Untitled

Brotherhood, CJ; Drinkwater, Bruce W.; Guild, FJ

doi:10.1023/a:1022584822730

Cited by 46 publications

(3 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1 corresponding to a perfectly bonded condition. The reflection coefficient R 12 and transmission coefficient T 12 of a normal incident ultrasonic wave from the imperfect interface are given by the following [5,10]: …”

Section: Theoretical Modelmentioning

confidence: 99%

“…Santos et al [8] evaluated defect dimensions in adhesively bonded lap joints based on the measurement of scattering effects of ultrasonic guided waves. Brotherhood et al [9,10] investigated the detectability of dry contact kissing bonds in adhesive joints using three ultrasonic inspection techniques. Biwa et al [11] reported that the values of normal and tangential interfacial stiffness of the contacting interfaces are functions of the frequency as well as the contact pressure.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Assessment of Adhesive Bond Strength Using the Ultrasonic Technique

Her

Lin

2014

The Journal of Adhesion

View full text Add to dashboard Cite

The ultrasonic technique is one of the most promising methods to nondestructively evaluate the interface. When the adhesive bonding is not perfect, part of ultrasonic energy is reflected from the interface. The reflection signal can be used to estimate the adhesive strength. In this investigation, a spectral analysis is employed using Fast Fourier Transform (FFT) to evaluate the reflection signal in frequency domain. The frequency spectrum of the reflection signal is then deconvolved with a reference signal taken from the bottom of the test block to determine the interfacial stiffness which can provide useful information on the nature of the adhesive interface. In this work, two aluminum blocks are adhesively bonded with the epoxy. The adhesive bond strength measured by a tensile testing is correlated with the interfacial stiffness. Experimental results show that the adhesive bond strength is linearly increasing with the increase in interfacial stiffness. It demonstrates that the adhesive bond strength can be characterized using the single parameter of interfacial stiffness. The present study reveals the feasibility of assessing the adhesive bond strength with the ultrasonic technique.

show abstract

Section: Theoretical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Assessment of Adhesive Bond Strength Using the Ultrasonic Technique

Her

Lin

2014

The Journal of Adhesion

View full text Add to dashboard Cite

show abstract

“…[10] Different techniques have been investigated such as ultrasonic techniques, [11][12][13][14] thermography, [15,16] digital image correlation, [17] dynamic response [18] etc. Results show the dependency on compressive loads for the detectability through ultrasonic techniques [19] and the potential of nonlinearity shown when "weak bonds" are illuminated with ultrasound. [20] Other authors have explored the potential of laser shock waves originally developed for coating to detect weak adhesive bonds of carbon fiber-reinforced polymers.…”

Section: Introductionmentioning

confidence: 99%

The use of acoustic emission and composite peel tests to detect weak adhesion in composite structures

Freitas

Zarouchas

Poulis

2018

The Journal of Adhesion

View full text Add to dashboard Cite

Adhesive bonding is one of the most promising joining technologies for composite aircraft. However, to comply with current aircraft certification rules, current safety-critical bonded joints, in which at least one of the interfaces requires additional surface preparation, are always used in combination with redundant mechanical fasteners, such as rivets and bolts. This lack of trust in bonded structures is mostly linked to the fear of lack of adhesion or a "weak bond".The aim of this paper is to tackle this challenge by assessing the ability to use composite peel tests and acoustic emission (AE) technique to assess adhesion quality and distinguish a good bond quality from a "weak bond".Composite Bell Peel (CBP) tests and Double-CantileverBeam (DCB) tests were performed on contaminated and noncontaminated CFRP bonded specimens. The results show that peel strength drops significantly at the location of the contaminated interface that has led to weak adhesion, as a result from adhesive failure. The AE signals obtained during DCB tests show different features for cracks growing at the interface ("weak bonds") and inside the adhesive layer (cohesive failure). In addition to this, scattering of the AE signals were observed in the contaminated specimens with "weak bonds". ARTICLE HISTORY

show abstract