Approximation of the laws of distribution information parametr for ndt composite materials
DOI:
https://doi.org/10.15587/1729-4061.2012.6005Keywords:
nondestructive testing, approximation of the laws of distribution, composite materialsAbstract
Acoustic impedance method is one of the most popular ways in non-destructive testing of compounds in multilayer structures. The method is based on difference of mechanical impedances in damaged and defect-free areas of controlled product.
The main informative parameter for most contemporary flaw detectors is the amplitude of the signal, received from the impedance sensor. Usually diagnostic decision making is based on threshold overrunning by chosen informative parameter. Threshold value can be calculated with the help of statistical methods that include information about the distribution law of informative parameters samples obtained from and defect-free areas.
For evaluating the possibility of choosing approach for the approximation of the laws of distribution of information parameter, we have done the experimental testing of composite samples with artificially marked defects. The sample had four defects, which had different size and tapes of damage. Tables 1 and 2 present the results of the research, and also present approximation equations and their approximations. The obtained equation can be used not only for specification of the threshold value but also to assess the probability of control for defects of various types and sizesReferences
- Ланге, Ю.В. Акустические низкочастотные методы и средства неразрушающего контроля многослойных конструкций [Текст] / Ю.В. Ланге. ― М.: Машиностроение, 1991 ― 272с.
- Кендалл, М. Теория распределений [Текст] / Кендалл М., Стюарт А.; пер. с англ. В. В. Сазонова, А. Н. Ширяева // под ред. А. Н. Колмогорова ― М.: Наука, 1966.- 588 с.
- Методика установления вида математической модели распределения погрешности: МИ 199-79 [Текст].// ― М.: Издательство стандартов, 1981 - 31 с.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2014 Севіля Русланівна Сунетчієва, Євгеній Федорович Суслов
This work is licensed under a Creative Commons Attribution 4.0 International License.
The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.
A license agreement is a document in which the author warrants that he/she owns all copyright for the work (manuscript, article, etc.).
The authors, signing the License Agreement with TECHNOLOGY CENTER PC, have all rights to the further use of their work, provided that they link to our edition in which the work was published.
According to the terms of the License Agreement, the Publisher TECHNOLOGY CENTER PC does not take away your copyrights and receives permission from the authors to use and dissemination of the publication through the world's scientific resources (own electronic resources, scientometric databases, repositories, libraries, etc.).
In the absence of a signed License Agreement or in the absence of this agreement of identifiers allowing to identify the identity of the author, the editors have no right to work with the manuscript.
It is important to remember that there is another type of agreement between authors and publishers – when copyright is transferred from the authors to the publisher. In this case, the authors lose ownership of their work and may not use it in any way.
