Mechanical Wave Interaction at a Diffuse Interface

Sinclair, A. N.; Graf, M.; Allen, Aimee

doi:10.1080/09349848909409464

Cited by 3 publications

References 5 publications

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Bond Strength Evaluation in Dissimilar Materials

Ojard

Rehbein

Buck

et al. 1991

Review of Progress in Quantitative Nondestructive Evaluation

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Diffusion bonding is a useful joining technique that allows similar and dissimilar materials to be bonded together in near net shape. Although modelling of the diffusion bonding process has been done to predict the bonding parameters needed to achieve parent metal mechanical properties (1,2), the possibility still exists that defects will be present in the bonded plane. There are three classes of defects that can be formed, with voids being the most common and heavily studied ones (3-8). Contamination of the bond line is a serious defect and the effect on NDE interrogation has been discussed previously by the authors (8) and others (3). A "kissing bond" is another type of defect which is difficult to detect and is the focus of this paper. It is the purpose of this work to find an NDE technique that can evaluate the bond strength uniquely, regardless of the class of defect, without any information about the bonding conditions. BACKGROUND

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Bond Strength Evaluation in Dissimilar Materials

Ojard

Rehbein

Buck

et al. 1991

Review of Progress in Quantitative Nondestructive Evaluation

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Detection limits for single small flaws and groups of flaws when using focussed ultrasonic transducers

Shiloh¹,

Bond

Som

1993

Ultrasonics

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Acoustic Resonance Methods for Measuring Dynamic Elastic Modulus of Adhesive Bonds

Sinclair

Dickstein

Spelt

et al. 1990

Dynamic Elastic Modulus Measurements in Materials

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An investigation is made into acoustic resonance methods for measuring the dynamic elastic modulus of the adhesive layer in a bonded metal-to-metal joint. Empirical studies have indicated that this parameter may be used to infer the cohesive strength of the bond; in theory, an accurate measurement of two or more resonant frequencies should give both the elastic modulus and thickness of the adhesive layer. Verifying the accuracy of the technique was greatly hampered by the strong dependence of elastic properties in the adhesive on the test frequency. The resonant frequencies of aluminum-to-aluminum adhesive joints were determined by both contact and immersion acoustic resonance techniques; receptance analysis was then used to determine the elastic modulus. Results were consistent with those achieved by time-of-flight measurements on bulk adhesive specimens. Based on these tests, inherent limitations of the Fokker Mark II Bondtester for assessing the cohesive strength of a bond were explored.

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Mechanical Wave Interaction at a Diffuse Interface

Cited by 3 publications

References 5 publications

Bond Strength Evaluation in Dissimilar Materials

Bond Strength Evaluation in Dissimilar Materials

Detection limits for single small flaws and groups of flaws when using focussed ultrasonic transducers

Acoustic Resonance Methods for Measuring Dynamic Elastic Modulus of Adhesive Bonds

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