Ultrasonic Non-Destructive Testing of Fibre Reinforced Composites

10.26686/wgtn.16999939 ◽

2021 ◽

Author(s):

◽

Matthew Thomson

Keyword(s):

Experimental Work ◽

Rayleigh Waves ◽

Ultrasonic Waves ◽

Reinforced Composites ◽

Surface Cracks ◽

Non Destructive Testing ◽

Destructive Testing ◽

Reinforced Composite ◽

Non Destructive ◽

Fibre Reinforced Composites

<p>This thesis focuses on the application of high frequency ultrasound as a tool for performing non-destructive testing for pultruded fibre reinforced composite (FRC) rods. These composite rods are popular in the manufacturing, construction and electrical industries due to their chemical, electrical and strength properties. Such FRCs are manufactured on automated production lines that operate day and night. Non-destructive testing techniques are desired to quickly and accurately detectmanufacturing flaws such as coating thickness irregularities and surface cracks. Layers and cracks can present as large changes in acoustic impedance and will strongly reflect ultrasonic waves. Combined with their low cost, east of use and absense of potentially harmful radiation, ultrasound has proven popular worldwide for Non-Destructive Testing. Finite Element Analysis (FEA) was employed to investigate the propagation of ultrasonic waves through layers of material to simulate a thickness measurement and the ability of ultrasound to measure thicknesses was proven. Experimental work was conducted on two fibre reinforced composite samples with varying thickness coatings of plastic and paint. The thickness was measured accurately using immersion transducers at 50MHz and a resolution of 20μm was attained through the use of matched filtering techniques. Surface acoustic waves, particularly Rayleigh waves were investigated using FEA techniques so that the generation, scattering and detection of such waves was understood. This lead to the development of methods for detecting surface cracks in glass using Rayleigh waves and these methods were successfully used in experimental work. Wave propagation in fibre reinforced composites was modelled and experimentally investigated with the results confirming theoretical expectations. Finally a Rayleigh wave was launched onto a fibre reinforced composite sample however the amount of energy leakage into the water was so great, due to the acoustic impedance of water, the detection of the wave was prevented. The conclusion reached was that an immersion setup was not appropriate for launching a travelling Rayleigh wave.</p>

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Non-destructive testing of wind turbines using ultrasonic waves

Non-Destructive Testing and Condition Monitoring Techniques for Renewable Energy Industrial Assets ◽

10.1016/b978-0-08-101094-5.00006-x ◽

2020 ◽

pp. 91-101

Author(s):

Fausto Pedro García Márquez ◽

Alfredo Arcos Jimenez ◽

Carlos Quiterio Gómez Muñoz

Keyword(s):

Wind Turbines ◽

Ultrasonic Waves ◽

Non Destructive Testing ◽

Destructive Testing ◽

Non Destructive

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Defect Types and Ultrasonic Nondestructive Testing for Fiber-Reinforced Composites

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.834-836.233 ◽

2013 ◽

Vol 834-836 ◽

pp. 233-236

Author(s):

Lin Dong Liu ◽

Xiao Qing Wu

Keyword(s):

Failure Modes ◽

Fiber Reinforced Composites ◽

Fracture Mechanisms ◽

Reinforced Composites ◽

Non Destructive Testing ◽

Fiber Reinforced ◽

Destructive Testing ◽

The Common ◽

Non Destructive ◽

Ultrasonic Ndt

In this paper, an attempt is made to introduce the defect types relevant to ultrasonic non-destructive testing, and then, we explain how these defects generate in fiber-reinforced composites. The common failure modes which occur are described and discussed. The significance of each of the fracture mechanisms, in terms of their effects on the residual load-bearing properties, is considered. The second part describes briefly the main relevant ultrasonic NDT methods used to identify these defects and indicates the sensitivity to the different types of defect.

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Detection of surface cracks in fibre reinforced composites using ultrasonic Rayleigh waves

2011 Fifth International Conference on Sensing Technology ◽

10.1109/icsenst.2011.6137019 ◽

2011 ◽

Cited By ~ 1

Author(s):

Matthew Thomson ◽

Gideon Gouws ◽

Paul Harris

Keyword(s):

Rayleigh Waves ◽

Reinforced Composites ◽

Surface Cracks ◽

Fibre Reinforced Composites

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LASER GENERATED ULTRASONIC WAVES FOR NON DESTRUCTIVE TESTING OF COMPOSITE MATERIALS

Non-destructive Testing '92 ◽

10.1016/b978-0-444-89791-6.50106-2 ◽

1992 ◽

pp. 500-504

Author(s):

F. GUILLOIS ◽

C. CORBEL ◽

D. DAVID ◽

H. TRETOUT ◽

R. DE MOL ◽

...

