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Damage Identification in Strongly Loaded Carbon-Reinforced Composite Using the Electric Resistance Change Procedure*

  • Jacek Gadomski and Paweł Pyrzanowski
Published/Copyright: May 28, 2013
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Abstract

Composite materials are often used as primary structures in important devices, like transport facilities. However, prediction of their work and damage propagation is not easy. Operating of the structure causes delaminations and fibers cracking which are difficult to detect by visual investigation. The paper presents an experiment in which an electrical resistance change method was used for investigating damage in strongly loaded carbon-fiber reinforced plastic composites, where the conducting carbon fiber was used as a sensor for defect detection. The method is shown by which the electric potential difference was measured at the carbon/epoxy composite beam type specimen exposed to the action of pure bending moment.

Kurzfassung

Kompositwerk stoffe werden häufig für Primärstrukturen in wichtigen Teilen verwendet, wie zum Beispiel Transporteinrichtungen. Eine Vorhersage ihres Service- und Schädigungsverhaltens ist jedoch nicht einfach. Die Verwendung solcher Strukturen verursacht Delaminationen und Faserrissbildung, die mittels visueller Inspektion schwer zu entdecken sind. Im vorliegenden Beitrag wird ein Versuch gezeigt, in dem das Widerstandsmessverfahren angewendet wurde, um die Schädigung in schwer belasteten kohlefaserverstärkten Kompositen zu untersuchen, in dem die Kohlefaser als Sensor für die Defektdetektion verwendet wurde. Es wird eine Methode vorgestellt, mit der die elektrische Potentialdifferenz eines balkenähnlichen Karbon/Epoxy-Komposit-Probekörpers unter einem reinen Biegemoment gemessen wurde.


*

Extended version of the contribution for the Symposium on Fatigue Failure and Fracture Mechanics

Jacek Gadomski, M.Sc. Eng., was born in 1962. He graduated at the Faculty of Power and Aeronautical Engineering of the Warsaw University of Technology. He worked as aircraft designer, among other things on the design of composite structures for gliders and light aircrafts. He is Assistant Professor at the Institute of Aeronautics and Applied Mechanics of the WUT.

Pawe? Pyrzanowski, Ph.D, D.Sc., was born in 1965. He graduated at the Faculty of Power and Aeronautical Engineering of the Warsaw University of Technology. He is Professor at the Institute of Aeronautics and Applied Mechanics of the WUT.


References

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Published Online: 2013-05-28
Published in Print: 2011-06-01

© 2011, Carl Hanser Verlag, München

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