A novel ultrasonic solid coupling inspection model based on interface total load capacity

Ultrasonic solid coupling inspection is a non-destructive testing technique that employs solid materials as coupling mediums. In this study, we investigated the propagation characteristics of ultrasonic waves at interfaces in solid coupling. Additionally, we established a dry coupling interface model based on interface total load and roughness, from which we derived the reflection coefficient. Using the solid coupling material selected as per our optimization, solid coupling ultrasonic testing experiments were conducted. The experimental results demonstrate that the roughness of the solid j/coupling interface significantly reduces coupling efficiency, and increasing the pressure between solid interfaces enhances coupling performance. Through the developed stochastic rough interface model, we quantitatively analyzed the influence of rough interfaces and interface pressure, offering new insights into ultrasonic solid coupling inspection.