Assessment of uncertainty in damage evaluation by ultrasonic testing of composite structures

2018 ◽  
Vol 203 ◽  
pp. 71-84 ◽  
Author(s):  
Angelika Wronkowicz ◽  
Krzysztof Dragan ◽  
Krzysztof Lis
Keyword(s):  
Ultrasonic Testing ◽  
Composite Structures ◽  
Damage Evaluation

scholarly journals Smart numerical tools for the modelling of ultrasonic testing on curved composite structures

2019 ◽  
Author(s):  
Alexandre Imperiale ◽  
Edouard Demaldent ◽  
Nicolas Leymarie ◽  
Sylvain Chatillon ◽  
Pierre Calmon
Keyword(s):  
Ultrasonic Testing ◽  
Composite Structures ◽  
Numerical Tools

scholarly journals Evaluation of Impact Damage in Composite Structures Using Ultrasonic Testing

2018 ◽  
Vol 2018 (10) ◽  
pp. 82-92 ◽  
Author(s):  
Angelika Wronkowicz-Katunin ◽  
Krzysztof Dragan
Keyword(s):  
Image Processing ◽  
Image Analysis ◽  
Impact Energy ◽  
Ultrasonic Testing ◽  
Composite Structures ◽  
Impact Damage ◽  
Visual Observation ◽  
Effective Evaluation ◽  
Wide Range ◽  
Variable Impact

Abstract Barely visible impact damage is one of the problems commonly occurring in composite elements during an aircraft operation. The authors described the mechanisms of impact damage formation and propagation in composite structures. The paper presents a performed analysis of an influence of impact parameters on the resulting damage, i.e. its detectability by means of visual observation as well as its extent determined based on ultrasonic tests results. The tests were conducted on the CFRP specimens with a wide range of impact damage cases obtained with combinations of variable impact energy and shapes of impactors. Additionally, an algorithm based on image processing and image analysis methods is proposed for the purpose of the effective evaluation of the ultrasonic data obtained.

scholarly journals Wide-area impact damage evaluation with sonic infrared imaging NDE in advanced composite structures

2014 ◽  
Author(s):  
X. Han ◽  
Justin M. Ar-Rasheed ◽  
D. Zhang ◽  
A. Lubowicki ◽  
L. Favro ◽  
...  
Keyword(s):  
Composite Structures ◽  
Infrared Imaging ◽  
Impact Damage ◽  
Wide Area ◽  
Damage Evaluation ◽  
Advanced Composite ◽  
Sonic Infrared

scholarly journals Impact Damage Evaluation in Composite Structures Based on Fusion of Results of Ultrasonic Testing and X-ray Computed Tomography

Sensors ◽  
2020 ◽  
Vol 20 (7) ◽  
pp. 1867 ◽  
Author(s):  
Andrzej Katunin ◽  
Angelika Wronkowicz-Katunin ◽  
Krzysztof Dragan
Keyword(s):  
Computed Tomography ◽  
Ultrasonic Testing ◽  
Composite Structures ◽  
Structural Damage ◽  
Impact Damage ◽  
Estimation Accuracy ◽  
Fracture Mechanisms ◽  
Internal Damage ◽  
X Ray ◽  
X Ray Computed

Barely visible impact damage (BVID) is one of the most dangerous types of structural damage in composites, since in most practical cases the application of advanced non-destructive testing (NDT) methods is required to detect and identify it. Due to its character of propagation, there are minor signs of structural damage on a surface, while the internal damage can be broad and complex both in the point of view of fracture mechanisms and resulting geometry of damage. The most common NDT method applied e.g., in aircraft inspections is ultrasonic testing (UT), which enables effective damage detection and localization in various environments. However, the results of such inspections are usually misestimated with respect to the true damage extent, and the quantitative analysis is biased by an error. In order to determine the estimation error a comparative analysis was performed on NDT results obtained for artificially damaged carbon fiber-reinforced composite structures using two UT methods and X-ray computed tomography (CT). The latter method was considered here as the reference one, since it gives the best spatial resolution and estimation accuracy of internal damage among the available NDT methods. Fusing the NDT results for a set of pre-damaged composite structures with various energy values of impact and various types of impactor tips applied for introducing damage, the evaluation of estimation accuracy of UT was possible. The performed analysis allowed for evaluation of relations between UT and X-ray CT NDT results and for proposal of a correcting factor for UT results for BVID in the analyzed composite structures.

Design and Development of Lifeboats - Damage Evaluation and Repair of Composite Structures

2006 ◽  
Vol 3-4 ◽  
pp. 3-8 ◽  
Author(s):  
R.M. Cripps
Keyword(s):  
Marine Environment ◽  
Structural Design ◽  
Composite Structures ◽  
Structural Strength ◽  
Sandwich Structures ◽  
Damage Evaluation ◽  
Composite Construction ◽  
Design And Development ◽  
Reinforced Plastic ◽  
History Of

The RNLI has been using composites for the construction of some of its lifeboats since the early 1970s and in the late 1980s a decision was taken to adopt a newer advanced form of composite construction with a view to saving overall structural weight whilst maintaining the requisite structural strength. This paper presents a broad discussion of the history of the use of composites in the RNLI, the structural design and development of lifeboats and the challenges currently faced in the identification of damage and repair methods for fibre-reinforced plastic sandwich structures, operating in the marine environment.

scholarly journals Damage evaluation based on ultrasonic testing of compos-ite aircraft elements and image analysis methods

2018 ◽  
Vol 204 ◽  
pp. 06003 ◽  
Author(s):  
Angelika Wronkowicz ◽  
Krzysztof Dragan
Keyword(s):  
Image Analysis ◽  
Ultrasonic Testing ◽  
Three Dimensional ◽  
Data Interpretation ◽  
Damage Evaluation ◽  
Destructive Testing ◽  
Human Errors ◽  
Geometrical Properties ◽  
Evaluation Procedures ◽  
Analysis Methods

Composite aircraft elements are inspected with the use of non-destructive testing methods to detect the damage appearance and monitor its progression. Ultrasonic testing is one of the most commonly applied methods owing to its capabilities of detecting various types of internal flaws and dam-age as well as evaluating their location and geometrical properties. There are several di culties in analysing the ultrasonic data, which cover the high time-consumption of such analyses resulting from large sizes of the scans and a man-ual handling of them. Thus, due to the possible occurrence of human errors, there is a necessity of increasing the e ciency of these inspections by aiding the analysis of the ultrasonic data. The paper presents proposed methods of the application of image analysis methods for supporting the procedures of the ul-trasonic evaluation of the aircraft structures. These cover facilitating the steps of damage detection, quantification as well as a three dimensional reconstruc-tion and visualisation. The proposed approaches are computationally e cient and may facilitate the data interpretation and damage evaluation procedures.

scholarly journals Advanced ultrasonic testing of complex shaped composite structures

2016 ◽  
Vol 135 ◽  
pp. 012010 ◽  
Author(s):  
D Dolmatov ◽  
V Zhvyrblya ◽  
G Filippov ◽  
Y Salchak ◽  
E Sedanova
Keyword(s):  
Ultrasonic Testing ◽  
Composite Structures
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