Effect of Piezoelectric Implant on the Structural Integrity of Composite Laminates Subjected to Tensile Loads
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Effect of Piezoelectric Implant on the Structural Integrity of Composite Laminates Subjected to Tensile Loads Sahir Masmoudi 1,2 & Abderrahim El Mahi 1 & Saïd Turki 2
Received: 19 April 2016 / Accepted: 20 June 2016 # Springer Science+Business Media Dordrecht 2016
Abstract The embedment of sensors within composite structures gives the opportunity to develop smart materials for health and usage monitoring systems. This study investigates the use of acoustic emission monitoring with embedded piezoelectric sensor during mechanical tests in order to identify the effects of introducing the sensor into the composite materials. The composite specimen with and without embedded sensor were subject to tensile static and fatigue loading. The analysis and observation of AE signals show that the integration of a sensor presents advantage of the detection of the acoustic events and also show the presence of three or four types of damage during tests. The incorporation of piezoelectric sensor has a negligible influence on the mechanical properties of materials. Keywords Composite material . Tensile test . Fatigue . Piezoelectric implant . Acoustic emission . Damage
1 Introduction There is an increasing awareness of the benefits to be derived from the development and exploitation of smart materials and structures in applications ranging from hydrospace to aerospace. With the ability to respond autonomously to changes in their environment, smart systems can offer a simplified approach to the control of various material and system characteristics such as light transmission, strain, noise and vibration which depend on the smart materials used [1, 2]. Smart structures with integrated sensors and actuator materials might eliminate the need for heavy mechanical actuation systems or damping systems through their functionality for shape change or vibration control. The choice of the integrated system
* Sahir Masmoudi [email protected]
1
LUNAM University: Maine University, Acoustic Laboratory of Maine University (LAUM) CNRS UMR 6613, Avenue Olivier Messiaen, 72085, Cedex 9 Le Mans, France
2
Sfax University, Sciences Faculty of Sfax, Physics Department BP1171, 3000 Sfax, Tunisia
Appl Compos Mater
must be guided by the respect of the material integrity through its ability to receive sensitive sensors [3, 4]. In particular, the loss of mechanical properties and failure strength due to the presence of the insert must be minimized. Notwithstanding the developments in sensor technology, the study of the effects of embedded transducers on the host composite is still of relevant importance. For the last few decades, many works [5–8] have been focusing on the feasibility of the embedment of different types of sensors and devices both evaluating the durability of the integrated transducers and quantifying the strength and fatigue life of the host material. For example, Kim et al. [9] studied the strengths under uniaxial compressive and three-point bending loads of the integrated graphite composites. They implanted strain gauges or t
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