acoustic-emission characterization of the failure modes in polymer-composite materials |
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| Authors: | M Giordano A Calabro C Esposito A D'Amore L Nicolais |
| Affiliation: | a Institute for the Composite Materials Technology, National Research Council, P. le Tecchio, 80125 Naples, Italy b C.I.R.A. Italian Aerospace Research Center, Via Maiorise, 81043 Capua, Italy c Department of Materials and Production Engineering, University of Naples ‘Federico II', P. le Tecchio, 80125 Naples, Italy |
| Abstract: | A new methodology for the analysis of failure modes in composite materials by means of acoustic emission techniques has been developed. A single-carbon-fiber composite based on a polyester matrix, has been used as a simple model. The occurrence of fiber-breakage during tensile loading tests has been observed by a polarized light microscope and concurrently detected by a resonant acoustic probe. The resonant probe has been used as a trigger for the reading of fiber failure events. Single acoustic emission events from a wide-band probe has been recorded for FFT Analysis. The single-fiber specimen, having a unique failure mode, has advantages for the standardization of AE techniques for the quantitative analysis of failures in polymer-composite materials. The same procedure can be exploited to investigate other failure modes namely, fiber matrix solidus debonding and matrix cracking. |
| Keywords: | A polymer-matrix composite D acoustic emission fiber fragmentation |
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