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Localizing impact damage of composite structures with modified RAPID algorithm and non-circular PZT arrays

Dziendzikowski M., Dragan K., Katunin A.

Archives of Civil and Mechanical Engineering

2017

Vol. 17, no. 1

178--187

Detecting and localizing impact damage of composite structures is one of the key expectations towards development of structural health monitoring (SHM) systems. In this paper, a method intended to meet these requirements is presented. The developed method is based on guided waves actuation in a monitored structure. One of the methods used for damage localization with guided waves is the RAPID/PRA algorithm. This algorithm is mostly used for circular arrays of PZT piezoelectric transducers. In the paper a modification of this approach, adopted to be used for more general geometries of PZT networks is presented. Its main improvement is that predicted location of damage is less biased by inhomogeneous distributions of sensing paths, i.e. lines connecting pairs of transducers of a network, than for RAPID algorithm. The developed method was verified experimentally on composite laminated specimens with introduced damage caused by low energy impact. Detailed description of the developed algorithm as well as the results of impact damage localization tests are delivered in the paper.

Composite Aerospace Structure Monitoring with use of Integrated Sensors

Dragan K., Dziendzikowski M., Kurnyta A., Salacinski M., Klysz S., Leski A.

Fatigue of Aircraft Structures

2015

Iss. 7

12--17

One major challenge confronting the aerospace industry today is to develop a reliable and universal Structural Health Monitoring (SHM) system allowing for direct aircraft inspections and maintenance costs reduction. SHM based on guided Lamb waves is an approach capable of addressing this issue and satisfying all the associated requirements. This paper presents an approach to monitoring damage growth in composite aerospace structures and early damage detection. The main component of the system is a piezoelectric transducers (PZT) network integrated with composites. This work describes sensors’ integration with the structure. In particular, some issues concerning the mathematical algorithms giving information about damage from the impact damage presence and its growth are discussed.

An Approach to Structural Health Monitoring of Composite Structures Based on Embedded PZT Transducers

Dziendzikowski M., Dragan K., Kurnyta A., Kornas Ł., Latoszek A., Zabłocka M., Kłysz S., Leski A., Chalimoniuk M., Giewoń J.

Fatigue of Aircraft Structures

2014

Iss. 6

113--118

One approach to developing a system of continues automated monitoring of structural health is to use elastic waves excited in a given medium by a piezoelectric transducers network. Depending on their source and the geometry of the structure under consideration elastic waves can propagate over a significant distance. They are also sensitive to local structure discontinuities and deformations providing a tool for detecting local damage in large aerospace structures. This paper investigates the issue of Barely Visible Impact Damages (BVIDs) detection in composite materials. The model description and the results of impact tests verifying damage detection capabilities of the proposed signal characteristics are presented in the paper.