2012 Fiscal Year Final Research Report

Ultrasonic nondestructive testing for surface-breaking crack on steel plates using leaky Lamb waves

Research Project

Project/Area Number	23760427
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Multi-year Fund
Research Field	Structural engineering/Earthquake engineering/Maintenance management engineering
Research Institution	Okayama University
Principal Investigator	KIMOTO Kazushi 岡山大学, 大学院・環境生命科学研究科, 准教授 (30323827)
Project Period (FY)	2011 – 2012
Keywords	超音波探傷 / 非破壊検査 / 逆解析 / ガイド波
Research Abstract	This study is concerned with a development of ultrasonic non-destructive method for characterization of surface-breaking cracks on a steel plate using leaky Lamb waves, which is a kind of acoustic waves generated by guided-waves traveling in a fluid-loaded solid. To begin with, a simulation code was developed to analyze generation and propagation mechanisms of the leaky waves. A numerical inverse technique to identify surface-breaking crack was then proposed in conjunction with a guided wave mode-separation technique. Finally, a high-precision and resolution leaky wave measurement system was developed for future experimental validation of the proposed technique

(4 results)