Higher Order Nonlinearity Measurement Techniques in Thin Adhesive Layer

Thumbnail Image
Date
1991
Authors
McGowan, Paul
Adler, Laszlo
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Research Projects
Organizational Units
Journal Issue
Is Version Of
Versions
Series
Series
Review of Progress in Quantitative Nondestructive Evaluation
Center for Nondestructive Evaluation

Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.

This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.

Department
Abstract

In a recent paper [1] a nonlinear method was suggested to evaluate adhesive joint quality and it was pointed out that nonlinear measurements are more directly correlated to mechanical strengths than linear ones. In that paper a new dynamic acousto-elastic measurement technique was introduced and shown to be sensitive enough to measure both first and second order nonlinearities at load levels of 15% of the ultimate strength. At this stress level special geometry of the adhesive joint sample is required in order to adopt the sample to a high power loading machine. Lower stress levels however can be generated by low frequency high power ultrasonic transducer which would replace the loading machine and make the technique truly a nondestructive one. The objective of this paper is to introduce a more sensitive measurement technique to measure both first and second order nonlinearities in a thin adhesive layer at stress level of 1–2% of the ultimate strength.

Comments
Description
Keywords
Citation
DOI
Copyright
Tue Jan 01 00:00:00 UTC 1991