Fatigue behaviour and structural health monitoring by acoustic emission of E-glass/epoxy laminates with piezoelectric implant |
| |
Authors: | Sahir Masmoudi,Abderrahim El Mahi,Saï d Turki |
| |
Affiliation: | 1. LUNAM University: Maine University, Acoustic Laboratory of Maine University (LAUM) CNRS UMR 6613, Avenue Olivier Messiaen, 72085 Le Mans CEDEX 9, France;2. Sfax University, Faculty of Sciences of Sfax, Department of Physics, BP1171, 3000 Sfax, Tunisia |
| |
Abstract: | This paper represents the continuation of our research on built-in piezoelectric sensor for structural health monitoring of composite materials. Experimental research is focused on examining the effects of the embedded sensors on the structural integrity of composite laminates subjected to mechanical tests. A series of composite specimens with and without embedded sensor are tested in fatigue loading while constantly monitoring the response by acoustic emission technique. The acoustic signals are analysed using the classification k-means method in order to identify the different damage mechanisms and to follow the evolution of these mechanisms for both types of composite materials (with and without sensor). The mechanical behaviour of composites with and without embedded sensor shows no difference in the form. The incorporation of piezoelectric sensor causes low degradation of mechanical properties of composites. Comparing embedded sensor to sensor mounted on the surface, the embedded sensor showed a much higher sensitivity. It is thus verified that the embedded acoustic emission sensor had great potential for acoustic emission monitoring in fibre reinforced composite structures. |
| |
Keywords: | Composite laminates Piezoelectric implant Fatigue test Damage Failure Acoustic emission |
本文献已被 ScienceDirect 等数据库收录! |
|