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.
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References
P.B. Nagy, P. McGowan and L. Adler, in Review of Progress in Quantitative NDE, edited by D.O. Thompson and D.E. Chimenti (Plenum Press, New York, 1990), Vol. 9B, pp. 1635–1692.
M.A. Breazale, in Review of Progress in Quantitative NDE, edited by D.O. Thompson and D.E. Chimenti (Plenum Press, New York, 1990), Vol.9B, pp. 1653–1660.
D.S. Hughes and J.L. Kelly, Physics Review, Vol. 92, p. 1145.
M. Goland and M. Reissner, J. Appl. Mech. 44, pp. A17–A27 (1944).
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© 1991 Plenum Press, New York
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McGowan, P., Adler, L. (1991). Higher Order Nonlinearity Measurement Techniques in Thin Adhesive Layer. In: Thompson, D.O., Chimenti, D.E. (eds) Review of Progress in Quantitative Nondestructive Evaluation. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3742-7_92
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DOI: https://doi.org/10.1007/978-1-4615-3742-7_92
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4613-6666-9
Online ISBN: 978-1-4615-3742-7
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