Location

La Jolla, CA

Start Date

1-1-1993 12:00 AM

Description

It is known that failure of adhesive joints can occur either in the bulk region of an adhesive layer (cohesive mode) or along an interface between the adhesive and an adherent (interfacial or adhesion mode). Properly manufactured adhesive joints fail in the cohesive mode, while after environmental degradation the failure mode becomes predominantly interfacial. Therefore we conclude that humid environments affect mostly the interfacial region of a joint. This indicates the importance of non-destructive assessment of interface properties. While methods of cohesive property evaluation have progressed significantly, much more effort is required to develop interface evaluation methods. A development of this type is undertaken in this work.

Book Title

Review of Progress in Quantitative Nondestructive Evaluation

Volume

12B

Chapter

Chapter 5: Engineered Materials

Section

Bonded Joints

Pages

1523-1530

DOI

10.1007/978-1-4615-2848-7_194

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Ultrasonic Evaluation of Interfacial Properties in Adhesive Joints: Evaluation of Environmental Degradation

La Jolla, CA

It is known that failure of adhesive joints can occur either in the bulk region of an adhesive layer (cohesive mode) or along an interface between the adhesive and an adherent (interfacial or adhesion mode). Properly manufactured adhesive joints fail in the cohesive mode, while after environmental degradation the failure mode becomes predominantly interfacial. Therefore we conclude that humid environments affect mostly the interfacial region of a joint. This indicates the importance of non-destructive assessment of interface properties. While methods of cohesive property evaluation have progressed significantly, much more effort is required to develop interface evaluation methods. A development of this type is undertaken in this work.