10.14489/td.2017.10.pp.028-035

2017, 10 October

DOI: 10.14489/td.2017.10.pp.028-035

Murashov V. V., Yakovleva S. I.
APPLICATION OF THE ACOUSTIC FREE VIBRATION METHOD FOR CONTROL OF THE STRUCTURES CONTAINING LAYERS FROM NON-METALLIC MATERIALS
(pp. 28-35)

Abstract. The physical principles of the acoustic free vibration method, areas ofits application and control features of the products from layered plastics, multilayerglud constructions, and also constructions with heat-protective coverings arediscussed. It is shown that the efficiency of the method largely depends on the range of frequencies spectrum excited by the product during an impact. It is established that the main sign of defects bythe control method of free vibration is changes in the amplitude of the signal in a specified band of frequencies and the main resonance frequency of the pulse freely damped oscillations. It is shown that the depth of the defect can be determined by experimentally determined logarithmic level of the oscillation amplitude and the known logarithmic level of the amplitude of the plate in the area of the defect located at a known depth. Operational opportunities and constraints in the application of free vibration method in identifying defects such as delaminations, disbonds, porosity of material etc. were identified.Methodical questions ofcontrol oftheconstructions containing layers from non-metallic materials are in detailconsidered. It is indicated that for the control of parts and constructions by the acoustic free vibration method the sizes of the detected defects is smaller than true defects.

Keywords: layered plastics, multilayer constructions, heat-protective coverings, non-destructivetesting, acoustic methods, free vibration method.

+ - About the Authors Click to collapse

V. V. Murashov, S. I. Yakovleva (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. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

1. Kablov E. N. (2015). Innovation developments of FSUE «All-Russian Scientific Institute of Aviation Materials» of the State Research Center of the Russian Federation on implementation «Strategic directions of development of materials and processing technologies for the period up to 2030». Aviatsionnye materialy i tekhnologii, (1), pp. 3-33. doi: 10.18577/2071-9140-2015-0-1-3-33. [in Russian language]
2. Kablov E. N. (2008). Aerospace materials science. Vse materialy. Entsiklopedicheskii spravochnik, (3), pp. 2-14. [in Russian language]
3. Kablov E. N. (2001). The quality control of materials is a guarantee of the safe operation of aircraft. Aviatsionnye materialy i tekhnologii, (1), pp. 3-8. [in Russian language]
4. Murashov V. V. (2016). Testing and diagnostics of multilayer structures made of polymer composites by acoustic methods. Moscow: Izdatel'skii dom «Spektr». [in Russian language]
5. Murashov V. V., Generalov A. S. (2014). Testing multilayer laminated structures by low-frequency acoustic methods. Aviatsionnye materialy i tekhnologii, (2), pp. 59-67. doi: 10.18577/2071-9140-2014-0-2-59-67. [in Russian language]
6. Murashov V. V., Trifonova S. I. (2015). Quality inspection of polymeric composite materials with ultrasonic temporary technique of cycling method. Aviatsionnye materialy i tekhnologii, (4), pp. 86-90. doi: 10.18577/2071-9140-2015-0-4-86-90. [in Russian language]
7. Kablov E., Murashov V., Rumyantsev A. (2006). Diagnostics of polymer composites by acoustic methods. Ultragarsas. Kaunas: Tecnologija, (2), pp. 7-10.
8. Karabutov A. A., Murashov V. V., Podymova N. B., Oraevsky A. A. (1998). Nondestructive characterisation of layered composite materials with a laser optoacoustic sensor. Nondestructive Evaluation of Materials and Composites II (San Antonio, Texas, march-april 1998). San Antonio: Published by SPIE – The International Society for Optical Engineering, Vol. 3396, pp. 103-111.
9. Klyuev V. V. (Ed.), Ermolov I. N., Lange Iu. V. (2006). Nondestructive testing. Handbook. In 8 volumes. Vol. 3. Ultrasonic inspection. 2nd Ed. (revised and complemented). Moscow: Mashinostroenie. [in Russian language]
10. Lange Iu. V. (1991). Acoustic low frequency methods and means of nondestructive testing of multilayer structures. Moscow: Mashinostroenie. [in Russian language]
11. Murashov V. V. (2016). Quality control of products from polymeric composite materials by acoustic methods. Kontrol'. Diagnostika, (12), pp. 16-29. doi: 10.14489/td.2016.12.pp.016-029 [in Russian language]
12. Murashov V. V. (2012). Control of laminated structures by the acoustic free vibration method. Polymer Science. Ser. D. Glues and Sealing Materials, 5(4), pp. 341-345.
13. Skuchik E. (1971). Simple and complex oscillatory systems. Moscow: Mir. [in Russian language]
14. Kharkevich A. A. (1962). Spectra and analysis. Moscow: Fizmatgiz. [in Russian language]
15. Vainberg D. V. (1973). Handbook of Strength, Stability and Oscillations of the plates. Kiev: Budivel'nik.

+ - Purchase digital version of a single article Click to collapse

This article is available in electronic format (PDF).

The cost of a single article is 350 rubles. (including VAT 18%). After you place an order within a few days, you will receive following documents to your specified e-mail: account on payment and receipt to pay in the bank.

After depositing your payment on our bank account we send you file of the article by e-mail.

To order articles please fill out the form below: