10.14489/td.2018.07.pp.020-029

2018, 07 July

DOI: 10.14489/td.2018.07.pp.020-029

Murashov V. V.
METHODOLOGY OF RESEARCH OF PHYSICAL AND MECHANICAL PROPERTIES AND STRUCTURE OF POLYMERIC COMPOSITE MATERIALS BY METHODS OF TECHNICAL DIAGNOSTICS. Part 2
(pp. 20-29)

Abstract. Physical the bases of ultrasonic methods of reflection and through transmission, polymeric composite materials (PCM) applied to diagnostics are covered. It is offered to evaluate extent of accumulation of microdamages to PCM according to their strength characteristics determined by nondestructive method on complex parameter, including values of velocity of propagation of pulse of ultrasonic oscillations (USO) in the plane of product and frequency rate of the main spectrum component of impulse of USO which has passed product on thickness in the direct and return directions. It is specified that for diagnostics of materials it is advisable to excite a longitudinal wave and the wave similar to symmetric wave of zero order in product. Expressions for definition on the measured speeds of longitudinal and transverse waves of modules the Ship's boy are given, modules of shift, Puasson's factors in any direction and the expressions describing anisotropy of strength properties are offered. Possibilities of laser and acoustic way of ultrasonic control are shown at PCM diagnostics, schemes of optiko-acoustic probes for implementation of broadband acoustic spectroscopy are provided and experimentally certain precision characteristics of the PCM physical and mechanical properties are defined. The new way of calculation of criterion of SWF is provided at PCM diagnostics by acoustic-ultrasonic method.

Keywords: polymer composite materials (PCM), acoustic characteristics of materials, ultrasonic longitudinal waves, lamb waves, the informative parameters of the diagnostic.

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V. V. Murashov (FSUE “VIAM” SSC of the Russian Federation, Moscow, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

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