Related Experiment Video
Updated: Mar 9, 2026

Visualization of Flow Field Around a Vibrating Pipeline Within an Equilibrium Scour Hole
Published on: August 26, 2019
Assessment of accumulated damage in circular tubes using nonlinear circumferential guided wave approach: A
Mingxi Deng1, Guangjian Gao1, Yanxun Xiang2
1Department of Physics, Logistics Engineering University, Chongqing 401331, China.
Abstract:
The feasibility of using the nonlinear effect of primary Circumferential Guided Wave (CGW) propagation for assessing accumulated damage in circular tubes has been investigated. For a given circular tube, an appropriate mode pair of fundamental and double frequency CGWs is chosen to enable that the second harmonic of the primary wave mode can accumulate along the circumferential direction. After the given circular tube is subjected to compression-compression repeated loading for different numbers of loading cycles, the corresponding ultrasonic measurements are conducted. It is found that there is a direct correlation between the acoustic nonlinearity parameter measured with CGWs propagating through one full circumference and the level of accumulated damage in the circular tube. The experimental result obtained validates the feasibility for quantitative assessment of the accumulated damage in circular tubes using the effect of second-harmonic generation by CGW propagation.
Related Concept Videos
Steady, Laminar Flow in Circular Tubes
Deformation in a Circular Shaft
Plastic Deformation in Circular Shafts
Thin-Walled Hollow Shafts
Stresses under Combined Loadings
The process begins by slicing the tube at critical points and analyzing the internal forces and stress components at these sections, focusing on the centroid. Normal stresses, generated by axial forces and bending moments, are either compressive or tensile and vary across the section from...
Residual Stresses in Circular Shafts

