DOI: 10.14489/td.2019.12.pp.016-022
Murashov V. V., Yakovleva S. I. RESEARCH AND IMPROVEMENT OF NONCONTACTING TECHNIQUE OF THE ULTRASONIC THROUGH TRANSMISSION METHOD OF NON-DESTRUCTIVE TESTING (pp. 16-22)
Abstract. Operation capabilities of ultrasonic through transmission method of non-destructive testing of products from polymeric composite materials and multilayer glued structures are considered. It is shown that for detection of defects in products from easily damaged materials, from the hydroscopic materials which are not allowing wetting by liquids, in designs with rough surface, and also for detection of the under surface defects which are not revealed by contact methods, effective use of ultrasonic through transmission noncontacting method. The calculation procedure and designing of ultrasonic through transmission noncontacting probes on the frequency of 200 kHz, allowing to reveal defects in products from polymeric composite materials and in multilayer glued structures with higher sensitivity, than noncontact ultrasonic probes applied now on frequencies 20, 40 and 80 kHz is offered. The constructive scheme of the vibrator with two piezoelectric plates from ceramics TsTS-19, included inphase, with the metal lap playing role of wave guide, and matching layer from foam plastic is provided. It is specified that two piezoelectric plates works in “short circuit” mode therefore sound pressure piezoelectric plates increases by acoustic line twice, and oscillation strength four times.
Keywords: non-destructive testing, ultrasonic through transmission method, noncontacting technique, polymer composite materials (PCM), multilayer structures.
V. V. Murashov, S. I. Yakovleva (FSUE “VIAM” SSC of the Russian Federation, Moscow, Russia) E-mail:
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