Journal Title
Title of Journal: J Nondestruct Eval
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Abbravation: Journal of Nondestructive Evaluation
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Authors: Juergen Koreck Christine Valle Jianmin Qu Laurence J Jacobs
Publish Date: 2007/10/13
Volume: 26, Issue: 2-4, Pages: 97-105
Abstract
This research develops a guided waves technique to nondestructively characterize the stiffness properties of bonded engineering components This study first quantifies the influence of the relevant adhesive layer properties—Young’s modulus Poisson’s ratio and bond thickness—on the dispersion curves of a twolayer bonded system an aluminum plate with an adhesive tape layer bonded to its lower surface Both a commercial finite element FE code ABAQUS/Explicit and the global matrix method GMM are used to determine the dispersion relationships of this bonded plate system in the form of frequencywavenumber and slownessfrequency relations These dispersion curves are then used to determine a set of adhesive tape parameter sensitive points whose frequency coordinates represent the solution criteria for a proposed inversion procedure This inversion is based on the GMM and assumes the three adhesive tape properties are unknown The performance of this inversion procedure depends on the number of input timedomain signals it is possible to solve the inverse problem for all three of the unknown adhesive tape properties if multiple input signals are known
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