Keyword(s):

Composite Materials ◽

Ultrasonic Waves ◽

Non Destructive Testing ◽

Destructive Testing ◽

Non Destructive

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Ультразвуковой контроль дефектов металлических изделий сложной формы

Дефектоскопия ◽

10.31857/s0130308221050043 ◽

2021 ◽

pp. 31-36

Author(s):

В.В. Ларионов ◽

А.М. Лидер ◽

Д.О. Долматов ◽

Д.А. Седнев

Keyword(s):

Test Object ◽

Degrees Of Freedom ◽

Surface Profile ◽

Ultrasonic Waves ◽

Non Destructive Testing ◽

Destructive Testing ◽

Six Degrees Of Freedom ◽

Wide Range ◽

Manufactured Products ◽

Non Destructive

Nowadays, automation is an actual issue in the development of methods and equipment for ultrasonic non-destructive testing. The conditions of modern industrial production require the development and application the automated testing equipment which is versatile to a wide range of manufactured products, which can have a complex shape. In this paper, we propose a technique for ultrasonic testing of complex-shaped objects. Such technique implies the application of six degrees of freedom robotic manipulators to ensure the required refraction angle of ultrasonic waves into the test object at each measuring position. The trajectory of the robot movement during scanning is provided by restoring the surface profile of the test object using optical profilometry and determining the location of the test object relative to the robotic manipulator using a probe tip. Within the framework of this work, the effectiveness of the developed technology is verified experimentally.

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OS6-11 Experimental Observation of Harmonic Generation in Rayleigh Waves Using a Laser Doppler Vibrometer(Ultrasonic NDT of Cracks and Damages (2),OS6 Ultrasonic non-destructive testing and evaluation,MEASUREMENT METHODS)

The Abstracts of ATEM International Conference on Advanced Technology in Experimental Mechanics Asian Conference on Experimental Mechanics ◽

10.1299/jsmeatem.2015.14.82 ◽

2015 ◽

Vol 2015.14 (0) ◽

pp. 82

Author(s):

Naoki Matsuda ◽

Shiro Biwa

Keyword(s):

Harmonic Generation ◽

Rayleigh Waves ◽

Laser Doppler Vibrometer ◽

Measurement Methods ◽

Non Destructive Testing ◽

Destructive Testing ◽

Evaluation Measurement ◽

Non Destructive ◽

Ultrasonic Ndt ◽

Testing And Evaluation

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THE ANALYSIS OF METHODOLOGIES FOR TESTING COMPRESSIVE STRENGTH IN MASONRY MORTAR JOINTS / MŪRO SKIEDINIO GULSČIOJOJE SIŪLĖJE GNIUŽDOMOJO STIPRIO TYRIMŲ METODŲ ANALIZĖ

Mokslas - Lietuvos ateitis ◽

10.3846/mla.2014.694 ◽

2014 ◽

Vol 6 (5) ◽

pp. 514-519 ◽

Cited By ~ 2

Author(s):

Tomas Šlivinskas

Keyword(s):

Compressive Strength ◽

Mechanical Characteristics ◽

Ultrasonic Waves ◽

Non Destructive Testing ◽

Testing Methods ◽

Destructive Testing ◽

Advantages And Disadvantages ◽

Mortar Strength ◽

Non Destructive ◽

Masonry Mortar

The article analyzes masonry as composite material and presents the factors that affect the mechanical characteristics of masonry. The article also deals with the most frequently used destructive and non-destructive testing methods for the compressive strength of masonry mortar as well as related advantages and disadvantages. Moreover, the analysis of methods for testing ultrasonic waves has been carried out. The article reveals that for using the methodology of testing a mortar bonded wafer, the compressive strength correlation of masonry mortar is set between the ascertainment of masonry mortar strength using a regular mortar testing methodology (LST EN 1015-11:2004) and the compressive strength of mortar possibly taken from masonry joints. The obtained results of an experimental study on the samples have demonstrated that the strength reduction ratio of masonry mortar depends on the compressive strength of mortar. The value of the ratio is increasing with the descending compressive strength of mortar. Šiame straipsnyje nagrinėjamas mūras kaip kompozitinė medžiaga. Apžvelgiami veiksniai, veikiantys mechanines mūro charakteristikas. Išnagrinėti dažniausiai taikomi mūro skiedinio gniuždomojo stiprio tyrimų metodai, pateikti metodų privalumai ir trūkumai. Straipsnyje, taikant klijuotų skiedinio plokštelių bandymo metodiką, nustatyta mūro skiedinio gniuždomojo stiprio priklausomybė tarp mūro skiedinio stiprio nustatymo pagal įprastinę skiedinio bandymo metodiką ir skiedinio, tikėtina, paimto iš mūro siūlės, gniuždomojo stiprio.

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