10.14489/td.2018.12.pp.020-027

2018, 12 December

DOI: 10.14489/td.2018.12.pp.020-027

Chulkov A. O., Moskovchenko A. I., Vavilov V. P.
ACTIVE THERMAL TESTING OF CURVED PARTS MADE OF CARBON FIBER REINFORCED PLASTIC COMPOSITE BY USING VARIOUS TYPES OF THERMAL STIMULATION
(pp. 20-27)

Abstract. The paper describes results of optimization of thermal stimulation sources in active infrared thermographic nondestructive testing of a sample made of carbonfiber reinforce polymer (CFRP) and containing various types of artificial defects. The main difficulties in flaw detection and characterization of defects in CFRP are associated with the heterogeneous structure of this composite, while typical defects of composites are different from those in metals. They include delaminations, fiber breaks, porosity, a lack of adhesive, and others. Moreover, complicated shapes of many products, including multilayered structures, and the presence of ribs and reinforcing elements, also causes certain difficulties in nondestructive testing. In the test sample, some typical operational defects were simulated, namely, impact damage with the energy of 15 J, material thinning and composite vertical cracks. The sample contained some ribs and reinforcements also made of CFRP.Optimization of the test procedure was carried out by heating the sample by means of optical sources, namely, halogen lamps and Xenon flash lamps, as well as a magnetostrictive ultrasonic transducer and an induction converter. The choice of an optimal technique for thermal stimulation of particular parts requires taking into account a type of material, thickness and geometry of tested objects, and a type of potential defects, which, in their turn, are characterized by different mechanisms of temperature signal generation.

Keywords: сomposite, carbon fiber reinforced plastic composite, active infrared thermography, defect.

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A. O. Chulkov, A. I. Moskovchenko, V. P. Vavilov (National Research Tomsk Polytechnic University, Tomsk, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

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