Demonstrates an ultrasonic method for detecting contact stress in rough interfaces, suggesting improved measurement accuracy.
The contact stress at the assembly interface has a direct impact on the stiffness and damping characteristics of the joint. However, the unique location of the interface and the discontinuity of the acoustic transmission medium pose significant challenges to accurate stress measurement. In this study, the contact mechanism of rough assembly interfaces is systematically investigated, and the acoustic transmission behaviour across multi-layer interfaces is analysed. Based on the established mapping relationship among contact stress, contact gap, and sound intensity transmission coefficient, an ultrasonic method for detecting normal contact stress is proposed. Experimental results indicate that the maximum deviation between theoretical predictions and measurements is 14.30%, providing reliable data support for further investigation of contact characteristics in rough assembly interfaces.
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Li et al. (2026) studied this question.
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