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Linking UT Signals to Properties of Weakly Bonded Composites by Four-point Bending Test

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Abstract

A new method of producing accurately controlled bond ratios in weakly bonded composites was developed to investigate the influence of adhesive porosity on mechanical properties of the bondline. The ultrasonic A-scan was used to detect weak bonds in adhesive joints and the ultrasonic A-scan signals of weak bonds were analyzed to link with adhesive porosity. As well, relations of adhesive porosities to four-point bending (4PB) were established based on experimental and numerical results. It was found that the amplitudes of amplitudes of A-scan signals of the adhesive interface are approximately linear functions of the bond ratios, as well as the adhesive porosities. The shear strength of bondlines decreases linearly with the bond ratios. Based on above results, properties of weak bonds could be evaluated by the UT (Ultrasonic Test) signals, which is of great value in engineering application.

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Acknowledgements

The financial support provided by the Science and Technology Commission of Shanghai Municipality, China through the grant No. 19DZ1100300 and No.18DZ2204600, the Fundamental Research Funds for the Central Universities of China through Grant No.2232019G-02 to the work presented here are gratefully acknowledged.

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Authors and Affiliations

  1. Department of Discipline Engineering, AECC Commercial Aircraft Engine Co., Ltd., Shanghai, 200241, China

    Ting Zhang & Xiangqian Li

  2. Shanghai Engineering Research Center of Civil Aero Engine, Shanghai, 200241, China

    Ting Zhang & Xiangqian Li

  3. School of Aeronautics and Astronautics Aerospace, Shanghai Jiao Tong University, Shanghai, 200240, China

    Leishan Chen

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  1. Ting Zhang
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  2. Xiangqian Li
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  3. Leishan Chen
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Correspondence to Ting Zhang.

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Zhang, T., Li, X. & Chen, L. Linking UT Signals to Properties of Weakly Bonded Composites by Four-point Bending Test. Fibers Polym 23, 791–799 (2022). https://doi.org/10.1007/s12221-022-3191-7

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  • DOI: https://doi.org/10.1007/s12221-022-3191-7

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