Capability of non-destructive techniques in evaluating damage to composite sandwich structures

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00010669%3A_____%2F19%3AN0000023" target="_blank" >RIV/00010669:_____/19:N0000023 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1108/IJSI-10-2018-0067" target="_blank" >https://doi.org/10.1108/IJSI-10-2018-0067</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1108/IJSI-10-2018-0067" target="_blank" >10.1108/IJSI-10-2018-0067</a>

Result language

angličtina

Original language name

Capability of non-destructive techniques in evaluating damage to composite sandwich structures

Original language description

Defects can be caused by a number of factors, such as maintenance damage, ground handling and foreign objects thrown up from runways during an in-service use of composite aerospace structures. Sandwich structures are capable of absorbing large amounts of energy under impact loads, resulting in high structural crashworthiness. This situation is one of the many reasons why sandwich structures are extensively used in many aerospace applications nowadays. Their non-destructive inspection is often more complex. Hence, the choice of a suitable non-destructive testing (NDT) method can play a key role in successful damage detection. The paper aims to discuss these issues. A comparison of detection capabilities of selected C-scan NDT methods applicable for inspections of sandwich structures was performed using water-squirt, air-coupled and pitch-catch (PC) ultrasonic techniques, supplemented by laser shearography (LS). Test results showed that the water-squirt and PC techniques are the most suitable methods for core damage evaluation. Meanwhile, the air-coupled method showed lower sensitivity for the detection of several artificial defects and impact damage in honeycomb sandwiches when unfocussed transducers were used. LS can detect most of the defects in the panels, but it has lower sensitivity and resolution for honeycomb core-type sandwiches. This study quantitatively compared the damage size indication capabilities of sandwich structures by using various NDT techniques. Results of the realised tests can be used for successful selection of a suitable NDT method. Combinations of the presented methods revealed most defects.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

INTERNATIONAL JOURNAL OF STRUCTURAL INTEGRITY

ISSN

1757-9864

e-ISSN

1757-9872

Volume of the periodical

10

Issue of the periodical within the volume

3

Country of publishing house

GB - UNITED KINGDOM

Number of pages

15

Pages from-to

356-370

UT code for WoS article

000476509400006

EID of the result in the Scopus database

2-s2.0-85067082050