Damage Identification of Cracked Pipes Based on Reflection Characteristics of Guided Waves

Abstract:

A methodology of damage identification for the circumferentially cracked pipe is presented by using the quantitative relationship between crack size and reflection characteristics of guided waves. Firstly, the reflection characteristics and mode conversion behavior were theoretically studied by the 3-D finite element (FE) analysis. It is found that the reflection coefficients (RCs) of longitudinal L(0,2) and F(1,3) modes quantitatively is related to the circumferential length and radial depth of the crack. Then we present a novel method to quantitatively identify the crack. The feasibility of the proposed method was numerically investigated. The method only requires the longitudinal excitation mode of guided wave in the pipe, which shows the good potential for real application or in-situ damage monitoring. Introduction

• Periodical: Applied Mechanics and Materials (Volumes 94-96)
• Pages: 623-626
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.94-96.623
• Online since: September 2011
• Authors: Xiong Wei Hu, Xin Feng, Jing Zhou
• Keywords: Crack, Nondestructive Testing (NDT), Numerical Simulation, Ultrasonic Guided Wave

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