Related Experiment Video
Updated: May 10, 2025

Micro/Nano-scale Strain Distribution Measurement from Sampling Moiré Fringes
Published on: May 23, 2017
Delamination Detection in CFRP Stringers with A0-Mode Lamb Wave Curvature
Gaozheng Zhao1,2, Yike Zeng1, Zhenyang Yu1
1State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China.
Abstract:
Ultrasonic detection of delamination in stringer-stiffened panels made of carbon fiber-reinforced plastics (CFRPs) presents a critical challenge due to their complex geometry, complicated properties and large size. In this work, a delamination detection method using the wavefield curvature of the A0-mode Lamb wave is proposed. Firstly, the underlying mechanism is numerically investigated to examine the interactions between the A0-mode Lamb wave and delamination at different sites of the stringer. Then, the wavefield curvature sensitive to local anomalies is revealed owing to the higher-order derivative nature. Thereafter, the proposed method is utilized to detect delamination in the fabricated CFRP specimens and the results are compared with X-ray computed tomography, confirming the feasibility and effectiveness of the proposed method. This viable method, capable of detecting delamination in larger CFRP stringers, will find great potential in the efficient non-destructive testing of CFRP structures in different applications.
Related Concept Videos
Lumber Defects
Shakes are minor fractures that run along or across the wood's annual rings, while wane is...
Wood Products
Glue-laminated wood, often referred to as glulam, combines multiple smaller pieces of dimensional lumber using adhesives to form a single, larger piece. Cross-laminated timber consists...
Plastic Deformations
Stress-Strain Diagram - Ductile Materials

