The Visual Method in Quality Assessment of Single-Lap Adhesive Joints

Rudawska, Anna; Stančeková, Dana; Brzęczek, Józef

doi:10.12913/22998624/64066

Cited by 6 publications

(3 citation statements)

References 26 publications

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“…The analysis of the nature of the damage was conducted with three methods: a visual inspection [13,14], with an optical microscope [15,16] and with often used [17,18] electron microscope. The visual analysis made with the naked eye, due to a small thickness of the adhesive joint and low contrast with a metal or transparency of certain adhesives is, in a number of cases, hampered and does not prove certain as for the nature of the damage (Fig.…”

Section: Methodsmentioning

confidence: 99%

The Possibility of a Visual Analysis of the Failure of Butt Adhesive Joints Made with Different Glues

Komorek

Grygiel

Bieńczak

et al. 2018

Advances in Materials Science

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The results of conducted by the authors of the article numerical analyzes, indicate the importance of normal stresses, perpendicular to the adhesive joint, during the impact destruction of block adhesive samples. This kind of stresses are responsible for the occurrence of tearing or chipping in a joint. The very significant influence of adhesion in the impact-bonded adhesive joint was the reason for testing this parameter in joints made with adhesives with different Young’s modulus. It was assumed that adhesives differing in stiffness will have different adhesive properties, which should affect the impact strength of the adhesive joints. It was also assumed that the adhesion in the joint can be assessed by analyzing the surfaces of joint damage. Cylindrical butt joints connected with various adhesives were used to carry out the tests, in which they were loaded on tear-off. The nature of tested joints damage was usually cohesive or cohesive-adhesive. The assessment of the nature of joint damage allowed to determine whether they were the result of the loss of cohesion by the adhesive (cohesive damage) or the effect of poor adhesion between the hardened joint and adherends (adhesive damage). The assessment of the nature of the destruction was carried out by three methods: visual, using an optical microscope and using an electron microscope. As a result of the carried out observations, it was found that the visual method is the least useful and not very reliable, especially in the case of transparent or low-contrast in relation to the glued material joints. The use of electron microscope allows to obtain the most reliable results, however, the possible magnification is too large and the assessment of the entire weld fracture is difficult because it does not fit in the field of observation. Observations conducted using optical microscopy at a slight magnification (5-10 times), in most cases allow to determine the nature of the destruction to a satisfactory degree, with limitations such as in the visual method.

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Section: Methodsmentioning

confidence: 99%

The Possibility of a Visual Analysis of the Failure of Butt Adhesive Joints Made with Different Glues

Komorek

Grygiel

Bieńczak

et al. 2018

Advances in Materials Science

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“…In contrast to destructive methods for evaluating adhesive joints, non-destructive techniques are utilized. Non-destructive methods used for the estimation of adhesive joints include—first of all—such methods as visual [ 21 ], ultrasonic [ 22 , 23 ], acoustic emission [ 24 ] and thermographic [ 25 ], as well as terahertz [ 26 ] and synchrotron X-ray technology which are also widely used in non-destructive testing [ 27 ]. Among these methods, ultrasound, which is based on the phenomenon of the reflection and refraction of waves with frequencies above 16 kHz, is often used.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Adhesive Joints Using Ultrasonic Rayleigh Waves

Kowalczyk,

Ulbrich

2024

Materials

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Adhesive joints are non-separable connections that are used in numerous ways in vehicle construction, particularly in buses. The widespread use of adhesive joints makes it necessary to assess their quality, especially under production conditions. The main goal of this study was to develop a mathematical model to estimate the width of the adhesive path in a plywood-adhesive-closed-profile joint based on selected parameters of the ultrasonic surface wave. A digital ultrasonic flaw detector and Rayleigh wave probes were applied. The test involved evaluating different widths of hybrid adhesive and two-component epoxy adhesive. The tests were conducted on a steel profile from a bus construction. The attenuation of the ultrasonic waves on the steel profile (0.026 db/mm) and the adhesive (0.264 dB/mm) was determined. A one-size-fits-all model for estimating adhesive path width for specific conditions is proposed.

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“…Obtaining the right adhesive joint requires consideration of material, technological, constructional and related factors with joining operation [11,12]. The strength of adhesive joints depends on the properties of the adhesive, the type of materials to be joined, the dimensions of the adhesive joint, type and load value, curing time and loading, temperature, mechanical properties of the adhesive and physical properties of the adhreneds [13][14][15][16][17]. The surface treatment process of galvanized steel sheets usually includes degreasing, etching, rinsing and drying operations.…”

Section: Introductionmentioning

confidence: 99%

Influence of surface treatment on the strength of adhesive joints

Doluk¹,

Rudawska²,

Stančeková³

et al. 2021

Manufacturing Technology

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The article compared the strength results of the single-lap adhesive joints made of galvanized steel sheet. The shear strength of the adhesive joints was determined for two methods of surface treatment -using a degreaser (method B) and without a degreaser (method A). A twocomponent epoxy adhesive based on Bisphenol A was used for joining. The shear strength tests were carried out on a Zwick/Roell Z150 testing machine. The analysis of the surface roughness parameters of the samples for the method A was performed. The highest shear strength value (8.82 MPa) was obtained by method B and using P120 abrasive paper. The lowest shear strength value (4.08 MPa) was received using method A and P600 abrasive paper. The maximum values of measured surface roughness parameters were recorded for samples prepared with abrasive papers with granulations, respectively: P120, P220 and P180. The lowest values of Ra, Rz and Rt parameters gained using P600 abrasive paper.

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The Visual Method in Quality Assessment of Single-Lap Adhesive Joints

Cited by 6 publications

References 26 publications

The Possibility of a Visual Analysis of the Failure of Butt Adhesive Joints Made with Different Glues

The Possibility of a Visual Analysis of the Failure of Butt Adhesive Joints Made with Different Glues

Evaluation of Adhesive Joints Using Ultrasonic Rayleigh Waves

Influence of surface treatment on the strength of adhesive joints

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