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Authors: Cunfu He (Beijing University of Technology) , Yongkun Yi (Beijing University of Technology) , Yan Lyu (Beijing University of Technology) , Guorong Song (Beijing University of Technology)
Bonded composite plates with thick adhesive layers are widely distributed in wind turbine blades. Consequently, extracting the ultrasonic reflection spectrums of these bonded structures is of great significance in evaluating the bonding quality. On account of this, the major purpose of this paper is to develop a calculation method for obtaining ultrasonic reflection spectrums of the proposed bonded structures. First of all, according to the constitution of bonded composite plates with thick adhesive layers, the analytical model of triple-layers with “anisotropic - isotropic - anisotropic” material distribution pattern is set up. Considering the non-negligible thickness of the adhesive layers, the established model consists of two composite layers and one adhesive layer actually. Then based on the partial wave technique and the global matrix method, the displacement field and stress field in each layer are solved. Meanwhile, by combining the boundary conditions on those two interfaces between composite layer and adhesive layer integrated by spring model, the ultrasonic spectrums related to the excitation frequencies and incident angles are extracted eventually.
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How to Cite: He, C. . , Yi, Y. . , Lyu, Y. . & Song, G. . (2019) “Calculation of ultrasonic reflection spectrums of bonded composite plates with thick adhesive layers”, Review of Progress in Quantitative Nondestructive Evaluation.(0).