Theoretical and experimental investigation of circumferential guided waves in orthotropic annuli

Jinyun Lin; Jian Li; Can Jiang; Xin Chen; Zhifeng Tang; Zhoumo Zeng; Yang Liu

doi:10.1016/j.ultras.2022.106715

Theoretical and experimental investigation of circumferential guided waves in orthotropic annuli

Ultrasonics. 2022 Jul:123:106715. doi: 10.1016/j.ultras.2022.106715. Epub 2022 Feb 28.

Authors

Jinyun Lin¹, Jian Li¹, Can Jiang², Xin Chen³, Zhifeng Tang⁴, Zhoumo Zeng¹, Yang Liu⁵

Affiliations

¹ State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China.
² State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China.
³ Sensor Systems and NDE Technology Section, Southwest Research Institute, San Antonio, TX 78238, USA.
⁴ Institute of Advanced Digital Technologies and Instrumentation, College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou 310027, China.
⁵ State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China. Electronic address: ultrasonicslab@tju.edu.cn.

PMID: 35245837
DOI: 10.1016/j.ultras.2022.106715

Abstract

The fiber composite materials fabricated by stacking the lamina structure obtain increasing attention in the industry, and at the same time, damage analysis is essential for safe operation. A proposed way to detect defects such as debonding and delamination is to induce circumferential guided waves. Accurate determination of the dispersion characteristics and wave fields is a prerequisite for using acoustic guided waves. The aim of this work is to provide such an accurate dispersion results in an arbitrarily thick cylindrically orthotropic homogeneous cylindrical shell of uniform thickness. Compared with the traditional SAFE method, the proposed method, which combines the two numerical methods, namely Floquet Boundary Condition (Floquet BC) Method and Sweeping Frequency Finite Element Modeling (SFFEM) method has obvious advantages. Through Floquet BC method, a theoretical result can be easily obtained without tedious code writing. Then SFFEM helps to verify the theoretical result in an experimental way. Besides, the slight gap between the theoretical and experimental results works as a basis for calibrating the elastic constants of composite materials provided in the manual. Simulations in COMSOL Multiphysics FE software supported by both methods and experiments by the latter have been carried out in this work. The calculated phase velocity dispersion curves demonstrated the efficiency of those two methods. The developed method can be adapted to other complex pipeline structures to extract circumferential guided wave dispersion characteristics by both simulation and experimental measurements.

Keywords: Circumferential guided waves; Dispersion characterstics; Floquet boundary conditions; Orthotropic composite material; Sweeping frequency finite element modeling.