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Recognition of Damage Modes and Hilbert–Huang Transform Analyses of 3D Braided Composites

1
School of Textiles, Tianjin Polytechnic University, Tianjin 300387, China
2
Supervisory and Evaluation Office, Tianjin Radio & TV University, Tianjin 300191, China
3
School of Computer Science and Software Engineering, Tianjin Polytechnic University, Tianjin 300387, China
4
Composites Research Institute, Tianjin Polytechnic University, Tianjin 300387, China
5
Centre for Nano Scale Science and Technology, and School of Computer Science, Engineering, and Mathematics, Flinders University, Adelaide, SA 5042, Australia
*
Authors to whom correspondence should be addressed.
J. Compos. Sci. 2018, 2(4), 65; https://doi.org/10.3390/jcs2040065
Received: 30 October 2018 / Revised: 7 November 2018 / Accepted: 12 November 2018 / Published: 14 November 2018
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Abstract

The identification and classification of acoustic emission (AE) based failure modes are complex due to the fact that AE waves are generally released simultaneously from all AE-emitting damage sources. To fully understand the occurrence of damage and the damage evolution law of 3D braided composites, the tensile response characteristics and failure mechanisms of such composites were revealed by experiments, followed by frequency domain analyses. The results indicated good correlation between the number of AE events and the evolution of damage in 3D braided composites. After an AE signal was decomposed by the Hilbert–Huang transform (HHT) method, it might extract and separate all damage modes included in this AE signal. Additionally, the frequency saltation in the HHT spectra implied changes in the failure mode of the 3D braided composites. This study provides an effective new method for the analysis of the tensile fracture mechanism in 3D braided composites. View Full-Text
Keywords: polymer-matrix composites; numerical analysis; acoustic emission; Hilbert–Huang transform (HHT) polymer-matrix composites; numerical analysis; acoustic emission; Hilbert–Huang transform (HHT)
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MDPI and ACS Style

Ding, G.; Sun, L.; Wan, Z.; Li, J.; Pei, X.; Tang, Y. Recognition of Damage Modes and Hilbert–Huang Transform Analyses of 3D Braided Composites. J. Compos. Sci. 2018, 2, 65.

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