The Morpho team, represented by ENSAM, will participate at the 11th European Workshop on Structural Health Monitoring (EWSHM 2024) in Session Mo.1.B: Aerospace – Data Acquisition 1, chaired by Peter Wierach from the German Aerospace Center (DLR) and Claudio Sbarufatti from Politecnico di Milano. This session will take place in Room D1+D2 and will cover advancements in SHM technology for aerospace applications.
The presentation, titled “Printed PZT Transducers Network for the Structural Health Monitoring of Foreign Object Damage Composite Panel“, is scheduled for 12:10 pm on Monday, June 10, 2024. Shweta Paunikar, a postdoctoral researcher at Laboratoire Procédés et Ingénierie en Mécanique et Matériaux – ENSAM/CNRS/CNAM in Paris, France, will deliver the presentation.
Abstract:
The work presented focuses on the structural health monitoring (SHM) of a foreign object damage (FOD) composite panel equipped with an innovative printed piezoelectric transducer network. The 3D woven composite FOD panel measures approximately 800 mm x 320 mm, is curved with a cross-sectional thickness varying from approximately 2 mm to 12 mm, and a stainless-steel leading edge is bonded at one of its sides. The core idea explored here is to rely on an innovative screen-printing technology to print a full piezoelectric transducer, allowing for successful SHM on such a complex composite structure. This work is being carried out within the European project MORPHO – H2020.
After printing a 25-element PZT network, a four-point bending fatigue experimental campaign using the PZT network along with other sensor technologies (embedded optical fibres with FBG sensors and acoustic emission sensors) is carried out. This unique experimental campaign generates data that will help develop diagnostic and prognostic methodologies for remaining life estimation and SHM of the FOD panel.
It is demonstrated through impedance measurements that the printing process associated with the printed PZT transducers is highly repeatable, thus validating its use at a larger industrial scale. Furthermore, the printed piezoelectric transducers are shown to be able to detect foreign object impacts and sense Lamb wave signals. This innovative printing technology for PZT transducer networks is thus extremely promising. It is highly advantageous to use printed transducers for SHM instead of regular ceramic ones, as this technology is non-intrusive, adds negligible weight, can be printed during the manufacturing process, and arrays of transducers ensure the easy availability of another transducer in case of failure of one.
The authors of this study include Shweta Paunikar, George Galanopoulos, Marc Rebillat, Ingo Wirth, Eric Monteiro, Pierre Margerit, and Nazih Mechbal. They represent a collaborative effort from Laboratoire Procédés et Ingénierie en Mécanique et Matériaux – ENSAM/CNRS/CNAM, Paris, France; Aerospace Engineering Faculty, Delft University of Technology, Delft, The Netherlands; and Fraunhofer Institute for Manufacturing Technology and Advanced Materials (IFAM), Bremen, Germany.
Other notable presentations in this session include:
- “SHM System Architecture based on Ultrasonic Guided Waves for Aircraft Application Scenarios” by Daniel Schmidt from the German Aerospace Center (DLR) at 11:30 am.
- “SN-FSAT system for single sensor ultrasonic guided wave beam steering and damage detection” by Octavio A. Márquez Reyes from Johann Wolfgang Goethe-Universität at 11:50 am.
- “Structural Health Monitoring of Aerospace Structures using Guided Electromagnetic Waves in a Dielectric Waveguide at Ka-Band” by Manuel Enrico Rao from Goethe University Frankfurt am Main at 12:30 pm.
- “Effect of Cryogenic Temperatures on Guided Waves Structural Health Monitoring Using Acousto-Ultrasonic Piezocomposite Transducers on Composite Structures” by Shankar Galiana from the German Aerospace Center (DLR) at 12:50 pm.
Morpho’s participation in this prestigious workshop highlights its commitment to advancing SHM technologies and contributing to the safety and efficiency of aerospace structures. Attendees of EWSHM 2024 can look forward to an insightful presentation from Morpho, showcasing cutting-edge research and development in the field.
The event, which gathers top researchers and industry professionals from around the globe, will be held in Braunschweig, Germany.