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


Vol. 23,  No. 3, pp. 791-799, Mar.  2022
10.1007/s12221-022-3191-7


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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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  Cite this article

[IEEE Style]

T. Zhang, X. Li, L. Chen, "Linking UT Signals to Properties of Weakly Bonded Composites by Four-point Bending Test," Fibers and Polymers, vol. 23, no. 3, pp. 791-799, 2022. DOI: 10.1007/s12221-022-3191-7.

[ACM Style]

Ting Zhang, Xiangqian Li, and Leishan Chen. 2022. Linking UT Signals to Properties of Weakly Bonded Composites by Four-point Bending Test. Fibers and Polymers, 23, 3, (2022), 791-799. DOI: 10.1007/s12221-022-3191-7.

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