Ultrasonic characterization of andesite waste-reinforced composites

Oral, İmran; Soydal, Ülkü; Bentahar, Mourad

doi:10.1007/s00289-016-1811-3

Cited by 7 publications

(12 citation statements)

References 49 publications

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“…Some previous works reported that the Poisson's ratio is inversely proportional to Young's and shear moduli. [26,27] In view of the above and according to results obtained in this study, the decrease in Young's and shear moduli of GER/DSF-AT sample can be explained by the increase of Poisson's ratio.…”

Section: Discussionsupporting

confidence: 60%

“…Many studies in the related literature focused on using ultrasound to assess the elastic properties of isotropic composites. [25,26,44,51] These studies revealed that the improvement in the elastic properties is attributed to strong (covalent bonds) and weak (van der Waals forces and hydrogen bonds) electrostatic gravitational forces that keep the molecular chains close to each other, resulting in an increase of the internal forces between them. This means that elastic moduli are very sensitive to intermolecular interactions.…”

Section: Discussionmentioning

confidence: 99%

“…[23,24] Nondestructive testing (NDT) by ultrasound can be used for the determination of different elastic properties (Young's modulus, bulk modulus, shear modulus, longitudinal modulus, acoustic impedance, Poisson's ratio, etc.). In the literature, some studies have focused on the ultrasonic characterization of epoxy matrix composites loaded with particulate reinforcements or powders such as biochar, [25] andesite waste, [26] polyethylene terephthalate carbon powder, [27] and olive stone flour. [28] Different biocomposites were successfully prepared in recent studies with various amounts of DSF fillers from 0 to 50 wt% with interval of 10 wt%.…”

Section: Introductionmentioning

confidence: 99%

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Green epoxy resin/date stone flour biocomposites: Effect of filler chemical treatments on elastic properties

et al. 2021

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This work aims to study the effect of chemical treatments of date stone flour (DSF) as a filler on the elastic properties of biocomposites based on green epoxy resin (GER) used as a matrix. The main disadvantages of natural reinforcements in biocomposites are the poor compatibility between the reinforcement and the matrix as well as the relatively high moisture sorption. Different chemical treatments using soda (alkaline), benzoyl chloride, and potassium permanganate were applied to the DSF filler. Then, the filler was incorporated into the matrix at 30 wt % to obtain GER/DSF biocomposites. The elastic properties of the biocomposites, namely, longitudinal modulus, shear modulus, bulk modulus, Young's modulus of elasticity, acoustic impedance, Poisson's ratio, and ultrasonic microhardness, were determined using ultrasonic through-transmission method. In addition, the morphology was studied using microscopy analysis. The results obtained revealed a decrease of the elastic properties of the pretreated-filler biocomposite compared to the pure GER. On the other hand, the chemical treatment of the filler leads to an improvement of the elastic properties of GER/DSF biocomposites. The permanganate treatment is the most suitable for GER/DSF biocomposites. The morphology analysis through optical microscopy and scanning electron microscopy showed that chemical treatments enhance the interfacial adhesion between the DSF filler and the GER matrix.

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Section: Discussionsupporting

confidence: 60%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Green epoxy resin/date stone flour biocomposites: Effect of filler chemical treatments on elastic properties

et al. 2021

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“…The ultrasonic testing (UT) method is used as one of the most popular NDT methods for many years. UT method is proven as an economical and sensitive way in materials testing compared with traditional DT methods 36–40 . For determination of elastic constants (Young's modulus, Bulk Modulus, Poisson's ratio, Longitudinal Modulus, and Shear Modulus), acoustic impedance, ultrasonic micro‐hardness and grain size, and so forth the quantities should be measured in UT are only ultrasonic wave velocity values (longitudinal wave velocity and shear wave velocity), and attenuation coefficient 38 .…”

Section: Introductionmentioning

confidence: 99%

Preparation and ultrasonic characterization of modified epoxy resin/coconut shell powder biocomposites

Oral

Kocaman

Ahmetli

2021

J of Applied Polymer Sci

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A new bio‐based epoxy resin (BER) is produced by the esterification reaction between sebacic acid (SAc) as bio‐based acid and epichlorohydrin (ECH). The epoxy resin (ER) is modified with the BER. The biocomposites are prepared using untreated coconut shell powder (CSP), modified coconut shell powder (MCSP), and MER. The CSP and MCSP particles are mixed with MER in varied compositions (10–50 wt%) for preparation of the MER/CSP and MER/MCSP biocomposites. The influences of CSP and MCSP bio‐fillers amounts on the physical properties (density, elastic constants, acoustic impedance, ultrasonic micro‐hardness, and attenuation coefficient) of biocomposites are investigated using the ultrasonic pulse‐echo overlap method (PEOM). It was seen that the densities, both ultrasonic longitudinal and shear waves' velocity values of obtained biocomposites were higher than those of the MER. All elastic moduli of the MER/MCSP biocomposites have higher values than of the neat MER and MER/CSP biocomposites.

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“…Otherwise, these errors can cause very big accidents, which may cause the loss of very important Ultrasonic testing (UT) has been proven as one of the best non-destructive testing methods for materials [8,14,15]. Traditional UT techniques are carried out to investigating metals, fiberreinforced composites, polymers, and many different materials [7,9,14,16,17]. However, most of the conventional ultrasonic techniques use couplings such as water, glycerin, honey, etc.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Surface Damages in Composite Materials Using Ultrasonic Lamb Waves

Oral¹

2021

El-Cezeri Fen Ve Mühendislik Dergisi

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In this research, it was aimed to figure out the damages in composite materials using the air-coupled ultrasonic method. The ultrasonic lamb waves were used to obtain C-scan images of damaged materials. A couple of planar air-coupled transducers (500 kHz-Ultran Group-USA), and an air-coupled scanning system (MISTRAS-EPA, France) were used for obtaining the data from the surfaces of materials used in this research. These transducers were located at different incidence angles for obtaining the lamb waves. The data obtained as A-scan signals was saved in txt data. This data was processed with the MATLAB codes for drawing C-scan images of the surfaces of materials. The results obtained from this research showed that the surface damages in composite materials can be characterized by using ultrasonic lamb waves.

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Ultrasonic characterization of andesite waste-reinforced composites

Cited by 7 publications

References 49 publications

Green epoxy resin/date stone flour biocomposites: Effect of filler chemical treatments on elastic properties

Green epoxy resin/date stone flour biocomposites: Effect of filler chemical treatments on elastic properties

Preparation and ultrasonic characterization of modified epoxy resin/coconut shell powder biocomposites

Investigation of Surface Damages in Composite Materials Using Ultrasonic Lamb Waves

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